57Fe Mössbauer and magnetic studies of Nd3Fe24.5Cr4.5

Authors

Jianli Wang, University of WollongongFollow
M F. Md Din, University of WollongongFollow
Stewart J. Campbell, University of New South WalesFollow
Shane Kennedy, ANSTO, Bragg Institute, AnstoFollow
F Yang, Chinese Academy of Sciences
Guangheng Wu, Chinese Academy of Sciences
S X. Dou, University of WollongongFollow

RIS ID

95740

Publication Details

Wang, J. L., Md Din, M. F., Campbell, S. J., Kennedy, S. J., Yang, F. M., Wu, G. H. & Dou, S. X. (2015). 57Fe Mössbauer and magnetic studies of Nd3Fe24.5Cr4.5. Hyperfine Interactions, 231 (1-3), 65-74.

Abstract

The structural and magnetic properties of the rare earth transition metal compound Nd ₃Fe _24.5Cr _4.5 have been investigated by variable temperature high resolution x-ray diffraction together with DC magnetization and ⁵⁷Fe Mössbauer effect measurements. The magnetic ordering temperature has been found to be T _C= 423(5) K with spin reorientation detected below room temperature around T _sr= 158(5) K. Rietveld refinements indicate that Nd ₃Fe _24.5Cr _4.5 crystallizes in the Nd ₃(Fe,Ti) ₂₉-type structure with the A2/m space group and a substantial magneto-volume effect is detected around T _C. The Mössbauer spectra can be fitted well using five sub-spectra. The temperature dependence of the average hyperfine field has been analysed in terms of different power laws of the reduced temperature. The Debye temperature of Nd ₃Fe _24.5Cr _4.5 has been determined as 𝜃 _D= 400(± 30) K from a fit to the variable temperature isomer shift IS(T).

Grant Number

ARC/DP110102386

Additional Grant Number

http://purl.org/au-research/grants/arc/DP110102386