Magnetic susceptibility anisotropy of grain-aligned oxygen-deficient Y 1 Ba 2 Cu 3 O x (6.46⪕x⪕6.98)

Moohee Lee; N. Tea; Y. Q. Song; W. P. Halperin; J. Thiel; M. A. Kennard; K. R. Poeppelmeier; M. M. Fang; U. Welp

doi:10.1016/0921-4534(92)90109-P

Magnetic susceptibility anisotropy of grain-aligned oxygen-deficient Y 1 Ba 2 Cu 3 O x (6.46⪕x⪕6.98)

Moohee Lee, N. Tea, Y. Q. Song, W. P. Halperin, J. Thiel, M. A. Kennard, K. R. Poeppelmeier, M. M. Fang, U. Welp

Northwestern University

Research output: Contribution to journal › Article

7 Citations (Scopus)

Abstract

The anisotropic susceptibility of YBa₂Cu₃O_x (6.46{slanted equal to or less-than}x{slanted equal to or less-than}6.98) has been measured as a function of oxygen composition. Samples were prepared by a high temperature zirconium-getter annealing technique followed by magnetic orientation in epoxy. The normal state magnetic susceptibility was found to be weakly dependent on temperature. The room temperature values of the susceptibility decrease linearly as the oxygen composition decreases, whereas the difference in susceptibilities for magnetic fields parallel and perpendicular to the c-axis is nearly constant. This suggests that in this range of oxygen composition the susceptibility anisotropy comes mostly from the anisotropic part of the Van Vleck susceptibility and the spin susceptibility remains nearly isotropic. Neutron diffraction results show a significant oxygen occupancy at the O(5) site. Nuclear quadrupolar and magnetic resonance spectra of the plane copper indicate a marked degree of electronic disorder, confirming that there are microscopic structural effects from the high temperature zirconium-getter annealing procedure.

Original language	English
Pages (from-to)	95-102
Number of pages	8
Journal	Physica C: Superconductivity and its applications
Volume	201
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(92)90109-P
Publication status	Published - Oct 10 1992

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Lee, M., Tea, N., Song, Y. Q., Halperin, W. P., Thiel, J., Kennard, M. A., Poeppelmeier, K. R., Fang, M. M., & Welp, U. (1992). Magnetic susceptibility anisotropy of grain-aligned oxygen-deficient Y 1 Ba 2 Cu 3 O x (6.46⪕x⪕6.98). Physica C: Superconductivity and its applications, 201(1-2), 95-102. https://doi.org/10.1016/0921-4534(92)90109-P

Magnetic susceptibility anisotropy of grain-aligned oxygen-deficient Y 1 Ba 2 Cu 3 O x (6.46⪕x⪕6.98). / Lee, Moohee; Tea, N.; Song, Y. Q.; Halperin, W. P.; Thiel, J.; Kennard, M. A.; Poeppelmeier, K. R.; Fang, M. M.; Welp, U.

In: Physica C: Superconductivity and its applications, Vol. 201, No. 1-2, 10.10.1992, p. 95-102.

Research output: Contribution to journal › Article

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title = "Magnetic susceptibility anisotropy of grain-aligned oxygen-deficient Y 1 Ba 2 Cu 3 O x (6.46⪕x⪕6.98)",

abstract = "The anisotropic susceptibility of YBa2Cu3Ox (6.46{slanted equal to or less-than}x{slanted equal to or less-than}6.98) has been measured as a function of oxygen composition. Samples were prepared by a high temperature zirconium-getter annealing technique followed by magnetic orientation in epoxy. The normal state magnetic susceptibility was found to be weakly dependent on temperature. The room temperature values of the susceptibility decrease linearly as the oxygen composition decreases, whereas the difference in susceptibilities for magnetic fields parallel and perpendicular to the c-axis is nearly constant. This suggests that in this range of oxygen composition the susceptibility anisotropy comes mostly from the anisotropic part of the Van Vleck susceptibility and the spin susceptibility remains nearly isotropic. Neutron diffraction results show a significant oxygen occupancy at the O(5) site. Nuclear quadrupolar and magnetic resonance spectra of the plane copper indicate a marked degree of electronic disorder, confirming that there are microscopic structural effects from the high temperature zirconium-getter annealing procedure.",

author = "Moohee Lee and N. Tea and Song, {Y. Q.} and Halperin, {W. P.} and J. Thiel and Kennard, {M. A.} and Poeppelmeier, {K. R.} and Fang, {M. M.} and U. Welp",

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AB - The anisotropic susceptibility of YBa2Cu3Ox (6.46{slanted equal to or less-than}x{slanted equal to or less-than}6.98) has been measured as a function of oxygen composition. Samples were prepared by a high temperature zirconium-getter annealing technique followed by magnetic orientation in epoxy. The normal state magnetic susceptibility was found to be weakly dependent on temperature. The room temperature values of the susceptibility decrease linearly as the oxygen composition decreases, whereas the difference in susceptibilities for magnetic fields parallel and perpendicular to the c-axis is nearly constant. This suggests that in this range of oxygen composition the susceptibility anisotropy comes mostly from the anisotropic part of the Van Vleck susceptibility and the spin susceptibility remains nearly isotropic. Neutron diffraction results show a significant oxygen occupancy at the O(5) site. Nuclear quadrupolar and magnetic resonance spectra of the plane copper indicate a marked degree of electronic disorder, confirming that there are microscopic structural effects from the high temperature zirconium-getter annealing procedure.

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