Ni-substituted sites and the effect on Cu electron spin dynamics of YBa2Cu3-xNixO7-δ

Y. Itoh, S. Adachi, T. Machi, Yoji Ohashi, N. Koshizuka

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We report a Cu nuclear quadrupole resonance experiment on magnetic impurity Ni-substituted YBa2Cu3-xNixO7-δ. The distribution of Ni-substituted sites and its effect on the Cu electron spin dynamics are investigated. Two samples with the same Ni concentration x = 0.10 and nearly the same oxygen content but different Tc's were prepared: One is an as-synthesized sample (7-δ=6.93) in an oxygen gas (Tc≈80 K), and the other is a quenched one (7-δ= 6.92) in a reduced oxygen atmosphere (Tc≈70 K). The plane-site 63Cu(2) nuclear spin-lattice relaxation for the quenched sample was faster than that for the as-synthesized sample, in contrast to the 63Cu(1) relaxation that was faster for the as-synthesized sample. This indicates that the density of plane-site Ni(2) is higher in the quenched sample, contrary to the chain-site Ni(1) density, which is lower in the quenched sample. From the analysis in terms of the Ni-induced nuclear spin-lattice relaxation, we suggest that the primary origin of suppression of Tc is associated with the nonmagnetic depairing effect of the plane-site Ni(2).

Original languageEnglish
Article number134511
Pages (from-to)1345111-1345115
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume66
Issue number13
Publication statusPublished - 2002 Oct 1
Externally publishedYes

Fingerprint

Spin dynamics
spin dynamics
electron spin
Spin-lattice relaxation
Oxygen
Electrons
Nuclear quadrupole resonance
spin-lattice relaxation
nuclear spin
Gases
Impurities
oxygen
nuclear quadrupole resonance
Experiments
retarding
atmospheres
impurities
gases

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Ni-substituted sites and the effect on Cu electron spin dynamics of YBa2Cu3-xNixO7-δ. / Itoh, Y.; Adachi, S.; Machi, T.; Ohashi, Yoji; Koshizuka, N.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 66, No. 13, 134511, 01.10.2002, p. 1345111-1345115.

Research output: Contribution to journalArticle

@article{07a02aff4d134861a6ba49b8176d15c4,
title = "Ni-substituted sites and the effect on Cu electron spin dynamics of YBa2Cu3-xNixO7-δ",
abstract = "We report a Cu nuclear quadrupole resonance experiment on magnetic impurity Ni-substituted YBa2Cu3-xNixO7-δ. The distribution of Ni-substituted sites and its effect on the Cu electron spin dynamics are investigated. Two samples with the same Ni concentration x = 0.10 and nearly the same oxygen content but different Tc's were prepared: One is an as-synthesized sample (7-δ=6.93) in an oxygen gas (Tc≈80 K), and the other is a quenched one (7-δ= 6.92) in a reduced oxygen atmosphere (Tc≈70 K). The plane-site 63Cu(2) nuclear spin-lattice relaxation for the quenched sample was faster than that for the as-synthesized sample, in contrast to the 63Cu(1) relaxation that was faster for the as-synthesized sample. This indicates that the density of plane-site Ni(2) is higher in the quenched sample, contrary to the chain-site Ni(1) density, which is lower in the quenched sample. From the analysis in terms of the Ni-induced nuclear spin-lattice relaxation, we suggest that the primary origin of suppression of Tc is associated with the nonmagnetic depairing effect of the plane-site Ni(2).",
author = "Y. Itoh and S. Adachi and T. Machi and Yoji Ohashi and N. Koshizuka",
year = "2002",
month = "10",
day = "1",
language = "English",
volume = "66",
pages = "1345111--1345115",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "13",

}

TY - JOUR

T1 - Ni-substituted sites and the effect on Cu electron spin dynamics of YBa2Cu3-xNixO7-δ

AU - Itoh, Y.

AU - Adachi, S.

AU - Machi, T.

AU - Ohashi, Yoji

AU - Koshizuka, N.

PY - 2002/10/1

Y1 - 2002/10/1

N2 - We report a Cu nuclear quadrupole resonance experiment on magnetic impurity Ni-substituted YBa2Cu3-xNixO7-δ. The distribution of Ni-substituted sites and its effect on the Cu electron spin dynamics are investigated. Two samples with the same Ni concentration x = 0.10 and nearly the same oxygen content but different Tc's were prepared: One is an as-synthesized sample (7-δ=6.93) in an oxygen gas (Tc≈80 K), and the other is a quenched one (7-δ= 6.92) in a reduced oxygen atmosphere (Tc≈70 K). The plane-site 63Cu(2) nuclear spin-lattice relaxation for the quenched sample was faster than that for the as-synthesized sample, in contrast to the 63Cu(1) relaxation that was faster for the as-synthesized sample. This indicates that the density of plane-site Ni(2) is higher in the quenched sample, contrary to the chain-site Ni(1) density, which is lower in the quenched sample. From the analysis in terms of the Ni-induced nuclear spin-lattice relaxation, we suggest that the primary origin of suppression of Tc is associated with the nonmagnetic depairing effect of the plane-site Ni(2).

AB - We report a Cu nuclear quadrupole resonance experiment on magnetic impurity Ni-substituted YBa2Cu3-xNixO7-δ. The distribution of Ni-substituted sites and its effect on the Cu electron spin dynamics are investigated. Two samples with the same Ni concentration x = 0.10 and nearly the same oxygen content but different Tc's were prepared: One is an as-synthesized sample (7-δ=6.93) in an oxygen gas (Tc≈80 K), and the other is a quenched one (7-δ= 6.92) in a reduced oxygen atmosphere (Tc≈70 K). The plane-site 63Cu(2) nuclear spin-lattice relaxation for the quenched sample was faster than that for the as-synthesized sample, in contrast to the 63Cu(1) relaxation that was faster for the as-synthesized sample. This indicates that the density of plane-site Ni(2) is higher in the quenched sample, contrary to the chain-site Ni(1) density, which is lower in the quenched sample. From the analysis in terms of the Ni-induced nuclear spin-lattice relaxation, we suggest that the primary origin of suppression of Tc is associated with the nonmagnetic depairing effect of the plane-site Ni(2).

UR - http://www.scopus.com/inward/record.url?scp=4243964602&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243964602&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:4243964602

VL - 66

SP - 1345111

EP - 1345115

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 13

M1 - 134511

ER -