The crystallographic and magnetic properties of Co_0.9 Fe_0.1 Cr_2 S_4 have been studied by Mossbauer and x-ray measurements. The crystal structure is cubic spinel and the lattice parameter a。. It is also found that iron ions occupy only tetrahedral...
The crystallographic and magnetic properties of Co_0.9 Fe_0.1 Cr_2 S_4 have been studied by Mossbauer and x-ray measurements. The crystal structure is cubic spinel and the lattice parameter a。. It is also found that iron ions occupy only tetrahedral sites. The magnetic hyperfine field and qudrupole shift at 81K was found to be 197.8 kOe and 0.63 ㎜/s, respectively. Magnetic ordering of ferrimagnetic nature exists below the Curie temperature of 219 K. It is notable that quadrupole splitting appears below the Curie temperature and increase with decreasing temperature and asymmetric line broading in Mossbauer spectra also increases with decreasing temperature; it is suggested that these are dynamic John-Teller distortion.