63,65Cu nuclear quadrupole resonance study of Ni-doped YBa2Cu3O7

Moohee Lee; W. P. Halperin; Kenneth R Poeppelmeier

doi:10.1016/S0921-4534(99)00565-1

^63,65Cu nuclear quadrupole resonance study of Ni-doped YBa₂Cu₃O₇

Moohee Lee, W. P. Halperin, Kenneth R Poeppelmeier

Northwestern University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We have prepared pure YBCO (YB₂Cu₃O_7-δ) and Ni-doped YBCO (YB_2-xLa_xCu_3-xNi_xO_7-δ, x = 0.1) samples and performed ^63,65Cu nuclear quadrupole resonance (NQR) measurements. La substitution introduced for charge compensation, as well as Ni doping, severely distorts the electric field gradient at the copper sites inducing extra ^63,65Cu NQR peaks other than the main peaks, for both the plane and the chain sites. ^63,65Cu NQR linewidths for the plane site increased significantly whereas those for the chain site remained similar. Furthermore, both the spin-lattice and the spin-spin relaxation times for the plane copper decreased whereas those for the chain copper increased. The Ni substitutional effects on linewidths and relaxation times confirm that Ni carrying a local moment substitutes for the plane copper.

Original language	English
Pages (from-to)	185-190
Number of pages	6
Journal	Physica C: Superconductivity and its Applications
Volume	329
Issue number	3
DOIs	https://doi.org/10.1016/S0921-4534(99)00565-1
Publication status	Published - Feb 1 2000

ASJC Scopus subject areas

Condensed Matter Physics

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title = "63,65Cu nuclear quadrupole resonance study of Ni-doped YBa2Cu3O7",

abstract = "We have prepared pure YBCO (YB2Cu3O7-δ) and Ni-doped YBCO (YB2-xLaxCu3-xNixO7-δ, x = 0.1) samples and performed 63,65Cu nuclear quadrupole resonance (NQR) measurements. La substitution introduced for charge compensation, as well as Ni doping, severely distorts the electric field gradient at the copper sites inducing extra 63,65Cu NQR peaks other than the main peaks, for both the plane and the chain sites. 63,65Cu NQR linewidths for the plane site increased significantly whereas those for the chain site remained similar. Furthermore, both the spin-lattice and the spin-spin relaxation times for the plane copper decreased whereas those for the chain copper increased. The Ni substitutional effects on linewidths and relaxation times confirm that Ni carrying a local moment substitutes for the plane copper.",

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N2 - We have prepared pure YBCO (YB2Cu3O7-δ) and Ni-doped YBCO (YB2-xLaxCu3-xNixO7-δ, x = 0.1) samples and performed 63,65Cu nuclear quadrupole resonance (NQR) measurements. La substitution introduced for charge compensation, as well as Ni doping, severely distorts the electric field gradient at the copper sites inducing extra 63,65Cu NQR peaks other than the main peaks, for both the plane and the chain sites. 63,65Cu NQR linewidths for the plane site increased significantly whereas those for the chain site remained similar. Furthermore, both the spin-lattice and the spin-spin relaxation times for the plane copper decreased whereas those for the chain copper increased. The Ni substitutional effects on linewidths and relaxation times confirm that Ni carrying a local moment substitutes for the plane copper.

AB - We have prepared pure YBCO (YB2Cu3O7-δ) and Ni-doped YBCO (YB2-xLaxCu3-xNixO7-δ, x = 0.1) samples and performed 63,65Cu nuclear quadrupole resonance (NQR) measurements. La substitution introduced for charge compensation, as well as Ni doping, severely distorts the electric field gradient at the copper sites inducing extra 63,65Cu NQR peaks other than the main peaks, for both the plane and the chain sites. 63,65Cu NQR linewidths for the plane site increased significantly whereas those for the chain site remained similar. Furthermore, both the spin-lattice and the spin-spin relaxation times for the plane copper decreased whereas those for the chain copper increased. The Ni substitutional effects on linewidths and relaxation times confirm that Ni carrying a local moment substitutes for the plane copper.

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^63,65Cu nuclear quadrupole resonance study of Ni-doped YBa₂Cu₃O₇

Abstract

ASJC Scopus subject areas

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