SUPERCONDUCTING TRANSITION-TEMPERATURE AND CU SPIN MOMENTS OBSERVED BY THE NUCLEAR HEAT-CAPACITY IN LA2-XMXCUO4 (M=SR AND BA)

被引：21

作者：

WADA, N ^{[1
]}

NAKAMURA, Y ^{[1
]}

KUMAGAI, K ^{[1
]}

机构：

[1] HOKKAIDO UNIV,FAC SCI,SAPPORO,HOKKAIDO 060,JAPAN

来源：

PHYSICA C | 1991年 / 185卷

关键词：

D O I：

10.1016/0921-4534(91)91812-I

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnitude SBAR of onsite Cu magnetic spin and temperature linear term gamma-T for La2-x(Sr,Ba)xCuO4 have been determined as a function of x by measuring the low temperature heat capacity below 1 K down to about 70 mK. At the insulator-superconductor boundary of both La-Sr and La-Ba systems, SBAR is about 0.4-mu-B that is about a half of the magnetic moment at x = 0. SBAR of La-Sr superconductor decreases with increasing x. The La-Ba system, however, shows a maximum of SBAR 0.25-mu-B and also shows a minimum of the electronic heat capacity at x approximately 0.12 where a conspicuous dip in T(c)-x phase diagram was observed.

引用

页码：1177 / 1178

页数：2

共 6 条

[1] STRONG DEPENDENCE OF THE LINEAR-TEMPERATURE TERM OF HEAT-CAPACITY ON BA-DOPING AND SR-DOPING IN THE LA2CUO4 SYSTEM
KUMAGAI, K
NAKAMURA, Y
WATANABE, I
NAKAMICHI, Y
NAKAJIMA, H
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1988, 76-7 : 601 - 603
[2] PHYLLIPS JC, UNPUB
[3] OBSERVATION OF NUCLEAR-RESONANCE OF CU IN ANTIFERROMAGNETIC LA2CUO4-DELTA AND CUO
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[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1988, 57 (09) : 2908 - 2911
[4] OBSERVATION OF STATIC MAGNETIC-MOMENT ON THE COPPER SITE IN SUPERCONDUCTING LA2-XSRXCUO4 - THE NUCLEAR HEAT-CAPACITY MEASUREMENT
WADA, N
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NAKAMURA, Y
KUMAGAI, K
[J]. PHYSICA C, 1989, 157 (03): : 453 - 459
[5] TEMPERATURE LINEAR TERM AND JUMP AT TC IN THE HEAT-CAPACITY OF LA2-X SRXCUO4
WADA, N
OBANA, T
NAKAMURA, Y
KUMAGAI, K
[J]. PHYSICA B, 1990, 165 : 1341 - 1342
[6] DIRECT OBSERVATION OF CU SPIN MOMENTS BY THE NUCLEAR HEAT-CAPACITY IN LA2-XSRXCUO4, LA2-XBAXCUO4
WADA, N
OHSAWA, S
NAKAMURA, Y
KUMAGAI, K
[J]. PHYSICA B, 1990, 165 : 1345 - 1346

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