Nuclear magnetic resonance and nuclear quadrupole resonance study of copper in Ba2YCu3O7

R. E. Walstedt; W. W. Warren; R. F. Bell; G. F. Brennert; G. P. Espinosa; J. P. Remeika; R. J. Cava; E. A. Rietman

doi:10.1103/PhysRevB.36.5727

Nuclear magnetic resonance and nuclear quadrupole resonance study of copper in Ba2YCu3O7

R. E. Walstedt, W. W. Warren, R. F. Bell, G. F. Brennert, G. P. Espinosa, J. P. Remeika, R. J. Cava, E. A. Rietman

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Abstract

Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies of copper nuclei are reported for high-quality single-phase powder samples of Ba2YCu3O7. The high-field Cu63 NMR spectrum shows well-defined axial symmetry for the chain-forming Cu(1) site and evidence of appreciable disorder in the Cu(2) planes. Spontaneous oxygen loss was found to degrade the sharp NMR spectrum of the Cu(1) site. Spin-lattice relaxation rates reveal strikingly different electron dynamics for the two sites. For neither site do the rates exhibit conventional Bardeen-Cooper-Schrieffer behavior near Tc.

Original language	English (US)
Pages (from-to)	5727-5730
Number of pages	4
Journal	Physical Review B
Volume	36
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.36.5727
State	Published - 1987
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1103/PhysRevB.36.5727

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title = "Nuclear magnetic resonance and nuclear quadrupole resonance study of copper in Ba2YCu3O7",

abstract = "Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies of copper nuclei are reported for high-quality single-phase powder samples of Ba2YCu3O7. The high-field Cu63 NMR spectrum shows well-defined axial symmetry for the chain-forming Cu(1) site and evidence of appreciable disorder in the Cu(2) planes. Spontaneous oxygen loss was found to degrade the sharp NMR spectrum of the Cu(1) site. Spin-lattice relaxation rates reveal strikingly different electron dynamics for the two sites. For neither site do the rates exhibit conventional Bardeen-Cooper-Schrieffer behavior near Tc.",

author = "Walstedt, {R. E.} and Warren, {W. W.} and Bell, {R. F.} and Brennert, {G. F.} and Espinosa, {G. P.} and Remeika, {J. P.} and Cava, {R. J.} and Rietman, {E. A.}",

year = "1987",

doi = "10.1103/PhysRevB.36.5727",

language = "English (US)",

volume = "36",

pages = "5727--5730",

journal = "Physical Review B",

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publisher = "American Physical Society",

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TY - JOUR

T1 - Nuclear magnetic resonance and nuclear quadrupole resonance study of copper in Ba2YCu3O7

AU - Walstedt, R. E.

AU - Warren, W. W.

AU - Bell, R. F.

AU - Brennert, G. F.

AU - Espinosa, G. P.

AU - Remeika, J. P.

AU - Cava, R. J.

AU - Rietman, E. A.

PY - 1987

Y1 - 1987

N2 - Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies of copper nuclei are reported for high-quality single-phase powder samples of Ba2YCu3O7. The high-field Cu63 NMR spectrum shows well-defined axial symmetry for the chain-forming Cu(1) site and evidence of appreciable disorder in the Cu(2) planes. Spontaneous oxygen loss was found to degrade the sharp NMR spectrum of the Cu(1) site. Spin-lattice relaxation rates reveal strikingly different electron dynamics for the two sites. For neither site do the rates exhibit conventional Bardeen-Cooper-Schrieffer behavior near Tc.

AB - Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies of copper nuclei are reported for high-quality single-phase powder samples of Ba2YCu3O7. The high-field Cu63 NMR spectrum shows well-defined axial symmetry for the chain-forming Cu(1) site and evidence of appreciable disorder in the Cu(2) planes. Spontaneous oxygen loss was found to degrade the sharp NMR spectrum of the Cu(1) site. Spin-lattice relaxation rates reveal strikingly different electron dynamics for the two sites. For neither site do the rates exhibit conventional Bardeen-Cooper-Schrieffer behavior near Tc.

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JO - Physical Review B

JF - Physical Review B

IS - 10

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Nuclear magnetic resonance and nuclear quadrupole resonance study of copper in Ba2YCu3O7

Abstract

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