Charge modulation in La1.67Sr0.33NiO4: A bulk thermodynamic study

被引：54

作者：

Ramirez, AP ^{[1
]}

Gammel, PL ^{[1
]}

Cheong, SW ^{[1
]}

Bishop, DJ ^{[1
]}

Chandra, P ^{[1
]}

机构：

[1] NEC RES INST,PRINCETON,NJ 08540

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.76.447

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present ultrasonic (v) and specific heat (c(p)) measurements performed on La1.67Sr0.33NiO4 to confirm and characterize the nature of the thermodynamic transition observed at T-c = 240 K in this material. The behavior of v(T similar to T-c) suggests that this transition is not due to the long-range ordering of the uncompensated nickel spins. The possibility of independent hole-spin behavior is consistent with the observed entropy and measured anomalies in the resistivity, susceptibility, and ultrasound. A comparison of v(T) and c(p)(T) suggests that the sound couples primarily to the order parameter energy.

引用

页码：447 / 450

页数：4

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