Magnetic properties of RCo5-based systems

被引：16

作者：

Burzo, E. ^{[1
]}

Vlaic, P. ^{[2
]}

Creanga, I. ^{[3
]}

机构：

[1] Univ Babes Bolyai, Fac Phys, Cluj Napoca 400084, Romania

[2] Univ Med & Pharm Iulius Hateganu, Cluj Napoca, Romania

[3] Tech Univ, Dept Phys, Bucharest, Romania

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 33期

关键词：

Rare-earth compounds; Band structure; Magnetic properties; Spin fluctuations; EXCHANGE INTERACTIONS; ELECTRONIC-PROPERTIES; COMPOUNDS R; BEHAVIOR; CO; CRYSTALLINE; DIFFRACTION; NI;

D O I：

10.1016/j.jallcom.2011.05.057

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Band structure calculations and magnetic measurements were performed on (GdxY1-x) Co4Si as well as on YCo4M compounds, where M = Ga, Al, and Co. The substitutions both at rare-earth and cobalt sites influence strongly the cobalt moments as well as the Curie temperatures. When Y is replaced by Gd, in GdxY1-xCo4Si system, the mean cobalt moments increase from 0.73 mu(B)/atom to 1.25 mu(B)/atom. The computed magnetic moments per formula unit agree rather well with experimental data. The reciprocal susceptibilities for ferrimagnetic compounds show non-linear temperature dependences. The effective cobalt moments are little dependent on composition. The ratio r between the mean number of cobalt spins determined from effective and saturation cobalt moments, respectively follows a dependence on Curie temperature of the form r alpha T-c(-2/3). The magnetic behaviour of cobalt is analysed in spin fluctuations model. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：8289 / 8294

页数：6

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