Giant and reversible room-temperature magnetocaloric effect in Ti-doped Ni-Co-Mn-Sn magnetic shape memory alloys

Qu, Yuhai; Cong, Daoyong; Sun, Xiaoming; Nie, Zhihua; Gui, Wanyuan; Li, Runguang; Ren, Yang; Wang, Y.D.

doi:10.1016/j.actamat.2017.06.010

Cited by 152 publications

(46 citation statements)

References 67 publications

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“…Heat treatment is also a useful method to modulate the grain constraint in order to control the microstructure, martensite transformation (MT) temperature and magnetic properties of the ferromagnetic MSMAs (FMSMAs) 20,21 . Doping of non-ferromagnetic elements 22–24 such as Cu, Al and Ti can enhance ΔM effectively by tuning the valence electron concentration e / a or changing the unit cell volume, which mainly changes the MT temperatures. Of note is that the doping of ferromagnetic elements such as Fe and Co can effectively improve the ΔM .…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetocaloric effect in Ni-Mn-Sn-Co alloys with two successive magnetostructural transformations

Zhang

Qian

et al. 2018

Sci Rep

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High magnetocaloric refrigeration performance requires large magnetic entropy change ΔSM and broad working temperature span ΔTFWHM. A fourth element doping of Co in ternary Ni-Mn-Sn alloy may significantly enhance the saturation magnetization of the alloy and thus enhance the ΔSM. Here, the effects of Co-doping on the martensite transformation, magnetic properties and magnetocaloric effects (MCE) of quaternary Ni47−xMn43Sn10Cox (x = 0, 6, 11) alloys were investigated. The martensite transformation temperatures decrease while austenite Curie point increases with Co content increasing to x = 6 and 11, thus broadening the temperature window for a high magnetization austenite (13.5, 91.7 and 109.1 A·m2/kg for x = 0, 6 and 11, respectively). Two successive magnetostructural transformations (A → 10 M and A → 10 M + 6 M) occur in the alloy x = 6, which are responsible for the giant magnetic entropy change ΔSM = 29.5 J/kg·K, wide working temperature span ΔTFWHM = 14 K and large effective refrigeration capacity RCeff = 232 J/kg under a magnetic field of 5.0 T. These results suggest that Ni40.6Mn43.3Sn10.0Co6.1 alloy may act as a potential solid-state magnetic refrigerant working at room temperature.

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Section: Introductionmentioning

confidence: 99%

Enhanced magnetocaloric effect in Ni-Mn-Sn-Co alloys with two successive magnetostructural transformations

Zhang

Qian

et al. 2018

Sci Rep

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“…2(a). Consequently, a T hys of 2.3 K is achieved for the sample with x = 0.3, which is extremely small in comparison with other Ni-Mn-X-based Heusler alloys [12][13][14][15][16][20][21][22][23][24][25][26][27][28][29][31][32][33][34]. Due to the optimization of the hysteresis, the sample can resist the large migration of T t under thermal cycles.…”

Section: Resultsmentioning

confidence: 91%

“…The obtained hysteresis widths obtained from M-T curves in Figs. 3(a) When a field of 1 T is applied, the shift in T t is comparable to the T hys in sample with x = 0.3, which indicates that a partially reversible field-induced MST could be achieved [33,44]. Figure 4 shows the isothermal M-B curves under two successive 0-1 T cycles measured by the so-called loopmethod [45].…”

Section: Resultsmentioning

confidence: 94%

“…For magnetic SMAs, the strong correlation between the hysteresis width and λ 2 has been widely reported in Ni-Mn-X-based Heusler alloys [15,16,27,33,49,55,56]. The determination of λ 2 relies on the crystalline structures of austenite and martensite and their lattice parameters [57].…”

Section: Resultsmentioning

confidence: 99%

“…The main problem with these materials is that the inherent hysteresis phenomenon linked to the MST causes functional fatigue of the MCE during cycling. Recently, some studies have focused on the improvement of the reversibility for the magnetic-field-induced MST and the accompanying MCE in Ni-(Co)-Mn-In and Ni-(Co)-Mn-Sn systems [31][32][33][34]. Unfortunately, the studied compositions only show a giant reversible magnetic entropy change or adiabatic temperature change ( S m or T ad ) under a 5-T field variation or a moderate effect under a 2-T field variation.…”

Section: Introductionmentioning

confidence: 99%

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Reversible low-field magnetocaloric effect in Ni-Mn-In-based Heusler alloys

You

Huang

et al. 2019

Phys. Rev. Materials

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Ni-Mn-X (X = In, Sn, and Sb) based Heusler alloys show a strong potential for magnetic refrigeration owing to their large magnetocaloric effect (MCE) associated with first-order magnetostructural transition. However, the irreversibility of the MCE under low field change of 0-1 T directly hinders its application as an efficient magnetic coolant. In this work, we systematically investigate thermal and magnetic properties, crystalline structure and magnetocaloric performance in Ni 51−x Mn 33.4 In 15.6 V x alloys. With the introduction of V, a stable magnetostructural transition near room temperature is observed between martensite and austenite. An extremely small hysteresis of 2.3 K is achieved for the composition x = 0.3. Due to this optimization, the magneticfield induced structural transition is partially reversible under 0-1 T cycles, resulting in a reversible MCE. Both magnetic and calorimetric measurements consistently show that the largest value for the reversible magnetic entropy change can reach about 5.1 J kg −1 K −1 in a field change of 0-1 T. A considerable and reversible adiabatic temperature change of −1.2 K by the direct measurement is also observed under a field change of 0-1.1 T. Furthermore, the origin of this small hysteresis is discussed. Based on the lattice parameters, the transformation stretch tensor is calculated, which indicates an improved geometric compatibility between the two phases. Our work greatly improves the MCE performance of Ni-Mn-X-based alloys and make them suitable as realistic magnetic refrigeration materials.

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Tuning the Reversible Magnetocaloric Effect in Ni–Mn–In‐Based Alloys through Co and Cu Co‐Doping

Yang

Liu

et al. 2019

Adv Elect Materials

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The reversibility of the giant magnetocaloric effect (MCE) through the magnetic field–induced magnetostructural transformation in Ni–Mn–In‐based alloys is a key issue towards the potential magnetic refrigeration applications. In this work, Co and Cu are simultaneously doped to tune the reversible magnetocaloric properties associated with the magnetostructural transformation. Owing to the integration of large magnetization difference ΔM, suitable transformation entropy ΔStr, and narrow thermal hysteresis ΔThys in a Ni46Co3Mn35Cu2In14 alloy, the reversible field–induced inverse martensitic transformation is realized in a wide temperature range of 30 K under the field of 5T, yielding a maximum reversible magnetic entropy change ΔSMmax of 16.4 J kg−1 K−1. Moreover, under a low field change of 1.5T, a large reversible adiabatic temperature variation ΔTad of 2.5 K is also obtained, representing the highest value so far under the low field change of 1.5T in Ni–Mn‐based alloys. It is demonstrated that multi‐component alloying by combining the effects of appropriate substitutional elements is an effective way to develop high‐performance magnetocaloric materials.

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Giant and reversible room-temperature magnetocaloric effect in Ti-doped Ni-Co-Mn-Sn magnetic shape memory alloys

Cited by 152 publications

References 67 publications

Enhanced magnetocaloric effect in Ni-Mn-Sn-Co alloys with two successive magnetostructural transformations

Enhanced magnetocaloric effect in Ni-Mn-Sn-Co alloys with two successive magnetostructural transformations

Reversible low-field magnetocaloric effect in Ni-Mn-In-based Heusler alloys

Tuning the Reversible Magnetocaloric Effect in Ni–Mn–In‐Based Alloys through Co and Cu Co‐Doping

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