Magnetic properties of Ho2Fe17-xMnx - Influence of Mn substitution

Authors

Jianli Wang, University of WollongongFollow
Stewart J. Campbell, UNSWFollow
A J Studer, Bragg Institute ANSTO Australia
S J. Kennedy, Bragg Institute ANSTO Australia
Rong Zeng, University of WollongongFollow

RIS ID

33999

Publication Details

Wang, JL, Campbell, SJ, Studer, A, Kennedy, SJ & Zeng, R (2010), Magnetic properties of Ho₂Fe_17-xMn_x - Influence of Mn substitution, In International Conference on Magnetism (ICM 2009), 26-31 Jul 2009, Karlsruhe, Germany, Journal of Physics: Conference Series, 200 (Section 8), pp. 1-4.

Abstract

The structural and magnetic properties of Ho₂Fe_17−xMn_x (x=0-5) have been investigated by x-ray diffraction, Mössbauer spectroscopy and DC magnetization measurements (0-5 T) over the temperature range 4.5-350 K. Similar to other ferrimagnetic R₂Fe_17-xMn_x systems, the unit cell volume generally increases with Mn content other than for low Mn values where a slight maximum is detected around x ∼ 0.5. The nature of the magnetic phase transitions around T_C is shown by Arrot plot analysis to be second order for all samples. The Curie temperature remains essentially unchanged for Mn contents up to x=1.0 (T_C =336 K for x=0.0, T_C =338 K for x=1.0) before decreasing steadily with further increase in Mn content (T_C =209 K for x=5). The ⁵⁷Fe hyperfine interaction parameters have been determined from variable temperature Mössbauer spectra.