Crystal structure and low temperature physical properties of Ho2CoGa8 intermetallic antiferromagnet

被引：5

作者：

Adriano, C. ^{[1
]}

Mendonca-Ferreira, L. ^{[1
]}

Bittar, E. M. ^{[1
]}

Pagliuso, P. G. ^{[1
]}

机构：

[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazil

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 07期

关键词：

D O I：

10.1063/1.2830801

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have synthesized single crystalline samples of Ho(2)CoGa(8) intermetallic compound using a Ga-flux method. This compound crystallizes with a tetragonal structure, space group P4/mmm, and lattice parameters a=4.219(5) angstrom and c=10.99(2) angstrom. This structure is a bilayer version of the HoCoGa(5) (1-1-5) which hosts a series of heavy-fermion superconductors and complex antiferromagnetic intermetallic systems. Measurements of magnetic susceptibility, heat capacity, and electrical resistivity revealed that Ho(2)CoGa(8) is a metallic Curie-Weiss paramagnet at high temperature and presents an antiferromagnetic ordering below T(N)similar to 5 K. The low temperature magnetic properties of this compound show the effects of tetragonal crystalline electrical field and the Ruderman-Kittel-Kasuya-Yosid interactions and the results presented here are compared with a broader description of the evolution of the low-T magnetic properties of structurally related series of rare-earth based tetragonal 2-1-8 and 1-1-5 compounds. (c) 2008 American Institute of Physics.

引用

页数：3

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