Structure and magnetic properties of MnFe1-xTixP0.77Ge0.23 compounds
The MnFe1-xTix.P0.77Ge0.23(x=0.03,0.04,0.06,0.08,0.09)compounds were prepared by high-ener-gy ball milling and powder sintering method.The results of X-ray diffraction at room temperature showed that all the compounds showed a Fe2P hexagonal structure.With the increase of Ti content,lattice parameters a and b decreased,lattice parameter c increased,and the cell volume increased.Variable temperature X-ray diffraction experiment results showed that MnFe0.94Ti0.06P0.77Ge0.23 compounds within the temperature range 305 K to 350 K in ferromagnetic to paramagnetic phase transition,the phenomenon of magnetoelastic coupling existed.The magnetic measurement results of MnFe1-xTix,P0.77Ge0.23(x=0.03,0.04,0.06,0.08,0.09)compounds showed that Curie temperature and thermal hysteresis decreased,and maximum isothermal magnetic entropy decreased with the increase of Ti content.
magnetic refrigerationX-ray diffractionvariable temperature X-ray diffractionmagnetoelastic cou-plingCurie temperature
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