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Hg-199 and Cu-65,Cu-65 Nmr-Studies of Mercury Based High-T-C Supercouductors

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
Journal volume: 8
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
Official URL: http://apps.webofknowledge.com/full_record.do?product=WOS&se...
Additional Information:

Qm199 Times Cited:3 Cited References Count:21

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