ISSN:
1572-9540
Keywords:
mechanical alloying
;
disordered alloys
;
magnetic properties
;
Mössbauer
;
spin-glass
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Samples of nominal composition Fe0.9-xMn0.1Alx (0.1 ⩽ x ⩽ 0.5) were prepared by mechanical alloying starting from pure elements. Milling times of 24, 72 and 144 h were considered. The magnetic properties of the samples were studied by using 57Fe Mössbauer spectroscopy, vibrating sample magnetometry and magnetic susceptibility measurements. The phase distribution was determined from X-ray diffractometry. The so obtained results evidence a strong dependence on the milling time and Al concentration of the room-temperature hyperfine field distributions and coercive forces. The susceptibility measurements in the range of temperature between 10 K and 180 K suggest the occurrence of different types of transitions as the temperature is increased: (a) from a ferromagnetic to a paramagnetic phase, (b) from a reentrant spin-glass phase to a ferromagnetic one and (c) from spin-glass to a paramagnetic phase. These transitions are also strongly influenced by the milling time and the Al concentration.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1012614226942
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