Title :
Mossbauer spectroscopy studies in supersaturated FexCo 50-xCu50 solid solutions
Author :
Kim, Won-Tae ; Yoo, Yong-Goo ; Yu, Seong-Cho ; Agudo, P. ; Navarro, E. ; Vazquez, Manuel ; Hernando, A.
Author_Institution :
Dept. of Phys., Chongju Univ., South Korea
fDate :
9/1/1997 12:00:00 AM
Abstract :
Local structural change in mechanically alloyed FexCo 50-xCu50 (x=10, 20, 30, 40 and 50) powders has been investigated by Mossbauer spectroscopy and X-ray diffractometry at room temperature. Mossbauer spectra from mechanically alloyed Fex Co50-xCu50 samples consist of three different subspectra: a sextet, a broad sextet and a doublet corresponding to an α-Fe phase, to a disordered ferromagnetic phase of fcc solid solution, and to a non-ferromagnetic phase, respectively. With increasing processing time, the disordered ferromagnetic phase becomes dominant, indicating a formation of fcc solid solution during mechanical alloying. With increasing Co content, the hyperfine field of the disordered magnetic phase increases from about 20 to 25 T
Keywords :
Mossbauer effect; X-ray diffraction; cobalt alloys; copper alloys; crystal structure; ferromagnetic materials; hyperfine interactions; iron alloys; magnetic transitions; mechanical alloying; powder metallurgy; α-Fe phase; 20 to 25 T; Fe10Co40Cu50; Fe20Co30Cu50; Fe30Co20Cu50; Fe40Co10Cu50; Fe50Cu50; Mossbauer spectra; Mossbauer spectroscopy; X-ray diffractometry; broad sextet; disordered ferromagnetic phase; disordered magnetic phase; doublet; fcc solid solution; hyperfine field; local structural change; mechanical alloying; mechanically alloyed FexCo50-xCu50 powders; nonferromagnetic phase; room temperature; sextet; subspectra; supersaturated FexCo50-xCu50 solid solutions; Iron; Magnetic fields; Magnetic resonance; Milling; Solids; Spectroscopy; Steady-state; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
