Hoffmann, W. ; Breitzke, H. ; Simmons, C. T. ; Lüders, K. ; Buntkowsky, G. ; Limbach, H. H. ; Antipov, E. V. ; Gippius, A. A. ; Loebich, O. ; Khan, H. R. ; Paranthaman, M. ; Thompson, J. R. (1995):
Hg-199 and Cu-65,Cu-65 Nmr-Studies of Mercury Based High-T-C Supercouductors.
In: Applied Magnetic Resonance, 8 (1), pp. 57-65. [Article]
Abstract
Hg-oxide ceramic high temperature superconductors were studied by Hg-199 and (CU)-C-63,65 NMR spectroscopy. Room temperature spectra, spin-spin and spin-lattice relaxation times of samples with different superconducting transition temperatures are presented. A spin-lattice relaxation time of T-1 = 35 msec and a spin-spin relaxation time of T-2 = 1.6 msec were found for the Hg-199 NMR. All samples exhibit similar characteristic powder spectra caused by an axially symmetric Hg-199 spin interaction. The isotropic value and the anisotropy of the tenser relative to solid HgCl2 as a standard substance is estimated. Furthermore, results of (CU)-C-63,65 NMR measurements at a temperature of 4.2 K which exhibit a typical powder line shape (for I = 3/2) are presented.
| Item Type: | Article |
|---|---|
| Erschienen: | 1995 |
| Creators: | Hoffmann, W. ; Breitzke, H. ; Simmons, C. T. ; Lüders, K. ; Buntkowsky, G. ; Limbach, H. H. ; Antipov, E. V. ; Gippius, A. A. ; Loebich, O. ; Khan, H. R. ; Paranthaman, M. ; Thompson, J. R. |
| Title: | Hg-199 and Cu-65,Cu-65 Nmr-Studies of Mercury Based High-T-C Supercouductors |
| Language: | English |
| Abstract: | Hg-oxide ceramic high temperature superconductors were studied by Hg-199 and (CU)-C-63,65 NMR spectroscopy. Room temperature spectra, spin-spin and spin-lattice relaxation times of samples with different superconducting transition temperatures are presented. A spin-lattice relaxation time of T-1 = 35 msec and a spin-spin relaxation time of T-2 = 1.6 msec were found for the Hg-199 NMR. All samples exhibit similar characteristic powder spectra caused by an axially symmetric Hg-199 spin interaction. The isotropic value and the anisotropy of the tenser relative to solid HgCl2 as a standard substance is estimated. Furthermore, results of (CU)-C-63,65 NMR measurements at a temperature of 4.2 K which exhibit a typical powder line shape (for I = 3/2) are presented. |
| Journal or Publication Title: | Applied Magnetic Resonance |
| Volume of the journal: | 8 |
| Issue Number: | 1 |
| Uncontrolled Keywords: | o system superconductivity nqr hgba2cacu2o6+delta hgba2cuo4+delta ba2ycu3o7 shifts 150-k salts |
| Divisions: | 07 Department of Chemistry 07 Department of Chemistry > Physical Chemistry |
| Date Deposited: | 27 Oct 2014 20:43 |
| URL / URN: | http://apps.webofknowledge.com/full_record.do?product=WOS&se... |
| Additional Information: | Qm199 Times Cited:3 Cited References Count:21 |
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