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1	Author	R. Julian, C. Brown, MeganE. Shortreed, AndrewJ. Szabo, BrianM. Powell, StephenN. Stuart	Requires cookie*
	Title	NQR and Neutron Diffraction in Scheelites
	Abstract	Measurements of the spin-lattice relaxation time for rhenium in KRe04 and NH4Re04 are reported; relaxation rates are extremely fast due to the large quadrupole moment of Re. Calculations of the electric field gradient in KRe04 show that the EFG is a very sensitive function of the orientation of the anion in the unit cell as well as of the unit cell dimensions, and that geometrical effects make a major contribution to the temperature dependence. Neutron diffraction in these two salts has been employed to determine the temperature dependence of structural parameters over a wide range of temperature, and preliminary results are reported.
	Reference	Z. Naturforsch. 47a, 308—312 (1992); received August 4 1991
	Published	1992
	Keywords	NQR, Relaxation, Electric field gradient, Neutron diffraction
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	TEI-XML for	default:Reihe_A/47/ZNA-1992-47a-0308.pdf
	Identifier	ZNA-1992-47a-0308
	Volume	47

2	Author	DesmondC. Cook	Requires cookie*
	Title	Measurement of Nuclear Quadrupole Interactions using Mössbauer Spectroscopy
	Abstract	Mössbauer spectroscopy is a useful probe for investigating nuclear quadrupole interactions. It enables the magnitude, sign and asymmetry of the electric quadrupole coupling constant to be determined. It is especially important for its ability to measure these parameters for excited nuclear states. The Mössbauer effect is used to measure excited state quadrupole moments in materials whose electric field gradient (EFG) is known. More commonly however, it is used to determine the EFG from which atomic bonding and electronic structure are determined. The technique also allows temperature dependent orientation of sublattice magnetization to be measured using the direction of the electric quadrupole coupling as a reference.
	Reference	Z. Naturforsch. 51a, 368—372 (1996); received November 20 1995
	Published	1996
	Keywords	Mössbauer Effect, Electric Field Gradient, Quadrupole Interaction
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	TEI-XML for	default:Reihe_A/51/ZNA-1996-51a-0368.pdf
	Identifier	ZNA-1996-51a-0368
	Volume	51

3	Author	Lars Hemmingsen, Ulf Ryde, Rogert Bauer	Requires cookie*
	Title	Nuclear Quadrupole Interactions in Cadmium Complexes: Semiempirical and ab initio Calculations
	Abstract	Semiempirical calculations, based on the so-called angular overlap model, have been compared with ab initio methods (MP2) for the calculation of nuclear quadrupole interactions (NQPs) in cadmium complexes with biologically relevant ligands (H2O, OH -, cysteinate, carboxylate, and imidazole). The assumptions on which the semiempirical model is based have been tested and the comparison indicates that: 1) A change in the Cd-ligand bond length by 0.1 A may change the electric field gradient (EFG) by about 0.2 a. u.. A simple scheme to incorporate such effects in the semiempirical method is suggested. 2) The effect of ligand-ligand interactions is up to about 0.2 a. u. for the largest diagonal element of the EFG tensor for the tested complexes, and such effects can significantly influence the so-called asymmetry parameter. 3) The position of non-coordinating atoms on the ligands can in some cases (e. g. the hydrogen atoms of water) significantly influence the EFG. The combined effect of non-coordinating atoms and ligand-ligand interactions may cause deviations of up to 0.35 a.u. between ab initio and the semiempirical calculations. 4) In the semiempirical model each ligand is characterised by one parameter, the so-called partial nuclear quadrupole interaction. This parameter has been evaluated by ab initio calculations, and agreement was found within about 0.2 a. u. (« 40 Mrad/s) for all ligands except imidazole. 5) A change in the coordination number from 2 to 6 may change the partial NQI by about 0.3 a. u.
	Reference	Z. Naturforsch. 54a, 422—430 (1999); received March 29 1999
	Published	1999
	Keywords	Electric Field Gradient, Angular Overlap Model, Ligand Additivity
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	TEI-XML for	default:Reihe_A/54/ZNA-1999-54a-0422.pdf
	Identifier	ZNA-1999-54a-0422
	Volume	54

4	Author	David Stephenson, JohnA S Smith	Requires cookie*
	Title	The Zeeman Effect in Quadrupole Double Resonance Spectra: Dependence of the Line Shapes on the Orientation of the Electric Field Gradient Tensor
	Abstract	The solid effect spectrum of 1,4-dichlorobenzene was recorded at magnetic field strengths in excess of 50 G; at these field strengths Zeeman structure is seen on the 35C1 resonance. Unlike in single resonance experiments, peaks are asymmetric, and the high frequency and low frequency solid effect peaks have not the same shape. Computer calculation o f the solid effect spectrum gives peaks which show the same asymmetry as the experimental spectrum. The simulated line shapes are found to depend on the direction the principal com ponents o f the electric field gradient in the crystal framework and indicate that qyy lies in the plane o f the benzene ring.
	Reference	Z. Naturforsch. 49a, 351 (1994); received July 23 1993
	Published	1994
	Keywords	35C1 quadrupole resonance, Zeeman effect, D ouble resonance, Electric field gradient
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	TEI-XML for	default:Reihe_A/49/ZNA-1994-49a-0351.pdf
	Identifier	ZNA-1994-49a-0351
	Volume	49

5	Author	StadeS. Nunes, S. Sulaiman, N. Sahoo, T. P. Das, M. Frank, W. Kreische, K. B. Nielsen	Requires cookie*
	Title	Study of the Location of Implanted Fluorine Atoms in Silicon and Germanium through Their Nuclear Quadrupole Interactions
	Abstract	Time Differential Perturbed Angular Distribution (TDPAD) measurements of the nuclear quadrupole hyperfine parameters for 19 F* implanted into amorphous, polycrystalline and crys-talline silicon and germanium are reported and reviewed. Two signals are observed in the crystalline materials (« 35 and 23 MHz in silicon, % 33 and 27 MHz in germanium) while only one is detected in the amorphous and polycrystalline samples (ä22 MHz in silicon, «27 in germanium). Impurity sites in these materials were modeled using a Hartree-Fock cluster procedure. The Intrabond, Antibond, and Substitutional sites in the bulk were studied in both silicon and germanium. The ATOP and Intrabond Surface sites were also studied in silicon and the results extended to germa-nium. Lattice relaxation effects were incorporated by employing a geometry optimization method to obtain minimum energy configurations for the clusters modelling each site. The electronic wave functions were obtained for each optimized cluster by applying Unresctricted Hartree-Fock theory, and these wave functions were used to calculate the nuclear quadrupole hyperfine parameters at the site of the fluorine nucleus. Comparison of the theoretical hyperfine parameters to the experimental values indicates that 19 F* located in the Intrabond and Intrabond surface sites could readily explain the higher frequency signal that has been observed. 19 F* in the Antibond and the surface ATOP sites yield hyperfine parameters consistent with the low frequency signal observed in the crystalline materials and the single signal observed in the amorphous (or polycrystalline) materials. Examina-tion of these two sites, in view of other available experimental evidence including the temperature dependence of the TDPAD signals, leads to the conclusion that the lower frequency signal is due to 19 F* implants which have come to rest at the site of dangling bonds in the bulk. These dangling bonds are created as a result of damage generated in the individual collision cascades during the implantation process.
	Reference	Z. Naturforsch. 51a, 560—564 (1996); received December 12 1995
	Published	1996
	Keywords	Semiconductors, Impurities, Electronic structure, Hartree-Fock, Electric field gradient
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	TEI-XML for	default:Reihe_A/51/ZNA-1996-51a-0560.pdf
	Identifier	ZNA-1996-51a-0560
	Volume	51

6	Author	A. C. Junqueira, A. W. Carbonari, J.Mestnik Filho, R. N. Saxena	Requires cookie*
	Title	Electric Field Gradient at Nb Site in the Intermetallic Compounds Nb 3 X (X = AI, In, Si, Ge, Sn) Measured by PAC
	Abstract	The electric field gradient (efg) at the Nb site in the intermetallic compounds Nb 3 X (X = Al, In, Si, Ge, Sn) was measured by the Perturbed Angular Correlation (PAC) method using the well-known gamma-gamma cascade of 133 -482 keV in lxl Ta from the ß~ decay of 1K1 Hf, substituting approximately 0.1 atom percent of Nb. The PAC results show that V zz drops by nearly 40% when X changes from Al to In, and by about 25% when X changes from Si to Ge and Sn. This behavior is most probably related to the change in the degree of sp hybridization in these compounds. The V zz values of the studied compounds do not follow the well known universal correlation for the efg's in non-cubic metals but the observed trend is well reproduced by results of ab-initio electronic structure calculations. In the case of Nb 3 Al a linear temperature dependence of the quadrupole frequencies was observed in the temperature range of 6.5 to 1210 K.
	Reference	Z. Naturforsch. 55a, 41—14 (2000); received August 25 1999
	Published	2000
	Keywords	Electric Field Gradient, PAC Measurements, Nb-based Alloys, Quadrupole Interactions
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	TEI-XML for	default:Reihe_A/55/ZNA-2000-55a-0041.pdf
	Identifier	ZNA-2000-55a-0041
	Volume	55

7	Author	Hirokazu Nakayama, Kazuya Saito, Michihiko Kishita	Requires cookie*
	Title	Improvement of Bertaut's Method for Calculating Electric Field Gradient
	Abstract	Bertaut's method for calculating the electric field and its gradient is analyzed. The formula for the electric field is always valid, whereas that for the electric field gradient holds only for an infinitely large unit cell. We present a practical method to use the formulae.
	Reference	Z. Naturforsch. 45a, 375—379 (1990); received August 23 1989 in revised version January 5 1990
	Published	1990
	Keywords	Electric field gradient, Electrostatic potential, Electrostatic field, Lattice sum, Bertaut's method
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	TEI-XML for	default:Reihe_A/45/ZNA-1990-45a-0375.pdf
	Identifier	ZNA-1990-45a-0375
	Volume	45

8	Author	Karlheinz Schwarz, Peter Blaha	Requires cookie*
	Title	Ab initio Calculations of the Electric Field Gradients in Solids in Relation to the Charge Distribution
	Abstract	A first principles method for the computation of electric field gradients (EFGs) is illustrated for various solids. This scheme is based on self-consistent energy band-structure calculations by the full potential linearized augmented plan wave (FLAPW) method which provides the electronic charge density including all polarization effects. By numerically solving Poisson's equation we obtain the Coulomb potential in a form which allows to compute the EFG directly. Our method is demon-strated for insulators (Cu20), metals (hcp-Zn), supercondutors (YBa2Cu3Ö7) and molecular crystals (Cl2, Br2, I2).
	Reference	Z. Naturforsch. 47a, 197—202 (1992); received August 3 1991
	Published	1992
	Keywords	Band-structure calculation, Electric field gradient, Nuclear quadrupole interaction, Molecular crystals, High-Tc superconductors
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	TEI-XML for	default:Reihe_A/47/ZNA-1992-47a-0197.pdf
	Identifier	ZNA-1992-47a-0197
	Volume	47

9	Author	Jiahu Wang, VedeneH. Smith	Requires cookie*
	Title	Ab initio Study of the Electric Field Gradients in SC1 2
	Abstract	The electric field gradients (EFG) in SC1 2 have been computed with both self-consistent-field (SCF) and configuration-interaction (CI) methods. The predicted EFG, along with the nuclear quadrupole moment Q N of 35 C1 and 37 C1 from other sources, allows us to compare theoretical quadrupole coupling constants with new experimental results. The best values obtained agree with the experiment within 3%. It has been found that the principal axis of the coupling tensor does not coincide with the S-Cl internuclear axis, and the tilt angle has been predicted close to that from experiment.
	Reference	Z. Naturforsch. 48a, 699—702 (1993); received March 13 1993
	Published	1993
	Keywords	Electric field gradient, Nuclear quadrupole coupling constant, SC1 2, ab initio method, Bent chemical bond
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	TEI-XML for	default:Reihe_A/48/ZNA-1993-48a-0699.pdf
	Identifier	ZNA-1993-48a-0699
	Volume	48

10	Author	P. Blaha, K. Schwarz, P. Dufek, G. Vielsack, W. Weber	Requires cookie*
	Title	The Breathing Mode of B a B i0 3: Electric Field Gradient and Total Energy Calculations
	Abstract	We present ab initio full-potential linearized augmented plane wave (LAPW) band structure calculations for BaBiOa. We focus on total energies and electric field gradients at the oxygen site and present results for the breathing mode in the experimentally observed cubic and monoclinic struc tures of doped and undoped Baj _JC K xB i0 3.
	Reference	Z. Naturforsch. 49a, 129—132 (1994); received
	Published	1994
	Keywords	B aB i03, Total energy, Electric field gradient, Energy band structure, Breathing mode
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	TEI-XML for	default:Reihe_A/49/ZNA-1994-49a-0129.pdf
	Identifier	ZNA-1994-49a-0129
	Volume	49

11	Author	P. Wodniecki, B. Wodniecka, M. Marszalek, A. Z. Hrynkiewicz	Requires cookie*
	Title	PAC Studies of Ag-Hf Intermetallic Compounds
	Abstract	The hyperfine quadrupole interaction of 181 Ta and 111 Cd probes in HfAg and HfiAg com-pounds was studied at 24 to 1100 K with the time -differential perturbed angular correlation (TDPAC) technique. The EFGs measured in HfAg on 181 Ta and m Cd are 1.388(5)x 10 18 VcnT 2 and 0.340(5)x 10 lx Vcm -2 , respectively. For both probe atoms a linear decrease of the EFG with temperature was observed with slopes 1.1 l(2)x 10 -4 KT 1 and 1.73(5)x 10~ 4 KT 1 for 181 Ta and "'Cd, respectively. In Hf 2 Ag, 0.469(2)x 10 18 VcnT 2 was determined on 181 Ta nuclei and 0.428(5)x 10 18 Vcm -2 on '"Cd. Also a linear EFG temperature dependence with the large slope of 2.39(6)x 10 -4 K" 1 was observed for "'Cd probes in Hf 2 Ag, while the EFG measured on l8l Ta nuclei in this compound exhibits a very weak temperature variation which can be fitted neither with a linear T nor a T ?/2 dependence. In all cases the electronic contributions to the EFG are very small indicating that these transition element systems do not obey the universal correlation between the electronic and the ionic EFG observed in numerous other systems not belonging to the transition metal series.
	Reference	Z. Naturforsch. 51a, 437—441 (1996); received November 20 1995
	Published	1996
	Keywords	Hyperfine interactions, perturbed angular correlations, electric field gradient, inter-metallic compounds, Ag-Hf system
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	TEI-XML for	default:Reihe_A/51/ZNA-1996-51a-0437.pdf
	Identifier	ZNA-1996-51a-0437
	Volume	51

12	Author	K. Konzelmann, G. Majer, A. Seeger	Requires cookie*
	Title	Solid Effect Between Quadrupolar Transitions in Dilute Cu-Pd Alloys
	Abstract	The paper investigates the Dynamic Solid Effect (DSE) in Nuclear Quadrupole Double Reso-nance (NQDOR) on a system (dilute alloys of CuPd with 8, 42, 210, or 1000 at.ppm Pd) chosen for its simplicity and the possibility to test the theoretical concepts on which the experimental tech-niques (in particular the so-called Berthier-Minier technique for exhibiting the DSE) are based. NQDOR allows to observe the transitions between the Cu nuclear energy levels split by the quadrupolar interaction with the electric field gradients generated by nearby Pd atoms even in dilute alloys, in which the fraction of Cu nuclei experiencing a given field gradient is very small. The DSE permits transitions at frequencies corresponding to the sums or differences of quadrupolar level splittings at neighbouring nuclei and thus gives access to information on the spatial correlation of nuclei accessible to NQDOR studies. The DSE information is shown to be in full accord with the conclusions drawn earlier, on the basis of line-intensity arguments, on the assignment of quadrupo-lar transitions to the first four shells of Cu nuclei surrounding isolated Pd atoms but, in addition, allows to identify the low-frequency NQDOR lines associated with Cu nuclei in the fifth and sixth shells.
	Reference	Z. Naturforsch. 51a, 506—514 (1996); received February 13 1996
	Published	1996
	Keywords	Nuclear quadrupole double resonance, Atomic defects in Cu, Electric field gradients, Solid effect
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	TEI-XML for	default:Reihe_A/51/ZNA-1996-51a-0506.pdf
	Identifier	ZNA-1996-51a-0506
	Volume	51

13	Author	H. M. Petrilli, M. Marszalek, H. Saitovitch	Requires cookie*
	Title	Study of the EFG Trends in Zr 2 T (T = Fe, Co, Ni) Intermetallic Compounds
	Abstract	We use the linear muffin-tin orbital formalism, in the atomic sphere approximation, to investigate the trends of the electric field gradient (EFG) at the nucleus for the non-equivalent sites in Zr 2 T (T = Fe, Co and Ni) intermetallic compounds. As all those compounds crystallize in the same C16 crystallographic structure, they offer a rare opportunity to investigate electronic structure effects coming from transition metals on the EFG at Zr site. Those results are compared with EFG values obtained from quadrupole coupling constant measurements performed with the time differential perturbed angular correlation (TDPAC) technique, using the 181 Ta probe.
	Reference	Z. Naturforsch. 51a, 537—543 (1996); received February 13 1996
	Published	1996
	Keywords	Electric Field Gradient, Intermetallic Compounds, LMTO-ASA, Electronic Structure, Nuclear Quadrupole Interactions
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	TEI-XML for	default:Reihe_A/51/ZNA-1996-51a-0537.pdf
	Identifier	ZNA-1996-51a-0537
	Volume	51

14	Author	F. Hagelberg, T. P. Das, K. G. Weil	Requires cookie*
	Title	Electric Field Gradients for Small Antimony Based Zintl Clusters from Hartree-Fock Investigations
	Abstract	Electric Field Gradient (EFG) calculations have been carried out for Antimony based clusters with 20 and with 22 valence electrons. It is shown that EFGs are very sensitive to structural changes of the clusters under study. This feature can be used to demonstrate the validity of the Zintl-Klemm-Busmann principle for these systems through EFG determinations.
	Reference	Z. Naturforsch. 51a, 557—559 (1996); received February 3 1996
	Published	1996
	Keywords	Ab Initio Theory, Atomic Clusters, Antimony Molecules, Electric Field Gradients, Zintl Clusters
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	TEI-XML for	default:Reihe_A/51/ZNA-1996-51a-0557.pdf
	Identifier	ZNA-1996-51a-0557
	Volume	51

15	Author	H. Honda, M. Kenmotsu, N. Onoda-Yamamuro, H. Ohki, S. Ishimaru, R. Ikeda, Y. Furukawa	Requires cookie*
	Title	N and 133 Cs Solid NMR Studies on Ionic Dynamics in Plastic CsN0 2
	Abstract	The temperature dependence of the 15 N and 133 Cs NMR spin-lattice relaxation times, the 15 N spin-spin relaxation time, and the 1S N and 133 Cs spectra of CsNOi was observed in the plastic phase (209.2 < T < 673 K (m. p.)) and the low-temperature phase (Phase II). In Phase II we found the N07 180°-flip, which could be attributed to the anomalous increase of the heat capacity curve, and determined the activation energy of this motion to be 8.7-11.7 kJ mol -1 . The l5 N and 133 Cs spectra in this phase are inconsistent with the reported crystal structure R3m and can be explained by lower crystal symmetry. In the plastic phase we detected a new anionic motion with 11 kJ mol -1 , an isotropic N07 reorientation with 8.5-9 kJ mol -1 , and ionic self-diffusion with 47 kJ mol . The presence of ionic self-diffusion was confirmed by measuring the electrical conductivity.
	Reference	Z. Naturforsch. 51a, 761—768 (1996); received October 24 1995
	Published	1996
	Keywords	\|S N and 133 Cs Solid NMR, Plastic crystal Phase transition Chemical shift anisotropy, Electric field gradient
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	TEI-XML for	default:Reihe_A/51/ZNA-1996-51a-0761.pdf
	Identifier	ZNA-1996-51a-0761
	Volume	51

16	Author	K. Sato, H. Akai, T. Minamisono	Requires cookie*
	Title	Ab initio Calculations of Electric Field Gradients for Transition Metal Impurities in TiO z
	Abstract	We present ab initio calculations of EFGs at impurities in a Ti0 2 crystal. They are directly calculated from the self consistent charge distribution which is determined by the KKR method within the muffin-tin approximation and based on the local density approximation. Impurities in the crystal are simulated by the super-cell method. Considering the charge state of Sc, Ti, Nb, Cd, Ta impurities in the Ti0 2 , the experimental values were well reproduced. The electronic structure of these impurities is discussed by analyzing the calculated density of states.
	Reference	Z. Naturforsch. 53a, 396—403 (1998); received October 31 1997
	Published	1998
	Keywords	Ti0 2, Electric Field Gradient, Transition Metal Impurity, Band-Structure, Charge State
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	TEI-XML for	default:Reihe_A/53/ZNA-1998-53a-0396.pdf
	Identifier	ZNA-1998-53a-0396
	Volume	53

17	Author	K. Sato, S. Takeda, S. Fukuda, T. Minamisono, M. Tanigaki, T. Miyake, Y. Maruyama, K. Matsuta, M. Fukuda, Y. Nojiri	Requires cookie*
	Title	FT-NMR Detection of 45 Sc, 49 Ti and 93 Nb in Ti0 2 Single Crystal
	Abstract	In order to determine the electric quadrupole moment of the short-lived Remitter 41 Sc from the quad-rupole coupling constant in Ti0 2 , we measured the field gradient by detecting the Fourier-Transformed-NMR of stable isotope 45 Sc doped in TiO->. Also, in order to study the electronic structure of impurities systematically, EFGs were measured for * 5 Sc, 49 Ti and 93 Nb in a Ti0 2 single crystal.
	Reference	Z. Naturforsch. 53a, 549—551 (1998); received December 31 1997
	Published	1998
	Keywords	Ti0 2, 41 Sc, Quadrupole Moment, Transition Metal Impurity, Electric Field Gradient
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	TEI-XML for	default:Reihe_A/53/ZNA-1998-53a-0549.pdf
	Identifier	ZNA-1998-53a-0549
	Volume	53

18	Author	P. F. Meier, T. A. Claxton, P. Hüsser, S. Plibersek, E. P. Stoll	Requires cookie*
	Title	Cluster Calculations of Hyperfine Interactions in Superconducting Copper Compounds
	Abstract	This paper discusses first-principles cluster investigations on the electronic structure of YBa2Cu3Ü7 and La2CuC>4 performed at the University of Zürich. In particular, electric field gradients have been calculated at the copper sites and their dependence on applying uniaxial strain is studied. Magnetic hyperfine interactions have been evaluated from spin-polarized calculations, and the transfer of spin density from neighboring copper ions is explained. An interpretation is given of the nuclear quadrupole resonance spectra in doped La2CuC>4.
	Reference	Z. Naturforsch. 55a, 247—255 (2000); received August 26 1999
	Published	2000
	Keywords	Cluster Calculations, Electric Field Gradients, High-Temperature Superconductors, Hyperfine Fields, Nuclear Quadrupole Resonance
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	TEI-XML for	default:Reihe_A/55/ZNA-2000-55a-0247.pdf
	Identifier	ZNA-2000-55a-0247
	Volume	55

19	Author	LeonardoA. Errico, Gabriel Fabricius, Mario Rentería	Requires cookie*
	Title	FP-LAPW Study of the EFG at Impurity Sites in Oxides: Cd in Rutile TiO 2
	Abstract	We report here first-principles determination of the electric-field gradient (EFG) tensor at the Cd im-purity located at cation sites in rutile Ti0 2 . As far as we know, these represent the first ab initio calcu-lations at impurity sites with the FP-LAPW method in oxide systems. We used super-cells to simulate the diluted impurity in the crystal. The free-relaxation process performed in our study shows that the changes in distances of the oxygen nearest-neighbours to the impurity are not isotropic as was suppo-sed in a previous study within the muffin-tin approximation. Our prediction for the EFG component of major absolute value agrees well with the experiment and is opposite in sign and direction if isotropic relaxations are assumed. Our value of the asymmetry parameter r\ also compares very well with the ex-perimental value.
	Reference	Z. Naturforsch. 55a, 267—270 (2000); received August 26 1999
	Published	2000
	Keywords	Electric-Field Gradient, FP-LAPW, Impurity-Induced Lattice Relaxation, Electronic Struc-ture, Ti0 2
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	TEI-XML for	default:Reihe_A/55/ZNA-2000-55a-0267.pdf
	Identifier	ZNA-2000-55a-0267
	Volume	55

20	Author	G. Sulzer, B. Itterm, E. Diehl, B. Fischer, H.-P Frank, E. Jäger, W. Seelinger, H.-J Stockmann, H. Ackermann	Requires cookie*
	Title	Temperature Dependence of Impurity Induced EFG's in Extremely Diluted CuB
	Abstract	The temperature dependence of impurity induced EFG 's around implanted 12B ions in Cu was measured for two lattice locations using the ß-N M R method. The induced EFG at the nearest neighbouring host atoms decreases with increasing temperature for the case of 12B stopped on interstitial sites, whereas the opposite temperature behaviour was found if 12B is situated in substi tutional sites.
	Reference	Z. Naturforsch. 49a, 354 (1994); received July 23 1993
	Published	1994
	Keywords	N M R, ß radiation detected, Cross relaxation, Electric field gradient, Temperature dependence o f EFG, Impurity induced EFG
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	TEI-XML for	default:Reihe_A/49/ZNA-1994-49a-0354.pdf
	Identifier	ZNA-1994-49a-0354
	Volume	49

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