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Type: Artigo de periódico
Title: Magnetic characterization of Mn(5)SiB(2) and Mn(5)Si(3) phases
Author: ALMEIDA, Daniel Martins de
NUNES, Carlos Angelo
COELHO, Adelino A.
COELHO, Gilberto Carvalho
Abstract: In this work the Mn(5)Si(3) and Mn(5)SiB(2) phases were produced via arc melting and heat treatment at 1000 degrees C for 50 h under argon. A detailed microstructure characterization indicated the formation of single-phase Mn(5)Si(3) and near single-phase Mn(5)SiB(2) microstructures. The magnetic behavior of the Mn(5)Si(3) phase was investigated and the results are in agreement with previous data from the literature, which indicates the existence of two anti-ferromagnetic structures for temperatures below 98 K. The Mn(5)SiB(2) phase shows a ferromagnetic behavior presenting a saturation magnetization M(s) of about 5.35 x 10(5) A/m (0.67 T) at room temperature and an estimated Curie temperature between 470 and 490 K. In addition, AC susceptibility data indicates no evidence of any other magnetic ordering in 4-300 K temperature range. The magnetization values are smaller than that calculated using the magnetic moment from previous literature NMR results. This result suggests a probable ferrimagnetic arrangement of the Mn moments. (C) 2009 Elsevier B. V. All rights reserved.
Subject: Mn(5)SiB(2)
Magnetic property
Country: Holanda
Citation: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.321, n.17, p.2578-2581, 2009
Rights: fechado
Identifier DOI: 10.1016/j.jmmm.2009.03.067
Date Issue: 2009
Appears in Collections:IFGW - Artigos e Materiais de Revistas Científicas

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