Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 310, Issue 2, Pages 1820-1822Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2006.10.582
Keywords
ferromagnetism; micto-magnetism; beta-Mn structure; neutron diffraction
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We have found that the beta-Mn phase in the ternary Mn-Co-Zn alloy system is stable in a very wide composition range, and conducted magnetization measurements, and X-ray and neutron diffraction experiments. We confirmed that the beta-CoZn and the beta-Mn24Co36Zn40 alloys show a typical ferromagnetism with the Curie temperatures being 460 and 201 K, respectively. It is determined by Rietveld analysis for neutron data that the 8c site is entirely occupied by Co atoms, the 12d site by Zn and the remaining Co atoms, and the magnetic moment mu = 1.35 mu(B)/Co atom for the former alloy, and the 8c site is entirely occupied by Co and Mn atoms, the 12d site by Zn and the remaining Mn atoms, and the average magnetic moment mu = 0.76 mu(B)/(Mn or Co) atom for the latter alloy. The more Mn rich beta-Mn42Co28Zn30 alloy shows a micto-magnetic behavior, and has no long range magnetic order. (c) 2006 Published by Elsevier B.V.
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