PHASE-SEPARATION IN A HIGH-PRESSURE-OXYGENATED LA2CUO4+DELTA CRYSTAL - EVIDENCE FROM ANISOTROPIC ELECTRONIC TRANSPORT AND MAGNETIC-SUSCEPTIBILITY

被引：79

作者：

HUNDLEY, MF ^{[1
]}

THOMPSON, JD ^{[1
]}

CHEONG, SW ^{[1
]}

FISK, Z ^{[1
]}

SCHIRBER, JE ^{[1
]}

机构：

[1] SANDIA NATL LABS,ALBUQUERQUE,NM 87185

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.41.4062

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report magnetic susceptibility, resistivity, and thermoelectric power measurements performed on a high-pressure-oxygenated La2CuO4+ single crystal. Distinct anomalies are present in all three quantities between 200 and 280 K that are attributed to a phase separation involving oxygen diffusion. Hysteresis present in the data near the phase-separation temperature indicates that the process is weakly first order. We suggest that this transition may be driven, in part, by interactions between excess oxygen ions and copper spin magnetism. © 1990 The American Physical Society.

引用

页码：4062 / 4065

页数：4

共 22 条

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