ABRUPT BUT CONTINUOUS ANTIFERROMAGNETIC TRANSITION IN NEARLY STOICHIOMETRIC LA2CUO4+DELTA

被引：31

作者：

MACLAUGHLIN, DE

VITHAYATHIL, JP

BROM, HB

DEROOY, JCJM

HAMMEL, PC

CANFIELD, PC

REYES, AP

FISK, Z

THOMPSON, JD

CHEONG, SW

机构：

[1] LEIDEN UNIV,KAMERLINGH ONNES LAB,2300 RA LEIDEN,NETHERLANDS

[2] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.72.760

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Zero-field La-139 nuclear quadrupole resonance (NQR) has been used to characterize the antiferromagnetic transition in nearly stoichiometric single crystals of La2CuO4+6 (Neel temperatures T(N) between 275 and 318 K). The onset of the NQR Zeeman splitting at T(N) is abrupt but continuous, indicative of a second-order phase transition with either a crossover in critical behavior just below T(N) or a very small critical exponent beta less than or similar to 0.1. The absence of any anomaly at T(N) in the La-139 electric field gradient indicates no accompanying structural distortion.

引用

页码：760 / 763

页数：4

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