Magnetic field induced order–order phase transition in magnetocaloric systems Mn2−xFexAs0.5P0.5 and MnFeAsyP1−y

Based on the spin-fluctuation approach and the first-principles calculations of electronic structure, the mechanism of spontaneous magnetostriction accompanying the first order ferromagnetism–paramagnetism transitions in the Mn2−xFexAs0.5P0.5 magnetocaloric system is analyzed. When simulating the electronic structure of the paramagnetic phase by the state with disordered local moments, it was shown that the main contribution to the emergence of a giant anisotropic magnetostriction was associated with the destruction of local magnetic moments of iron in the layers with tetrahedral anion environment. Relying on the analysis of numerical experiments it was established that the destruction of the local magnetic moments of Fe in the paramagnetic phase with the local Mn magnetic moments conserved was a consequence of disappearance of the long-range ferromagnetic order in the d-electron subsystem of manganese.

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Magnetic field induced order–order phase transition in magnetocaloric systems Mn2−xFexAs0.5P0.5 and MnFeAsyP1−y

Cited by 4 publications

References 13 publications

Machine learning assisted development of Fe2P-type magnetocaloric compounds for cryogenic applications

Machine learning assisted development of Fe2P-type magnetocaloric compounds for cryogenic applications

Influence of Mn/Fe ratio on the magnetic properties of the Mn2−xFexP0.5As0.5, 0.5≤x≤1 alloys

Electronic mechanism of spontaneous magnetostriction in the layered system Mn2−xFexAs0.5P0.5

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