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

共 44 条

[21] High magnetic field study of the anisotropy and neutron diffraction investigation of the crystal and magnetic structure of YCo4.5Ge0.5 [J].

Colin, C. V. ;

Isnard, O. ;

Guillot, M. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 505 (01) :11-16

[22] The influence of substituting Si for Co on the magnetic properties of PrCo5 [J].

Coroian, N. ;

Klosek, V. ;

Isnard, O. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 427 (1-2) :5-10

[23]

COROIAN N, 2006, ROM REP PHYS, V58, P173

[24] Structural and magnetic properties of hexagonal DyCo4M compounds (M=Al, Ga) [J].

Klosek, V ;

Zlotea, C ;

Isnard, O .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2003, 15 (49) :8327-8337

[25] AL-SUBSTITUTION EFFECTS ON THE MAGNETIC-PROPERTIES OF RCO5 (R=Y, PR, ND, AND SM) [J].

KONNO, K ;

IDO, H ;

CHENG, SF ;

SANKAR, SG ;

WALLACE, WE .

JOURNAL OF APPLIED PHYSICS, 1993, 73 (10) :5929-5931

[26]

LAGUNAMARCO MA, 2008, REV REV B, V77, P125

[27] MAGNETIC-PROPERTIES OF AMORPHOUS Y-NI ALLOYS [J].

LIENARD, A ;

REBOUILLAT, JP .

JOURNAL OF APPLIED PHYSICS, 1978, 49 (03) :1680-1682

[28] The effect of silicon on the exchange interactions in GdxCe1-xCo4Si compounds [J].

Mincic, A .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (10) :1837-1847

[29] THEORY OF ITINERANT ELECTRON MAGNETISM [J].

MORIYA, T .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1991, 100 (1-3) :261-271

[30] RECENT PROGRESS IN THE THEORY OF ITINERANT ELECTRON MAGNETISM [J].

MORIYA, T .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1979, 14 (01) :1-46

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