Disorder trapping in gas quenched magnetostrictive Fe-Ga alloys

作者：Basumatary Himalay; Palit Mithun; Chelvane J Arout; Pandian S^*

来源：Materials Science and Engineering B-Solid State Materials for Advanced Technology, 2010, 167(3): 210-213.

DOI：10.1016/j.mseb.2010.02.021

• Magnetostriction
• Structural ordering
• Quenching
• Mossbauer studies

The structural and magnetic properties of Fe(100-x)Ga(x) (x = 17, 20, 23, 25, 27 and 30) in heat treated (950 degrees C/10 h) and quenched condition were studied. While the X-ray diffraction patterns and the microstructures indicate that all the alloys contain only the disordered alpha-Fe (A2 phase), whereas, the Mossbauer spectra reveal that the alloys with x >= 25 contain minor fractions of ordered L1(2) and DO(3) phases. The room temperature saturation magnetostriction increases for the initial concentrations of Ga (x = 17-23) and then decreases for higher concentrations. The effect of quenching in suppressing the formation of ordered phases (L1(2) and DO(3)) and in retaining the high temperature disordered (A2) phase is attributed to be the main reason for the increase in the magnetostriction due to Ga addition.

• 出版日期2010-3-25