Ferromagnetic interactions and martensitic transformation in Fe doped Ni-Mn-In shape memory alloys

Abstract

The structure, magnetic and martensitic properties of Fe doped Ni-Mn-In magnetic shape memory alloys have been studied by differential scanning calorimetry, magnetization, resistivity, X-ray diffraction (XRD) and EXAFS. While Ni${}_2$MnIn${}_{1-x}$Fe${}_x$ ($0\le x\le 0.6$) alloys are ferromagnetic and non martensitic, the martensitic transformation temperature in Ni${}_2$Mn${}_{1.5}$In${}_{1-y}$Fe${}_y$ and Ni${}_2$Mn${}_{1.6}$In${}_{1-y}$Fe${}_y$ increases for lower Fe concentrations ($y\le 0.05$) before decreasing sharply for higher Fe concentrations. XRD analysis reveals presence of cubic and tetragonal structural phases in Ni${}_2$MnIn${}_{1-x}$Fe${}_x$ at room temperature with tetragonal phase content increasing with Fe doping. Even though the local structure around Mn and Ni in these Fe doped alloys is similar to martensitic Mn rich Ni-Mn-In alloys, presence of ferromagnetic interactions and structural disorder induced by Fe affect Mn-Ni-Mn antiferromagnetic interactions resulting in suppression of martensitic transformation in these Fe doped alloys.

arXiv commentAccepted for publication in J. Appl. Phys

References in corpus (11)

• Magnetic superelasticity and inverse magnetocaloric effect in Ni-Mn-In
• Large zero-field cooled exchange-bias in bulk Mn2PtGa
• Phase transitions in Ni2+xMn1-xGa with a high Ni excess
• Anomalous vibrational effects in non-magnetic and magnetic Heusler alloys
• Phase diagram of Fe-doped Ni-Mn-Ga ferromagnetic shape-memory alloys
• Antiferromagnetic Exchange Interactions in Ni${}_2$Mn${}_{1.4}$In${}_{0.6}$ ferromagnetic Heusler alloy
• Local Atomic Structure of Martensitic Ni${}_{2+x}$Mn${}_{1-x}$Ga: An EXAFS Study
• Role of Ni-Mn hybridization in magnetism of martensitic state of Ni-Mn-In shape memory alloys
• Correlation between Local Structure Distortions and Martensitic Transformation in Ni-Mn-In alloys
• Ferromagnetic interactions and martensitic transformation in Fe doped Ni-Mn-In shape memory alloys
• Magnetic interactions in the Martensitic phase of Mn rich Ni-Mn-In shape memory alloys

Cited by in corpus (4)

• Ferromagnetic interactions and martensitic transformation in Fe doped Ni-Mn-In shape memory alloys
• Unusual Strain glassy phase in Fe doped Ni${}_2$Mn${}_{1.5}$In${}_{0.5}$
• Strain glass versus antisite disorder induced ferromagnetic state in Fe doped Ni-Mn-In Heusler martensites
• Importance of site occupancy and absence of strain glassy phase in Ni${}_{2-x}$Fe${}_x$Mn${}_{1.5}$In${}_{0.5}$