Appearance of ferromagnetism in f.c.c. solid solutions of binary and ternary Fe-Cu-based systems prepared by mechanical alloying technique

Citation
H. Ino et al., Appearance of ferromagnetism in f.c.c. solid solutions of binary and ternary Fe-Cu-based systems prepared by mechanical alloying technique, MAT SCI E A, 304, 2001, pp. 972-974
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
0921-5093 → ACNP
Volume
304
Year of publication
2001
Pages
972 - 974
Database
ISI
SICI code
0921-5093(20010531)304:<972:AOFIFS>2.0.ZU;2-R
Abstract
The ferromagnetic f.c.c. solid solutions are formed by mechanical alloy-iug in the Fe-Cu binary systems containing less than 60% of iron. The Curie te mperature of the alloy decreases with decreasing iron concentration. The ex pansion of average atomic volume of the alloys is about 1.6% of pure copper and 5.3% of f.c.c, gamma -iron regardless of copper content except for dil ute iron alloys. It is suggested from the present work that the ferromagnet ism in the Fe-Cu alloys originates when the atomic volume is expanded by a certain value (5,3% of gamma -iron is enough), and when a certain number of neighboring iron atoms exist to percolate the ferromnenetic interaction an d possibly ti, generate the magnetic moment of iron. In the studies of tern ary systems silver atoms hardly dissolved in Fe-Cu solution, whereas gold a toms formed solid solution. (C) 2001 Elsevier Science B.V, All rights reser ved.