Abstract
The Er 2 Fe 14 C intermetallic compound has been synthesized and studied by 57 Fe Mössbauer spectroscopy and differential scanning calorimetry (DSC). The spin reorientation phenomenon was investigated in this compound in the temperature range 80–330 K by narrow step temperature scanning in the neighborhood of the reorientation temperature 316 K. Spin arrangement in this compound was determined. Experimental Mössbauer spectra were analyzed by fitting six Zeeman subspectra according to six iron occupations of the crystallographic sublattices, except for spin reorientation region, where each subspectrum splits additionally into two Zeeman sextets. A consistent description of Mössbauer spectra below, during and above the spin reorientation temperature – was established. Parameters of hyperfine interactions, their temperature dependencies in transition region and spin reorientation temperature were obtained from consistent fits. DSC studies proved that the spin reorientations were accompanied by thermal effects. The spin reorientation temperature was established to be T SR = 313 ± 2 K and the enthalpy of the transition Δ H = 0.26 ± 0.04 J/g. A comparison of spin reorientation process in Er 2 Fe 14 C and Er 2 Fe 14 B is presented.
Published Version
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