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Type: Artigo de periódico
Title: Crystal Structure And Low Temperature Physical Properties Of Ho2 Co Ga8 Intermetallic Antiferromagnet
Author: Adriano C.
Mendona-Ferreira L.
Bittar E.M.
Pagliuso P.G.
Abstract: We have synthesized single crystalline samples of Ho2 Co Ga8 intermetallic compound using a Ga-flux method. This compound crystallizes with a tetragonal structure, space group P4mmm, and lattice parameters a=4.219 (5) Å and c=10.99 (2) Å. This structure is a bilayer version of the HoCo Ga5 (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 Ho2 Co Ga8 is a metallic Curie-Weiss paramagnet at high temperature and presents an antiferromagnetic ordering below TN ∼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. © 2008 American Institute of Physics.
Rights: aberto
Identifier DOI: 10.1063/1.2830801
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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