MAGNETIC PROPERTIES OF BALL MILLED FexCu1-x (x=0.4, 0.5) ALLOY
Wang Wang-chena, Xiong Cao-shuia, Shen Bao-genb, Li Yu-zhic, Lin leic
a Department of physics, University of Science and Technology of China, Hefei 230026, China; b Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; c Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China
Abstract The samples Fe0.4Cu0.6 and Fe0.5Cu0.5 ball milled for 50 h are investigated by X-ray diffraction, M?ssbauer spectra, as well as magnetic measurement. The experiments show that the structure of the samples is fcc, with lattice constant 0.361 nm and there are fcc Fe-rich phase and fcc Cu-rich phase in the samples. Most of Fe atoms (91%) are in the fcc Fe-rich phase, which is a ferromagnetic phase. The M-H curve at 1.5 K shows the saturation magnetization of the samples are 80.5 emu/g and 101.6 emu/g for Fe0.4Cu0.6 and Fe0.5Cu0.5 respectively. The average magnetic moment of Fe atoms is deduced to be 2.40 μB . Compared with theoretical predication, the Fe atoms in the fcc phase are in high spin state.
Received: 19 October 1999
Published: 12 June 2005
(Saturation moments and magnetic susceptibilities)