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

Research output: Contribution to journal › Article

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
Externally published	Yes

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Keywords

High-T cuprate
NMR
Spin-gap

ASJC Scopus subject areas

Condensed Matter Physics

Cite this

Kunii, Y., Suzuki, T., Kakishima, A., Goto, T., Nakajima, S., & Fukase, T. (2003). Tl, Cu-NMR study on high-T_c cuprate TlBa₂Y_1-xCa_xCu₂O₇. Physica C: Superconductivity and its Applications, 388-389, 257-258. https://doi.org/10.1016/S0921-4534(02)02416-4

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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.",

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

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AU - Kunii, Y.

AU - Suzuki, T.

AU - Kakishima, A.

AU - Goto, T.

AU - Nakajima, S.

AU - Fukase, T.

PY - 2003/5

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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.

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Access to Document

10.1016/S0921-4534(02)02416-4