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

Lobo, D. N.; Priolkar, K. R.; Emura, S.; Nigam, A. K.

doi:10.1063/1.4901469

Cited by 16 publications

(8 citation statements)

References 34 publications

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“…2c summarises the evolution of the structural transformations and the magnetic phases as a function of x for the Ni 50 Mn 34 In 16−x Fe x system. The substitution of Fe for In shifts T M to a higher temperature, which agrees with previous results for Ni-Mn-In-Fe MSMAs [45]. T c of austenite insignificantly changes within 1 ≤ x < 3, while it overlaps with T M for 3 < x ≤ 5.…”

Section: Resultssupporting

confidence: 91%

Large exchange bias in magnetic shape memory alloys by tuning magnetic ground state and magnetic-field history

et al. 2020

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The exchange bias is of technological significance in magnetic recording and spintronic devices. Pursuing a large bias field is a long-term goal for the research field of magnetic shape memory alloys. In this work, a large bias field of 0.53 T is achieved in the Ni 50 Mn 34 In 16−x Fe x (x = 1, 3, 5) system by tuning the magnetic ground state (determined by the composition x) and the magnetic-field history (determined by the magnetic field H FC during field cooling and the maximum field H Max during isothermal magnetization). The maximum volume fraction of the interfaces between the ferromagnetic clusters and antiferromagnetic matrix and the strong interfacial interaction are achieved by tuning the magnetic ground state and the magnetic-field history, which results in strong magnetic unidirectional anisotropy and the large exchange bias. Moreover, two guidelines were proposed to obtain the large bias field. Firstly, the composition with a magnetic ground state consisting of the dilute spin glass and the strong antiferromagnetic matrix is preferred to obtain a large bias field; secondly, tuning the magnetic-field history by enhancing H FC and reducing H Max is beneficial to achieving large exchange bias. Our work provides an effective way for designing magnetically inhomogeneous compounds with large exchange bias.

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Section: Resultssupporting

confidence: 91%

Large exchange bias in magnetic shape memory alloys by tuning magnetic ground state and magnetic-field history

et al. 2020

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confidence: 99%

“…Fe doping in martensitic Ni-Mn-In alloys results in sup-pression of T M and strengthening of ferromagnetic interactions [11,12]. The suppression is rather rapid and is explained to be due to destruction of Mn -Ni -Mn antiferromagnetic interactions and formation of Fe -Fe ferromagnetic interactions due to site occupancy disorder [12]. The question then arises is to whether Fe doping in martensitic Ni 2 MnIn alloys also results in impeding long range ordering of elastic strain vector and formation of strain glass phase similar to the one observed in impurity doped NiTi alloys.…”

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Unusual strain glassy phase in Fe doped Ni2Mn1.5In0.5

Nevgi

Priolkar

2018

Applied Physics Letters

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Fe doped Ni2Mn1.5In0.5, particularly, Ni2Mn1.4Fe0.1In0.5, despite having an incommensurate, modulated 7M martensitic structure at room temperature exhibits frequency dependent behavior of storage modulus and loss that obeys Vogel-Fulcher law as well as shows ergodicity breaking between zero field cooled and field cooled strain measurements just above the transition temperature. Both, frequency dependence and ergodicity breaking are characteristics of a strain glassy phase and occur due to presence of strain domains which are large enough to present signatures of long range martensitic order in diffraction but are non interacting with other strain domains due to presence of Fe impurity.

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“…For example, in Ni 50−x Co x Mn 39 Sn 11 alloy with x=9 and 10, no martensitic transformation was observed, the austenite in these two alloys were more stable which is due to the precipitation embedded in the austenitic matrix [28]. For our sample (x=4), such a disappearance of martensitic transformation in Ni 50-x Fe x Mn 36 Sn 14 alloys is due to crystallographic phase separation of cubic phase to tetragonal phase with the increase of Fe content, which is a result of structural disorder caused by Fe doping and leads to Fe-Fe ferromagnetic exchange interactions [29].…”

Section: Resultsmentioning

confidence: 66%

Tuning martensitic transformation, large magnetoresistance and strain in Ni 50−x Fe x Mn 36 Sn 14 Heusler alloys

Liao

Jing

Zheng

et al. 2015

Solid State Communications

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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-

Cited by 16 publications

References 34 publications

Large exchange bias in magnetic shape memory alloys by tuning magnetic ground state and magnetic-field history

Large exchange bias in magnetic shape memory alloys by tuning magnetic ground state and magnetic-field history

Unusual strain glassy phase in Fe doped Ni2Mn1.5In0.5

Tuning martensitic transformation, large magnetoresistance and strain in Ni 50−x Fe x Mn 36 Sn 14 Heusler alloys

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