Strain glass versus antisite disorder induced ferromagnetic state in Fe doped Ni-Mn-In Heusler martensites

Rukma Nevgi; K. R. Priolkar; Mehmet Acet

doi:10.1088/1361-6463/abe3b0

paper

Strain glass versus antisite disorder induced ferromagnetic state in Fe doped Ni-Mn-In Heusler martensites

arXiv:2102.11611 · doi:10.1088/1361-6463/abe3b0

Abstract

Fe doping in Ni $_{2}$ Mn $_{1.5}$ In $_{0.5}$ results in suppression of the martensitic phase via two contrasting routes. In Ni $_{2}$ Mn $_{1.5 - x}$ Fe $_{x}$ In $_{0.5}$ , the martensitic phase is converted to a strain glassy phase, while in Ni $_{2 - y}$ Fe $_{y}$ Mn $_{1.5}$ In $_{0.5}$ , a cubic ferromagnetic phase results at the expense of the martensite. Careful studies of magnetic and structural properties reveal the presence of the impurity $γ -$ (Fe,Ni) phase as the reason for the emergence of non-ergodic strain glassy phase when Fe is sought to be doped at Y/Z (Mn) sites of X $_{2}$ YZ Heusler alloy. Whereas attempts to dope Fe in the X (Ni) sublattice result in an A2 type antisite disorder that promotes a ferromagnetic ground state.

References in corpus (4)

Cited by in corpus (1)

Randomly packed Ni $_{2}$ MnIn and NiMn structural units in off stoichiometric Ni $_{2}$ Mn $_{2 - y}$ In $_{y}$ alloys