Room temperature inverse magnetocaloric effect in Pd substituted Ni50Mn37Sn13 Heusler alloys

Saha, Ritwik; Nigam, A. K.

doi:10.1016/j.physb.2014.04.011

Cited by 13 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mostly, the topic discussed in this paper <<polycrystalline ternary full Heusler alloys heat treated>> have focused on the doping element on the off-stoichiometric Ni-Mn-Sn shape memory alloy to develop quaternary systems, such as Ni-Mn-Sn-Co [5], Ni-Mn-Sn-Cu [6], Ni-Mn-Sn-Pd [7]. As motivation, we want to produce such alloys to improve their physical properties and promote their application in the future i.e., adding of fourth element atoms may tailor the microstructure and the magnetic response, the transition temperature and the degree of hysteresis associated with the martensitic transition.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties, martensitic and magnetostructural transformations of ferromagnetic Ni–Mn–Sn–Cu shape memory alloys

et al. 2020

View full text Add to dashboard Cite

The influence of Cu doping on structural and magnetic properties of Ni50-xMn36Sn14-yCux, y (x=0, 1,2 and y=1 at. %) ribbons has been investigated. The crystalline structures of the alloys were resolute by X-ray diffraction (XRD). It is found that the addition of Cu for Ni stabilizes austenite phase, whereas, replacing small amount of Cu for Sn stabilizes modulated martensite phase. Differential scanning calorimetry measurements have proved the characteristic transformation temperatures. The transformation temperatures generally rise as increasing the Cu content. Therefore, the magneto structural transition, analysed by vibrating sample magnetometry, is tuned by appropriate Cu doping in the alloys. Likewise, both martensitic and austenitic states exhibit ferromagnetic behaviour.

show abstract

Section: Introductionmentioning

confidence: 99%

Magnetic properties, martensitic and magnetostructural transformations of ferromagnetic Ni–Mn–Sn–Cu shape memory alloys

et al. 2020

View full text Add to dashboard Cite

show abstract

“…This effect may arise from the modified d Mn -d Mn distance and stronger hybridization between Ni and Mn atoms in a reduced unit cell volume leading to higher density of states (DOS) near the Fermi level, which may then promote MT. Accordingly, increase of lattice parameter such as in Pd for Ni substituted Ni 50−x Pd x Mn 37 Sn 13 was reported to result in a simultaneous decrease of T MT and T A C , potentially due to a decrease in the Ni-Mn exchange interaction originating in increased lattice constant [57]. Furthermore, it was shown that the chemical pressure effect may even in some cases compete and dominate the e/a such as in Al substituted Ni 43 [59] alloys, where despite decreasing e/a, the T MT increased and T A C remained almost unchanged.…”

Section: Discussionmentioning

confidence: 99%

Martensitic transformation, magnetic entropy, and adiabatic temperature changes in bulk and ribbon Ni48Mn39.5Sn12.5−xInx (x = 2, 4, 6) metamagnetic shape memory alloys

Czaja

Przewoźnik

Hawełek

et al. 2021

Journal of Materials Research

View full text Add to dashboard Cite

Martensitic transformation, magnetic entropy, and direct adiabatic temperature changes in Ni48Mn39.5Sn12.5−xInx (x = 2, 4, 6) metamagnetic Heusler bulk and grain-constrained ribbon alloys were studied. All alloys showed a typical L21 structure in austenite and the 4O structure in martensite. Their relative volume contributions changed depending on In content. With increasing In concentration, the martensitic transformation temperature increased, whereas the Curie temperature of austenite decreased. The magnetic entropy change under magnetic field of 5 T attained maximum of 20 J/kgK in the bulk and 14.4 J/kgK in the ribbon alloys with the Ni48Mn39.5Sn8.5In4 nominal composition. The corresponding adiabatic temperature change under 1.7 T yielded 1.3 K for the Ni48Mn39.5Sn8.5In4 bulk alloy. Despite grain confinement, melt spinning was found to stabilize martensite phase. Changes observed were discussed with relation to strengthened covalency imposed by In substitution. Graphic abstract

show abstract

“…Likewise, R. Saha et al have observed the same effect. We also observed that the replacement of Pd in Ni 50-x Pd x Mn 37 Sn 13 rises the refrigerant capacity (RC) near room temperature [17]. However, the predictable values of MCE parameters, such as the isothermal ∆S M and RC, unavoidably should be validated from magnetic measurements.…”

Section: Introductionmentioning

confidence: 91%

Martensitic Transformation, Thermal Analysis and Magnetocaloric Properties of Ni-Mn-Sn-Pd Alloys

et al. 2020

View full text Add to dashboard Cite

Martensitic transition and magnetic response of Ni50−x Pdx,y Mn36 Sn14−y (x = 0, 1, 2 and y = 0, 1) Heusler alloys were analysed. The crystalline structure of each composition was solved by X-ray diffraction pattern fitting. For x = 1 and 2, the L21 austenite structure is formed and, for y = 1, the crystallographic phase is a modulated martensitic structure. From differential scanning calorimetry scans, we determine characteristic transformation temperatures and the entropy/enthalpy changes. The temperatures of the structural transformation increase with the addition of Pd to replace Ni or Sn, whereas the austenitic Curie temperature remains almost unvarying. In addition, the magneto-structural transition, investigated by magnetic measurements, is adjusted by suitable Pd doping in the alloys. The peak value of the magnetic entropy changes reached 4.5 J/(kg K) for Ni50Mn36Sn13Pd1 (external field: 50 kOe).

show abstract

Room temperature inverse magnetocaloric effect in Pd substituted Ni50Mn37Sn13 Heusler alloys

Cited by 13 publications

References 11 publications

Magnetic properties, martensitic and magnetostructural transformations of ferromagnetic Ni–Mn–Sn–Cu shape memory alloys

Magnetic properties, martensitic and magnetostructural transformations of ferromagnetic Ni–Mn–Sn–Cu shape memory alloys

Martensitic transformation, magnetic entropy, and adiabatic temperature changes in bulk and ribbon Ni48Mn39.5Sn12.5−xInx (x = 2, 4, 6) metamagnetic shape memory alloys

Martensitic Transformation, Thermal Analysis and Magnetocaloric Properties of Ni-Mn-Sn-Pd Alloys

Contact Info

Product

Resources

About