Tl, Cu-NMR study on high-Tc cuprate TlBa2Y1-xCaxCu2O7

Y. Kunii; T. Suzuki; A. Kakishima; T. Goto; S. Nakajima; T. Fukase

doi:10.1016/S0921-4534(02)02416-4

Tl, Cu-NMR study on high-T_c cuprate TlBa₂Y_1-xCa_xCu₂O₇

Y. Kunii, T. Suzuki, A. Kakishima, T. Goto, S. Nakajima, T. Fukase

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

Tl, Cu-NMR study has been performed on the high-T_c cuprate, TlBa₂Y_1-xCa_xCu₂O₇ with wide range hole concentration from the antiferromagnetic (x = 0) to the slightly overdoped (x = 1.0). For superconducting samples (x = 0.6-1.0) the local spin susceptibility (K_S) at Cu-site stayed constant around room temperature, and starts slight a decrease from 160 K, which is higher than T_c. This T-dependence is what has been reported in other high-T_c cuprates in overdoped region. (T₁T)^-1 at Tl-site for every superconducting sample, which obeys Curie-Weiss law at high temperature, showed a significant reduction from T_SG (> T_c), suggesting the existence of spin-gap even in slightly overdoped region.

Original language	English
Pages (from-to)	257-258
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	388-389
DOIs	https://doi.org/10.1016/S0921-4534(02)02416-4
Publication status	Published - 2003 May
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 2002 Aug 20 → 2002 Aug 27

Keywords

High-T cuprate
NMR
Spin-gap

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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@article{dc264aa718294701b2425822bd8e1019,

title = "Tl, Cu-NMR study on high-Tc cuprate TlBa2Y1-xCaxCu2O7",

abstract = "Tl, Cu-NMR study has been performed on the high-Tc cuprate, TlBa2Y1-xCaxCu2O7 with wide range hole concentration from the antiferromagnetic (x = 0) to the slightly overdoped (x = 1.0). For superconducting samples (x = 0.6-1.0) the local spin susceptibility (KS) at Cu-site stayed constant around room temperature, and starts slight a decrease from 160 K, which is higher than Tc. This T-dependence is what has been reported in other high-Tc cuprates in overdoped region. (T1T)-1 at Tl-site for every superconducting sample, which obeys Curie-Weiss law at high temperature, showed a significant reduction from TSG (> Tc), suggesting the existence of spin-gap even in slightly overdoped region.",

keywords = "High-T cuprate, NMR, Spin-gap",

author = "Y. Kunii and T. Suzuki and A. Kakishima and T. Goto and S. Nakajima and T. Fukase",

note = "Funding Information: This research was partially supported of the Toray Science Foundation, and by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid.; proceedings of the 23rd international conference on low temper ; Conference date: 20-08-2002 Through 27-08-2002",

year = "2003",

month = may,

doi = "10.1016/S0921-4534(02)02416-4",

language = "English",

volume = "388-389",

pages = "257--258",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

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TY - JOUR

T1 - Tl, Cu-NMR study on high-Tc cuprate TlBa2Y1-xCaxCu2O7

AU - Kunii, Y.

AU - Suzuki, T.

AU - Kakishima, A.

AU - Goto, T.

AU - Nakajima, S.

AU - Fukase, T.

N1 - Funding Information: This research was partially supported of the Toray Science Foundation, and by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid.

PY - 2003/5

Y1 - 2003/5

N2 - Tl, Cu-NMR study has been performed on the high-Tc cuprate, TlBa2Y1-xCaxCu2O7 with wide range hole concentration from the antiferromagnetic (x = 0) to the slightly overdoped (x = 1.0). For superconducting samples (x = 0.6-1.0) the local spin susceptibility (KS) at Cu-site stayed constant around room temperature, and starts slight a decrease from 160 K, which is higher than Tc. This T-dependence is what has been reported in other high-Tc cuprates in overdoped region. (T1T)-1 at Tl-site for every superconducting sample, which obeys Curie-Weiss law at high temperature, showed a significant reduction from TSG (> Tc), suggesting the existence of spin-gap even in slightly overdoped region.

AB - Tl, Cu-NMR study has been performed on the high-Tc cuprate, TlBa2Y1-xCaxCu2O7 with wide range hole concentration from the antiferromagnetic (x = 0) to the slightly overdoped (x = 1.0). For superconducting samples (x = 0.6-1.0) the local spin susceptibility (KS) at Cu-site stayed constant around room temperature, and starts slight a decrease from 160 K, which is higher than Tc. This T-dependence is what has been reported in other high-Tc cuprates in overdoped region. (T1T)-1 at Tl-site for every superconducting sample, which obeys Curie-Weiss law at high temperature, showed a significant reduction from TSG (> Tc), suggesting the existence of spin-gap even in slightly overdoped region.

KW - High-T cuprate

KW - NMR

KW - Spin-gap

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U2 - 10.1016/S0921-4534(02)02416-4

DO - 10.1016/S0921-4534(02)02416-4

M3 - Conference article

AN - SCOPUS:0037850717

VL - 388-389

SP - 257

EP - 258

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

T2 - proceedings of the 23rd international conference on low temper

Y2 - 20 August 2002 through 27 August 2002

ER -