Magnetic correlations in gamma-Mn and a Mn-10 at%Cu alloy
UNSPECIFIED (1998) Magnetic correlations in gamma-Mn and a Mn-10 at%Cu alloy. In: International Conference on Magnetism, CAIRNS, AUSTRALIA, JUL 27-AUG 01, 1997. Published in: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 177 (Part 2). pp. 1399-1400.Full text not available from this repository.
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|
|Official Date:||January 1998|
|Number of Pages:||2|
|Page Range:||pp. 1399-1400|
|Title of Event:||International Conference on Magnetism|
|Location of Event:||CAIRNS, AUSTRALIA|
|Date(s) of Event:||JUL 27-AUG 01, 1997|
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