Exchange bias in bulk Mn rich Ni–Mn–Sn Heusler alloys

Khan, Mahmud; Dubenko, Igor; Stadler, Shane; Ali, Naushad

doi:10.1063/1.2818016

Cited by 160 publications

(95 citation statements)

References 29 publications

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“…Systematic change of EB effect has been reported in Mn-rich Ni-Mn-Sn alloys with composition Ni 50 Mn 50−x Sn x as a result in variation of x [163].…”

Section: Ni-mn-sn Alloysmentioning

confidence: 99%

Exchange bias effect in alloys and compounds

Giri

Patra

Majumdar

2011

J. Phys.: Condens. Matter

321

225

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Abstract. The phenomenology of exchange bias effects observed in structurally single-phase alloys and compounds but composed of a variety of coexisting magnetic phases such as ferromagnetic, antiferromagnetic, ferrimagnetic, spin-glass, clusterglass, disordered magnetic states are reviewed. The investigations on exchange bias effects are discussed in diverse types of alloys and compounds where qualitative and quantitative aspects of magnetism are focused based on macroscopic experimental tools such as magnetization and magnetoresistance measurements. Here, we focus on improvement of fundamental issues of the exchange bias effects rather than on their technological importance.

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“…Systematic change of EB effect has been reported in Mn-rich Ni-Mn-Sn alloys with composition Ni 50 Mn 50−x Sn x as a result in variation of x [163].…”

Section: Ni-mn-sn Alloysmentioning

confidence: 99%

Exchange bias effect in alloys and compounds

Giri

Patra

Majumdar

2011

J. Phys.: Condens. Matter

321

225

View full text Add to dashboard Cite

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“…It's relation to properties like large magnetocaloric effects, magnetic superelasticity [1][2][3] and magnetic field induced giant strains [4,5] and exchange bias behaviour [6] find applications in technology.…”

Section: Introductionmentioning

confidence: 99%

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

Lobo

Priolkar

Emura

et al. 2014

Journal of Applied Physics

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“…A fascinating evidence for the complex ground state of the alloys is the recently observed exchange bias (EB) phenomenon in bulk samples [9,11,12]. EB is referred to the shift of the center of the magnetic hysteresis loop from the origin when the sample has been cooled from high temperature in presence of magnetic field [13].…”

mentioning

confidence: 99%

Reentrant-spin-glass state inNi2Mn1.36Sn0.64shape-memory alloy

et al. 2009

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The ground state properties of the ferromagnetic shape memory alloy of nominal composition Ni2Mn1.36Sn0.64 have been studied by dc magnetization and ac susceptibility measurements. Like few other Ni-Mn based alloys, this sample exhibits exchange bias phenomenon. The observed exchange bias pinning was found to originate right from the temperature where a step-like anomaly is present in the zero-field-cooled magnetization data. The ac susceptibility study indicates the onset of spin glass freezing near this step-like anomaly with clear frequency shift. The sample can be identified as a reentrant spin glass with both ferromagnetic and glassy phases coexisting together at low temperature at least in the field-cooled state. The result provides us an comprehensive view to identify the magnetic character of various Ni-Mn-based shape memory alloys with competing magnetic interactions.PACS numbers: 75.50. Lk, 75.60.Nt,75.47.Np Recently Ni 2 Mn 1+x Z 1−x (Z = In, Sn, and Sb) based ferromagnetic shape memory alloys (FSMAs) have attracted considerable attention due to their multifunctional properties, which include magnetic sueprelasticity, giant magnetoresistance, large inverse magnetocaloric effect and magnetic memory effect [1,2,3,4,5]. The observed phenomena are primarily related to the magnetic field (H) induced reverse transition across the martensitic transformation (MT) [6]. The stoichiometric Heusler compositions (Ni 2 MnZ) are all ferromagnetic with the Curie point (T C ) lying just above room temperature. The excess Mn doping at the expense of Z atoms induces structural instability in the system leading to the ferromagnetic shape memory effect. Short range antiferromagnetic (AFM) interaction between the excess Mn (at the Z site) and the original Mn atoms has been predicted for the doped alloys [7,8]. Although, predominantly ferromagnetic (FM) character is present in the Mn doped alloys with T C around 300 K, the AFM correlation is evident from the gradual decrease of saturation moment with increasing amount of excess Mn [7,9]. Diffuse peaks observed in the powder neutron diffraction data of Ni-Mn-Sn alloys also indicate the existence of incipient AFM coupling [10].Evidently, the magnetic nature of the ground state of the alloys may not be very simple. A fascinating evidence for the complex ground state of the alloys is the recently observed exchange bias (EB) phenomenon in bulk samples [9,11,12]. EB is referred to the shift of the center of the magnetic hysteresis loop from the origin when the sample has been cooled from high temperature in presence of magnetic field [13]. The origin of EB is gener- * Electronic address: sspsm2@iacs.res.in ally ascribed to the presence of FM and AFM interfacial coupling in a heterogeneous sample. EB has also been observed in materials having FM/spin-glass (SG) and FM/Ferrimagnet interfaces [14,15] other than FM/AFM systems. However in all the cases, it is required that the ordering temperature (T N F ) for the non-ferromagnetic phase (may be AFM, SG or ferrimagnet) should be l...

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Exchange bias in bulk Mn rich Ni–Mn–Sn Heusler alloys

Cited by 160 publications

References 29 publications

Exchange bias effect in alloys and compounds

Exchange bias effect in alloys and compounds

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

Reentrant-spin-glass state inNi2Mn1.36Sn0.64shape-memory alloy

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