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http://dx.doi.org/10.4283/JKMS.2007.17.1.026

Mössbauer Study on Crystallographic and Magnetic Properties of Mechanical Alloying Fe-M(M=Cr, Mn, Cu, Zn) Powders  

Park, Jae-Yoon (Department of Materials Science and Engineering, Incheon University)
Choi, Jae-Joo (Department of Materials Science and Engineering, Incheon University)
Publication Information
Journal of the Korean Magnetics Society / v.17, no.1, 2007 , pp. 26-29 More about this Journal
Abstract
Fe-based powders, Fe-M(M=Cr, Mn, Cu, Zn), were prepared in Ar gas by mechanical alloying and their crystallographic and magnetic properties were investigated. X-ray diffraction indicates that the cubic lattice parameter increases for the M substitution. The distance of closest approach around M can explained the increase of lattice constant in Fe-M powders. $M\"{o}ssbauer$ spectroscopy measurements on Fe-M samples indicates the coexistence of ferromagnetic phases and paramagnetic phase that are created by the distribution of local environment M on Fe atom. On the other hand, The spread of line-width on $M\"{o}ssbauer$ spectra can be explained by the distribution of hyperfine magnetic fields. The results of quadrupole shift and isomer shift revealed that M substitutions in Fe-M powders didn't change both structure and the local charge distribution around Fe atom severely.
Keywords
mechanical alloying; $M\"{o}ssbauer$; hyperfine magnetic field; atomic distribution;
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