MAGNETIC-PROPERTIES OF MECHANICALLY ALLOYED FE-CU

Citation
A. Hernando et al., MAGNETIC-PROPERTIES OF MECHANICALLY ALLOYED FE-CU, Journal of magnetism and magnetic materials, 124(1-2), 1993, pp. 5-8
Citations number
6
Categorie Soggetti
Material Science","Physics, Condensed Matter
ISSN journal
03048853
Volume
124
Issue
1-2
Year of publication
1993
Pages
5 - 8
Database
ISI
SICI code
0304-8853(1993)124:1-2<5:MOMAF>2.0.ZU;2-O
Abstract
Magnetic properties of equiatomic FeCu alloys, obtained by mechanical alloying, were measured in a temperature range between 5 and 300K. The as-milled sample consists of a metastable fcc FeCu phase with a tempe rature dependence of magnetization which follows a T3/2 law. This meta stable phase decomposes into Cu and Fe phases with annealing. After an nealing at 820K, the magnetization value at low temperature is 30% sma ller than the unannealed state. The Mossbauer spectrum obtained at roo m temperature shows a paramagnetic Fe phase with a relative resonant a rea of 30%. These results suggest that after this annealing process 30 % of the iron is not in the ferromagnetic alpha phase but in a non-mag netic state (with vanishing atomic magnetic moment) or probably formin g an antiferromagnetic gamma-Fe phase (which is paramagnetic at room t emperature).