Low-temperature magnetic and thermodynamic properties of Fe1-xCoxSi

被引：4

作者：

Chernikov, MA

Felder, E

Paschen, S

Bianchi, AD

Ott, HR

Sarrao, JL

Mandrus, D

Fisk, Z

机构：

[1] FLORIDA STATE UNIV,NATL HIGH MAGNET FIELD LAB,TALLAHASSEE,FL 32306

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

来源：

PHYSICA B | 1997年 / 230卷

关键词：

Fe1-xCoxSi; narrow-gap semiconductors; specific heat; magnetic susceptibility; thermodynamic properties;

D O I：

10.1016/S0921-4526(96)00841-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report measurements of the low-field AC magnetic susceptibility chi'(T,f) and of the specific heat C-p(T) for polycrystalline samples of Fe1-xCoxSi with 0 less than or equal to x less than or equal to 0.03 at low temperatures. For x greater than or equal to 0.01, the chi'(T) curves show maxima indicative of a spin-glass-type freezing of magnetic moments below 1 K. The small values of T-f/x and the T-f(f) variations both suggest a weak magnetic interaction. The specific heat C-p(T) contains a term gamma T which raises with increasing x from 2.1 T mJ mol(-1) K-1 for FeSi to 7.6 T mJ mol(-1) K-1 for Fe0.97Co0.03Si.

引用

页码：790 / 793

页数：4

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