Magnetic Properties and Mossabauer Investigations of Fe-Ga Alloys

概要

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The lattice parameters of the α-phase (disordered bcc), the metastable α''-phase (Fe_3Al type) and the stable β-phase (Cu_3Au type) in the Fe-Ga system containing 15∼30% Ga were determined and a phase diagram is proposed according to X-ray and magnetic measurements. The magnetic properties of these phases were investigated between 4.2 K and 1100 K. The magnetic moment per Fe atom was found to be 2.05±0.06μB and 2.39±0.06μB for the ordered bcc and the ordered fcc Fe_3Ga respectively. Mossbauer measurements on the α'' and β phases were carried out and the internal fields were estimated to be 274 kOe for the fcc Fe_3Ga and 230 and 360 kOe for the A and D sites respectively of the bcc Fe_3Al-type Fe_3Ga. Large quadrupole interactions were found in the fcc Fe_3Ga and its spin direction is suggested to be along <100>. Some discussions are given in the last section.
社団法人日本物理学会の論文
1972-11-05