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Thermal history dependence of first-order magneto-elastic transition in (Mn,Fe)2(P,Si) compounds.

Number: 1620

Author(s) : MIAO X. F., CARON L., DAOUD-ALADINE A., et al.

Summary

In-situ high resolution neutron powder diffraction is used to study the peculiar “virgin effect” in the (Mn,Fe)2. Our results show that the “virgin effect” is related to the high-temperature meta-stable phase in the as-prepared sample, which is kept at room temperature after high-temperature annealing. The meta-stable phase is transformed to the low-temperature stable phase during the para-ferromagnetic transition upon first cooling, after which the “virgin effect” vanishes. High temperature annealing can “reset” the sample to the high-temperature meta-stable state, which leads to the recovery of the “virgin effect”. The energy barrier associated with the phase transformation from low-temperature phase to high-temperature meta-stable phase was calculated using thermodynamic analysis. (P,Si) compounds.

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Details

  • Original title: Thermal history dependence of first-order magneto-elastic transition in (Mn,Fe)2(P,Si) compounds.
  • Record ID : 30012688
  • Languages: English
  • Source: 6th International Conference on Magnetic Refrigeration at Room Temperature (Thermag VI). Proceedings: Victoria, Canada, September 7-10, 2014.
  • Publication date: 2014/09/07

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