NDLI: Mössbauer spectroscopy and X-ray diffraction study of FexMn0:70−xAl0:30 (0:40 < x < 0:70) alloys prepared by mechanical alloying

Content Provider	Springer Nature Link
Author	Rico Castro, M.M. Medina Barreto, M.H. Pérez Alcázar, G.A.
Copyright Year	2000
Abstract	In order to study the structural and magnetic behaviour of FexMn0.70−xAl0.30 (0.40≤x≤0.70) alloys prepared by mechanical alloying, Mössbauer spectroscopy and X‐ray diffraction techniques have been employed. All the alloys were prepared in 24 h and, in addition, for x=0.45 milling times of 4, 8, 12, 16 and 24 h were considered. X‐ray diffraction showed that all samples exhibit bcc‐type reflections. A slight decrease in grain size and a slight increase in lattice parameter with increasing Mn content were observed. For x=0.45, an increase in grain size with milling time has been evidenced. For this composition and 4 h of milling, the more intensive peak (1 1 0) was fitted with three peaks corresponding to that of Mn, Fe and the alloy, respectively. For 12 h milling only bcc peaks of the alloy were obtained. As the Fe concentration was increased beyond x=0.50, a phase change from paramagnetic to ferromagnetic, as well as an increment in the mean hyperfine field with x, was detected. For x=0.45 and 4 h of milling we registered the presence of both a single line, corresponding to the alloy, and a hyperfine field distribution with peaks in 27.5 and 23 T, as well as peaks at lesser fields. These peaks are associated to Fe sites with two or more Al and/or Mn atoms as next neighbours. These results are in agreement with those obtained by X‐ray diffraction.
Starting Page	503
Ending Page	510
Page Count	8
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	128
Issue Number	4
e-ISSN	15729540
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2000-01-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Nuclear Physics, Heavy Ions, Hadrons Atoms, Molecules, Clusters and Plasmas Condensed Matter Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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