Anomalies in magnetoelastic properties of DyFe11.2Nb0.8 compound

作者：Wang J L^*; Din M F Md; Kennedy S J; Cheng Z X; Campbell S J; Kimpton J A; Dou S X

来源：Journal of Applied Physics, 2015, 117(17): 17C109.

DOI：10.1063/1.4907614

The structural and magnetic properties of DyFe11.2Nb0.8 compound have been investigated by high intensity, high resolution synchrotron x-ray diffraction, ac magnetic susceptibility, and dc magnetization measurements as well as Mossbauer spectroscopy (5-300 K). The easy magnetization direction at room temperature is along the c-axis. With decreasing temperature, the magnetocrystalline anisotropy changes from easy-axis to easy-cone at T-sr2 (similar to 202 K), then to easy plane at T-sr1 (similar to 94 K). The thermal expansion coefficient obtained from the synchrotron x-ray study exhibits clear anomalies around both of the spin reorientation transition temperatures. The Fe-57 hyperfine interaction parameters and magnetic moments values have been determined for the 8i, 8j, and 8f sites from the Mossbauer spectra.

• 出版日期2015-5-7