Magnetoresistance and field-induced structural transitions in Ni50Mn50−xSnx Heusler alloys

Khan, Mahmud; Pathak, Arjun K.; Paudel, Moti; Dubenko, Igor; Stadler, Shane; Ali, Naushad

doi:10.1016/j.jmmm.2007.06.016

Cited by 95 publications

(41 citation statements)

References 15 publications

(23 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10 While this coexistence of different magnetic interactions in the martensitic phase results in the observation of exchange bias behavior, 11,12 the change of magnetism during the martensitic phase transition results in the observation of large magnetic entropy changes 6,13 and magnetoresistance. 14,15 Thus, the multifunctional properties of the Ni 50 Mn 50Ày Z y Heusler alloys not only depend on the martesitic phase transition but also depend strongly on the strengths of the magnetic interactions in the two phases.…”

mentioning

confidence: 99%

“…Recently, we showed that partial replacement of Mn by Cr in Ni 50 Mn 37Àx Cr x Sb 13 Heusler alloys results in the destabilization of the martensitic phase due to the weakening of the Ni-Mn hybridization. 15 From both scientific and applied points of view, it is interesting to explore how the magnetic properties of these alloys change with Cr substitution. If the strength of the Ni-Mn hybridization really plays a dominant role in influencing the magnetism of these alloys, Cr substitution is expected to weaken the antiferromagnetic (AFM) interactions of the martensitic phase and strengthen the net ferromagnetism of Ni 50 Mn 37Àx Cr x Sb 13 alloys.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Enhancement of ferromagnetism by Cr doping in Ni-Mn-Cr-Sb Heusler alloys

Khan

Dubenko

Stadler

et al. 2013

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

A series of Mn rich Ni50Mn37−xCrxSb13 Heusler alloys have been investigated by dc magnetization and electrical resistivity measurements. Due to the weakening of the Ni-Mn hybridization, the martensitic transition shifts to lower temperatures with increasing Cr concentration, while the saturation magnetization at 5 K increases. The magnetoresistance and exchange bias properties are dramatically suppressed with increasing Cr concentration. The observed behaviors suggest that substitution of Cr for Mn in Ni50Mn37−xCrxSb13 Heusler alloys not only destabilizes the martensitic phase but also enhances ferromagnetism in the system. The possible mechanisms responsible for the observed behavior are discussed.

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Enhancement of ferromagnetism by Cr doping in Ni-Mn-Cr-Sb Heusler alloys

Khan

Dubenko

Stadler

et al. 2013

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…Such a change in slope was also found in nonmagnetic Ni 50 Ti 50 alloy and was attributed to phonon drag contribution that was broadened by disorder. 32 However, this feature was not observed in the ferromagnetic shape memory alloy Ni 50 Mn 34 In 16 . 22 Upon heating from 10 K, α(T) exhibits hysteresis at T M as is the case with the resistivity, due to the first-order structural phase transition.…”

Section: Resultsmentioning

confidence: 94%

“…19,20 It was reported that density of states (DOS) changes at the A-M transition in Ni-Mn-Ga alloys. 21 However, the negative thermopower in Ni 50 Mn 34 In 16 22 and Mn 2 NiGa 23 shows an abrupt decrease in magnitude at the A-M transition during cooling, and the anomaly at T M is very weak in Ni 50 Mn 36 Sn 14 .…”

Section: Introductionmentioning

confidence: 98%

Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons

et al. 2015

View full text Add to dashboard Cite

We report magnetization, magnetoresistance (MR) and magnetothermopower (MTEP) of melt spun Ni 50 Mn 37 Sn 13 ribbons which exhibit an austentite to martensite phase transition at a temperature (T M ) ≈ 294 K. Upon cooling from 400 K, dcresistivity and thermopower show abrupt changes at T M , indicating a change in the electronic density of states. The thermopower is negative from 400 K down to 10 K. Application of a magnetic field of µ 0 H = 5 T decreases T M by 5 K and induces large negative MR (-23%) but positive MTEP (9%) near T M . While the MR is appreciable from T M down to 10 K, MTEP is significant only below 60 K (MR = -2.5% and MTEP = +300% at 10 K). The magnetic field dependence of resistivity and thermopower show either reversible or irreversible behavior near T M , depending on whether the sample is zero-field cooled or field-cooled, which indicates that the electronic band structure near T M is magnetic history dependent. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx

show abstract

“…The off-stoichiometric Ni-Mn-In Heusler systems have been drawing interest due to their temperature-induced magnetostructural transitions (MST), which are responsible for extreme physical properties like giant normal and inverse magnetocaloric effects, 1-3 giant magnetoresistance, 4,5 large anomalous Hall effects, 6 and magnetic shape memory effects. 7 Most of the research for the Ni-Mn-In based Heusler alloys have been being carried out for bulk materials by means of conventional melting techniques followed by lengthy high-temperature thermal annealing.…”

Section: Introductionmentioning

confidence: 99%

Magnetostructural transitions and magnetocaloric effects in Ni50Mn35In14.25B0.75 ribbons

et al. 2018

Self Cite

View full text Add to dashboard Cite

The structural, thermal, and magnetic behaviors, as well as the martensitic phase transformation and related magnetocaloric response of Ni50Mn35In14.25B0.75 annealed ribbons have been investigated using room-temperature X-ray diffraction (XRD), differential scanning calorimetry (DSC), and magnetization measurements. Ni50Mn35In14.25B0.75 annealed ribbons show a sharper change in magnetization at the martensitic transition, resulting in larger magnetic entropy changes in comparison to bulk Ni50Mn35In14.25B0.75. A drastic shift in the martensitic transformation temperature (TM) of 70 K to higher temperature was observed for the annealed ribbons relative to that of the bulk (TM = 240 K). The results obtained for magnetic, thermal, structural, and magnetocaloric properties of annealed ribbons have been compared to those of the corresponding bulk alloys.

show abstract

Magnetoresistance and field-induced structural transitions in Ni50Mn50−xSnx Heusler alloys

Cited by 95 publications

References 15 publications

Enhancement of ferromagnetism by Cr doping in Ni-Mn-Cr-Sb Heusler alloys

Enhancement of ferromagnetism by Cr doping in Ni-Mn-Cr-Sb Heusler alloys

Magnetic field dependence of electrical resistivity and thermopower in Ni50Mn37Sn13 ribbons

Magnetostructural transitions and magnetocaloric effects in Ni50Mn35In14.25B0.75 ribbons

Contact Info

Product

Resources

About