New orthorhombic derivative of CaCu5-type structure: RNi4Si compounds (R = Y, La, Ce, Sm, Gd-Ho), crystal structure and some magnetic properties

被引：32

作者：

Morozkin, A. V. ^{[1
]}

Knotko, A. V. ^{[1
]}

Yapaskurt, V. O. ^{[2
]}

Yuan, Fang ^{[3
]}

Mozharivskyj, Y. ^{[3
]}

Nirmala, R. ^{[4
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119992, Russia

[2] Moscow MV Lomonosov State Univ, Dept Petrol, Geol Fac, Moscow 119992, Russia

[3] McMaster Univ, Dept Chem & Chem Biol, Hamilton, ON L8S 4M1, Canada

[4] Indian Inst Technol, Madras 600036, Tamil Nadu, India

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2013年 / 208卷

关键词：

Rare-earth compounds; Crystal structure; Magnetic properties; Magnetocaloric effect; KONDO-LATTICE; GD-5(SI2GE2);

D O I：

10.1016/j.jssc.2013.09.036

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The crystal structure of new YNi4Si-type RNi4Si (R=Y, La, Ce, Sm, Gd Ho) compounds has been established using powder X-ray diffraction. The YNi4Si structure is a new structure type, which is orthorhombic derivative of CaCu5-type structure (space group Cmmm N 65, oC12). GdNi4Si and DyNi4Si compounds order ferromagnetically at 25 and 19 K, respectively whereas YNi4Si shows antiferromagnetic nature. At 15 K, DyNi4Si shows second antiferromagnetic-like transition. The magnetic moment of GdNi4Si at 5 K in 50 kOe field is similar to 7.2 mu(B)/f.u. suggesting a completely ordered ferromagnetic state. The magnetocaloric effect of GdNi4Si is calculated in terms of isothermal magnetic entropy change and it reaches the maximum value of -12.8 J/kg K for a field change of 50 kOe near T-C similar to 25 K. (C) 2013 Elsevier Inc. All rights reserved.

引用

页码：9 / 13

页数：5