TY - JOUR

T1 - Spin-gap behavior in underdop

T2 - and NMR studies

AU - Magishi, K.

AU - Kitaoka, Y.

AU - Zheng, G.

AU - Asayama, K.

AU - Kondo, T.

AU - Shimakawa, Y.

AU - Manako, T.

AU - Kubo, Y.

N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.

PY - 1996

Y1 - 1996

N2 - Measurements of the Knight shift of (Formula presented) and the nuclear spin-lattice relaxation rate of (Formula presented), (Formula presented)(1/(Formula presented)), have revealed that (Formula presented)((Formula presented)(Formula presented))(Formula presented)(Formula presented) with (Formula presented) = 40 K consisting of the bi-(Formula presented) layer without the CuO chain is in the underdoped regime with the spin pseudogap, which is evidenced by the significant decrease of (Formula presented)(1/(Formula presented)T) below 120 K far above (Formula presented) and the decrease of the (Formula presented) spin Knight shift upon cooling. Although the disorder is introduced into the adjacent Ca layers to the (Formula presented) plane by the substitution of Lu for Ca sites, the spin-gap behavior is presented not to be masked. From this result, it is suggested that the absence of the spin-gap behavior in (Formula presented)(Formula presented)(Formula presented) is neither due to the disorder introduced into the adjacent LaO layers to the (Formula presented) plane by the substitution of Sr for La sites nor the absence of the CuO chain.

AB - Measurements of the Knight shift of (Formula presented) and the nuclear spin-lattice relaxation rate of (Formula presented), (Formula presented)(1/(Formula presented)), have revealed that (Formula presented)((Formula presented)(Formula presented))(Formula presented)(Formula presented) with (Formula presented) = 40 K consisting of the bi-(Formula presented) layer without the CuO chain is in the underdoped regime with the spin pseudogap, which is evidenced by the significant decrease of (Formula presented)(1/(Formula presented)T) below 120 K far above (Formula presented) and the decrease of the (Formula presented) spin Knight shift upon cooling. Although the disorder is introduced into the adjacent Ca layers to the (Formula presented) plane by the substitution of Lu for Ca sites, the spin-gap behavior is presented not to be masked. From this result, it is suggested that the absence of the spin-gap behavior in (Formula presented)(Formula presented)(Formula presented) is neither due to the disorder introduced into the adjacent LaO layers to the (Formula presented) plane by the substitution of Sr for La sites nor the absence of the CuO chain.

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U2 - 10.1103/PhysRevB.54.3070

DO - 10.1103/PhysRevB.54.3070

M3 - Article

AN - SCOPUS:0041963645

VL - 54

SP - 3070

EP - 3073

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 5

ER -