Magnetic susceptibility anisotropy of grain-aligned oxygen-deficient Y1Ba2Cu3Ox (6.46{slanted equal to or less-than}x{slanted equal to or less-than}6.98)

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

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Pages (from-to)95-102
Number of pages8
JournalPhysica C: Superconductivity and its Applications
Volume201
Issue number1-2
DOIs
Publication statusPublished - Oct 10 1992

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Magnetic susceptibility
Anisotropy
Oxygen
magnetic permeability
anisotropy
oxygen
Zirconium
Chemical analysis
Annealing
Temperature
Magnetic resonance
Neutron diffraction
Copper
Magnetic fields
annealing
magnetic resonance
neutron diffraction
disorders
copper
room temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Magnetic susceptibility anisotropy of grain-aligned oxygen-deficient Y1Ba2Cu3Ox (6.46{slanted equal to or less-than}x{slanted equal to or less-than}6.98). / Lee, Moohee; Tea, N.; Song, Y. Q.; Halperin, W. P.; Thiel, J.; Kennard, M. A.; Poeppelmeier, Kenneth 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 journalArticle

Lee, Moohee ; Tea, N. ; Song, Y. Q. ; Halperin, W. P. ; Thiel, J. ; Kennard, M. A. ; Poeppelmeier, Kenneth R ; Fang, M. M. ; Welp, U. / Magnetic susceptibility anisotropy of grain-aligned oxygen-deficient Y1Ba2Cu3Ox (6.46{slanted equal to or less-than}x{slanted equal to or less-than}6.98). In: Physica C: Superconductivity and its Applications. 1992 ; Vol. 201, No. 1-2. pp. 95-102.
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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.",
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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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