| | 1 | Author
| S. V. Verkhovskii, B. Z. Malkin, A. Trokiner, A. Yakubovskii, E. Hallet, A. Ananyev, A. Gerashenko, Yu Piskunov, S. Saikin, A. Tikhomirov, V. Ozhogin | Requires cookie* | | | Title
| Quadrupole Effects on 73 Ge NMR Spectra in Isotopically Controlled Ge Single Crystals  | | | | Abstract
| NMR spectra of 73 Ge (nuclear spin / = 9/2) in perfect single crystals of germanium with different isotopic content were measured at 80, 300, and 450 K. The observed specific line shapes gave evidence of the isotopic disorder, in particular, abnormal broadening of the spectrum was found for the magnetic field directed along the [111] axis. Local lattice deformations in the germanium crystal lattice due to "isotopic disorder" were calculated in the framework of the adiabatic bond charge model. The results were applied to study random non-cubic crystal field interactions with the nuclear quadrupole moments and corresponding effects on NMR spectra. The simulated second moment of the resonance frequency distributions caused by the magnetic dipole-dipole and electric quadrupole interactions are used to analyze the lineshapes, theoretical predictions being in a qualitative agreement with the experimental data. | | | |
Reference
| Z. Naturforsch. 55a, 105—110 (2000); received September 11 1999 | | | |
Published
| 2000 | | | |
Keywords
| Isotopic Disorder, Ge Single Crystal, NMR Spectra, Quadrupole Effects | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_A/55/ZNA-2000-55a-0105.pdf | | | | Identifier
| ZNA-2000-55a-0105 | | | | Volume
| 55 | |
| 2 | Author
| Takashi Ohno, Yutaka Kishimoto, Tatsuo Kanashiro, Mitsuhiro Miyamoto, Toshio Tanaka, Kazuo Miyatani | Requires cookie* | | | Title
| Change in 51 V Relaxation Rates due to CDW in CuV 2 S 4 | | | | Abstract
| The temperature variations of the 63 Cu, 65 Cu and 51 V NMR spectra and 51 V spin-lattice relaxation rate 1/T have been measured in a thiospinel CuV 2 S 4 . Drastic changes in the spectra and relaxation rates were observed at the charge density wave (CDW) transition temperature. With decreasing temperature T, 1 /Ti decreases exponentially due to the CDW transition (75 K < T< 90 K). The energy gap made by the CDW formation at 90 K is estimated to be 0.052 eV from an Arrhenius plot of 1/Tj. | | | |
Reference
| Z. Naturforsch. 51a, 773—776 (1996); received April 2 1996 | | | |
Published
| 1996 | | | |
Keywords
| CuV 2 S 4, charge density wave (CDW), NMR spectra, spin-lattice relaxation rate, energy gap- | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_A/51/ZNA-1996-51a-0773.pdf | | | | Identifier
| ZNA-1996-51a-0773 | | | | Volume
| 51 | |
|
