Critical behaviour of Ho 2 Fe 17 − x Mn x —magnetisation and Mössbauer spectroscopy | Zendy

Jianli Wang | Zendy; S. J. Campbell | Zendy; S. J. Kennedy | Zendy; Shi Xue Dou | Zendy

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Critical behaviour of Ho 2 Fe 17 − x Mn x —magnetisation and Mössbauer spectroscopy

Author(s) -

Jianli Wang,

S. J. Campbell,

S. J. Kennedy,

Shi Xue Dou

Publication year - 2012

Publication title -

hyperfine interactions

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.359

H-Index - 48

eISSN - 1572-9540

pISSN - 0304-3843

DOI - 10.1007/s10751-012-0707-3

Subject(s) - magnetization , condensed matter physics , critical exponent , ferromagnetism , mössbauer spectroscopy , isothermal process , phase transition , materials science , magnetic field , chemistry , physics , thermodynamics , crystallography , quantum mechanics

The magnetic properties of Ho2Fe17 − xMnx compounds (x = 0–2) of ferromagnetic ordering temperatures up to TC ~344 K have been investigated by DC magnetization and Mössbauer effect measurements. The nature of the magnetic phase transitions and the critical behaviour around TC has been investigated by analysis of the magnetisation data and the critical exponents β, γ and δ determined. The critical exponents are found to be similar to the theoretical values of the mean-field model for which β = 0.5 and γ = 1.0, indicating the existence of a long-range ferromagnetic interactions. The isothermal entropy changes ΔS around TC have been determined as a function of temperature in different magnetic fields. © 2012, Springe

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