UNSPECIFIED (1998) Magnetic correlations in gamma-Mn and a Mn-10 at%Cu alloy. In: International Conference on Magnetism, JUL 27-AUG 01, 1997, CAIRNS, AUSTRALIA.

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Abstract

We have carried out first-principles calculations of the paramagnetic susceptibilities of gamma-Mn and a Mn-10 at%Cu solid solution in which the paramagnetic state is modelled in terms of fluctuating 'local moments'. We find that both systems exhibit clear antiferromagnetic correlations. These an significantly stronger in the alloy. We show that this is caused by Cu impurity states reducing the dispersion of some Mn d-states. This increases the magnitude of the Mn local moments which interact antiferromagnetically. The Neel temperature of the gamma-Mn is found to be 267 K, whereas that of Mn-10 at%Cu is 382 K. (C) 1998 Elsevier Science B.V. All rights reserved.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics
Journal or Publication Title:	JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0304-8853
Date:	January 1998
Volume:	177
Number:	Part 2
Number of Pages:	2
Page Range:	pp. 1399-1400
Publication Status:	Published
Title of Event:	International Conference on Magnetism
Location of Event:	CAIRNS, AUSTRALIA
Date(s) of Event:	JUL 27-AUG 01, 1997
URI:	http://wrap.warwick.ac.uk/id/eprint/15964

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