TY - JOUR
T1 - Changes in the spin-glass state and the atomic structure on annealing the amorphous Y-Fe alloys
AU - Suzuki, T.
AU - Fujita, A.
AU - Fukamichi, K.
AU - Aruga-Katori, H.
AU - Goto, T.
AU - Hashikura, M.
AU - Matsubara, E.
AU - Waseda, Y.
PY - 1996/3/25
Y1 - 1996/3/25
N2 - Annealed amorphous YxFe100-x alloys have been investigated by means of AC magnetic susceptibility measurement and x-ray diffraction analysis. The amorphous YxFe100-x (x = 15, 16, 20, 25 and 30) alloys annealed at 523 K for 180 min exhibit re-entrant spin-glass behaviour, while a direct transition from a paramagnetic to a spin-glass phase occurs in the amorphous alloys with x = 7.5, 10 and 33.3. For the amorphous Y20Fe80 alloy, the Curie temperature and the magnetic moment increase, but the spin freezing temperature decreases on annealing. The magnetic phase diagram for the amorphous Y-Fe alloy system in the annealed state is similar to that for many other amorphous Fe-based alloy systems in the as-prepared state. Increases in the atomic distance of Fe-Fe pairs and in the coordination number of the nearest-neighbour Fe atoms on annealing have been observed. These structural changes explain the changes in the magnetic properties for annealed amorphous alloys.
AB - Annealed amorphous YxFe100-x alloys have been investigated by means of AC magnetic susceptibility measurement and x-ray diffraction analysis. The amorphous YxFe100-x (x = 15, 16, 20, 25 and 30) alloys annealed at 523 K for 180 min exhibit re-entrant spin-glass behaviour, while a direct transition from a paramagnetic to a spin-glass phase occurs in the amorphous alloys with x = 7.5, 10 and 33.3. For the amorphous Y20Fe80 alloy, the Curie temperature and the magnetic moment increase, but the spin freezing temperature decreases on annealing. The magnetic phase diagram for the amorphous Y-Fe alloy system in the annealed state is similar to that for many other amorphous Fe-based alloy systems in the as-prepared state. Increases in the atomic distance of Fe-Fe pairs and in the coordination number of the nearest-neighbour Fe atoms on annealing have been observed. These structural changes explain the changes in the magnetic properties for annealed amorphous alloys.
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U2 - 10.1088/0953-8984/8/13/013
DO - 10.1088/0953-8984/8/13/013
M3 - Article
AN - SCOPUS:0346890393
VL - 8
SP - 2219
EP - 2231
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 13
ER -