Magnetostrain and magnetocaloric effect by field-induced reverse martensitic transformation for Pd-doped Ni45Co5Mn37In13 Heusler alloy

Abstract

In the present work, polycrystalline Ni45Co5−xPdxMn37In13 (x = 0, 0.5, 1, and 3) Heusler alloys were prepared. The influences of Pd substitution for Co on crystal structure, martensitic transformation (MT), and magnetic properties have been carefully investigated for these quinary alloys. The structure measurement indicates that every sample possesses L10 martensitic structure at room temperature. With increasing of Pd content, it is found that the MT region shifts towards higher temperature, but the Curie transition region of austenitic state moves to lower temperature. Owing to the fact that the MT gradually approaches Curie point, the magnetization of austenitic phase is significantly decreased, while the one of martensitic phase almost remains unchanged. In addition, the functional properties associated with the field-induced reverse MT have been also studied in Ni45Co5−xPdxMn37In13 (x = 0, 0.5, and 1) alloys. In comparison to quaternary parent alloy, both of enhanced magnetostrain (0.3%) and isothermal entropy change (25 J/kg K) are observed in quinary Ni45Co4.5Pd0.5Mn37In13 alloy under an applied magnetic field up to 3 T. The implication of such results has been discussed in detail.

Investigation of the inverse magnetocaloric effect with the fraction method

“…Generally, alloying some other elements, especially Nb [12,13] or Ti [11,[14][15][16] in substitution for Ni, can effectively decrease the T M and tune the T C in Ni-Mn-X based alloys. Likewise, several investigations have been performed on the effect of alloying elements such as Pd [17] and Fe [18] on phase transformation characteristics and magnetocaloric performance of Ni-Co-Mn-X (X = In, Sn, Sb, Ga) alloys. The substitution of Ni with Nb or Ti was found to be capable of adjusting the T M , but with a detrimental effect of also decreasing the latent heat of the structural transition [12,14].…”

Recent Progress in Crystallographic Characterization, Magnetoresponsive and Elastocaloric Effects of Ni-Mn-In-Based Heusler Alloys—A Review

“…Different from mechanical properties that are strongly dependent on microstructure, T M belongs to the inherent property of materials and thus is mainly determined by the chemical composition. Aimed at reducing ΔS mag by tailoring T M , for the ternary NiMnIn alloys, several alloying methods including changing relative contents of different elements of the alloy and adding the fourth alien elements, such as Cu (Li et al, 2019a;Yan et al, 2021a;Huang et al, 2021), Cr (Sharma et al, 2010a;Sharma et al, 2011), Fe (Chen et al, 2012;Feng et al, 2012), Ga (Paramanik and Das, 2016) and Pd (Li et al, 2015), have been utilized. For instance, under the guidance of valence electron concentration (e/a) criteria of T M , i.e., a larger e/a corresponds to a higher T M (Wei et al, 2016), Feng et al elevated T M of Ni 50 Mn 34 In 16 from 250 K to 303 K via the partial substitution of a low valence electron number (VEN) element of In (5s 2 p 1 , VEN = 3) by a high VEN element of Fe (3d 6 4s 2 , VEN = 8) (Feng et al, 2012).…”

“…For the Co-doped NiCoMnIn alloys, compared with ternary NiMnIn alloys, the negative contribution of ΔS mag to ΔS tr is more pronounced as the addition of Co greatly enhances the magnetism of austenite and then the value of ΔM (Li et al, 2019a;Yang et al, 2020). The strategy of weakening ΔS mag in the NiCoMnIn alloy is the same as that of NiMnIn, i.e., elevating T M to make it close to T A C by doping a fifth alien element, such as Cu (Li et al, 2019b;Yan et al, 2021a;Huang et al, 2021), Fe (Chen et al, 2012), Ga (Paramanik and Das, 2016), Pd (Li et al, 2015). With respect to the ternary NiMnIn alloys, in these cases, two elements, i.e., Co and a fifth element, are doped.…”

Computation-Guided Design of Ni–Mn–Sn Ferromagnetic Shape Memory Alloy with Giant Magnetocaloric Effect and Excellent Mechanical Properties and High Working Temperature via Multielement Doping

“…found that the ΔM across the MT increased remarkably in Ni 45 Co 5 Mn 37 In 13 (50 emu/g) in contrast to Ni 49 Co 1 Mn 37 In 13 (0.03 emu/g). 40 Also, Co doping in Ni−Mn−Sn alloys has the same effect on enhancing the ΔM. 19,33 Moreover, Krenke et al investigated Ni 50−x Co x Mn 37 Sn 13 alloy and found that addition of 3 atom % Co doping could improve the T C to 335 K from 311 K. 21 Cong et al observed a relatively high T C of 396 K in Ni 44 Co 6 Mn 39 Sn 11 alloy.…”

“…Due to that, Co doping greatly changes the magnetic configuration in Ni–Mn-based Heusler alloys and Co doping shows a huge influence on the Δ M in Ni–Mn-based SMAs. ,, Liu at al. found that the Δ M across the MT increased remarkably in Ni 45 Co 5 Mn 37 In 13 (50 emu/g) in contrast to Ni 49 Co 1 Mn 37 In 13 (0.03 emu/g) . Also, Co doping in Ni–Mn–Sn alloys has the same effect on enhancing the Δ M . , Moreover, Krenke et al investigated Ni 50– x Co x Mn 37 Sn 13 alloy and found that addition of 3 atom % Co doping could improve the T C to 335 K from 311 K .…”