139La NQR study of electronic states in metallic compounds (La1-xSrxCuO4

Tatsuo Kobayashi; Shinji Wada; Yoshio Kitaoka; Kunisuke Asayama; Kiichi Amaya

doi:10.1143/JPSJ.58.779

¹³⁹La NQR study of electronic states in metallic compounds (La_1-xSr_xCuO₄

Tatsuo Kobayashi, Shinji Wada, Yoshio Kitaoka, Kunisuke Asayama, Kiichi Amaya

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

10 Citations (Scopus)

Abstract

We measured the temperature dependence of the nuclear spin-lattice relaxation time T_x of ¹³⁹La in metallic compounds (La_1-xSr_x)₂CuO₄ with x=0.045, 0.075, 0.10 (high-T_c superconductors) and x=0.15 (nonsuperconductor) by NQR experimentation. T₁ for x=0.15 was found to conform to the Korringa relation (T¹T= const.) sufficiently, while the T₁ for x=0.075 and 0.10 in the normal state showed slightly stronger temperature dependence and were shorter than that for x=0.15, in spite of the increase of hole concentration with increasing x. Fluctuations of Cu d-spins are considered to play an important role for T₁ in superconducting compounds. The relaxation behavior in the compound with x=0.045 is also discussed.

Original language	English
Pages (from-to)	779-782
Number of pages	4
Journal	journal of the physical society of japan
Volume	58
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.58.779
Publication status	Published - 1989
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.58.779

Cite this

@article{07d2167e15fa47039fa81ba192ca5e13,

title = "139La NQR study of electronic states in metallic compounds (La1-xSrxCuO4 ",

abstract = "We measured the temperature dependence of the nuclear spin-lattice relaxation time Tx of 139La in metallic compounds (La1-xSrx)2CuO4 with x=0.045, 0.075, 0.10 (high-Tc superconductors) and x=0.15 (nonsuperconductor) by NQR experimentation. T1 for x=0.15 was found to conform to the Korringa relation (T1T= const.) sufficiently, while the T1 for x=0.075 and 0.10 in the normal state showed slightly stronger temperature dependence and were shorter than that for x=0.15, in spite of the increase of hole concentration with increasing x. Fluctuations of Cu d-spins are considered to play an important role for T1 in superconducting compounds. The relaxation behavior in the compound with x=0.045 is also discussed.",

author = "Tatsuo Kobayashi and Shinji Wada and Yoshio Kitaoka and Kunisuke Asayama and Kiichi Amaya",

year = "1989",

doi = "10.1143/JPSJ.58.779",

language = "English",

volume = "58",

pages = "779--782",

journal = "journal of the physical society of japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "3",

}

TY - JOUR

T1 - 139La NQR study of electronic states in metallic compounds (La1-xSrxCuO4

AU - Kobayashi, Tatsuo

AU - Wada, Shinji

AU - Kitaoka, Yoshio

AU - Asayama, Kunisuke

AU - Amaya, Kiichi

PY - 1989

Y1 - 1989

N2 - We measured the temperature dependence of the nuclear spin-lattice relaxation time Tx of 139La in metallic compounds (La1-xSrx)2CuO4 with x=0.045, 0.075, 0.10 (high-Tc superconductors) and x=0.15 (nonsuperconductor) by NQR experimentation. T1 for x=0.15 was found to conform to the Korringa relation (T1T= const.) sufficiently, while the T1 for x=0.075 and 0.10 in the normal state showed slightly stronger temperature dependence and were shorter than that for x=0.15, in spite of the increase of hole concentration with increasing x. Fluctuations of Cu d-spins are considered to play an important role for T1 in superconducting compounds. The relaxation behavior in the compound with x=0.045 is also discussed.

AB - We measured the temperature dependence of the nuclear spin-lattice relaxation time Tx of 139La in metallic compounds (La1-xSrx)2CuO4 with x=0.045, 0.075, 0.10 (high-Tc superconductors) and x=0.15 (nonsuperconductor) by NQR experimentation. T1 for x=0.15 was found to conform to the Korringa relation (T1T= const.) sufficiently, while the T1 for x=0.075 and 0.10 in the normal state showed slightly stronger temperature dependence and were shorter than that for x=0.15, in spite of the increase of hole concentration with increasing x. Fluctuations of Cu d-spins are considered to play an important role for T1 in superconducting compounds. The relaxation behavior in the compound with x=0.045 is also discussed.

UR - http://www.scopus.com/inward/record.url?scp=20444363436&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=20444363436&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.58.779

DO - 10.1143/JPSJ.58.779

M3 - Article

AN - SCOPUS:20444363436

SN - 0031-9015

VL - 58

SP - 779

EP - 782

JO - journal of the physical society of japan

JF - journal of the physical society of japan

IS - 3

ER -

¹³⁹La NQR study of electronic states in metallic compounds (La_1-xSr_xCuO₄

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this