Magnetostructural martensitic transformations with large volume changes and magneto-strains in all-<i>d</i>-metal Heusler alloys

Wei, Zheng; Liu, E. K.; Li, Y.; Han, Xiao; Du, Zhiwei; Luo, Hongzhi; Liu, G. D.; Xi, Xuekui; Zhang, H. W.; Wang, W. H.; Wu, Guangheng

doi:10.1063/1.4961382

Cited by 104 publications

(59 citation statements)

References 41 publications

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“…In their austenitic phase most magnetic shape memory alloys exhibit a Heusler structure with d-group elements (Ni and Mn) at the 8c (Ni) and 4a (Mn) positions (in Wyckoff notation), and p-group atoms (Ga, Sn, In,...) at the 4b positions 10 . Recently magnetic shape memory Heusler alloys have been developed with all-d-metal elements 11,12 . In these alloys Ti replaces p-group elements and it has been proved that the d-metal Ti provides a stabilization of the Heusler structure by d-d hybridization between Ti at 4b position and its nearestneighbour element at the 8c or 4a position 12 .…”

Section: Introductionmentioning

confidence: 99%

“…Recently magnetic shape memory Heusler alloys have been developed with all-d-metal elements 11,12 . In these alloys Ti replaces p-group elements and it has been proved that the d-metal Ti provides a stabilization of the Heusler structure by d-d hybridization between Ti at 4b position and its nearestneighbour element at the 8c or 4a position 12 . An interesting property of these all-d-group magnetic shape memory alloys is the large relative volume change at their martensitic transition which is significantly larger than for any other magnetic shape memory alloy.…”

Section: Introductionmentioning

confidence: 99%

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Giant barocaloric effect in all- d -metal Heusler shape memory alloys

Aznar

Gràcia-Condal

Planes

et al. 2019

Phys. Rev. Materials

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We have studied the barocaloric properties associated with the martensitic transition of a shape memory Heulser alloy Ni50Mn31.5Ti18.5 which is composed of all-d-metal elements. The composition of the sample has been tailored to avoid long range ferromagnetic order in both ausenite and martensite. The lack of ferromagnetism results in a weak magnetic contribution to the total entropy change thereby leading to a large transition entropy change. The combination of such a large entropy change and a relatively large volume change at the martensitic transition gives rise to giant barocaloric properties in this alloy. When compared to other shape memory Heusler alloys, our material exhibits values for adiabatic temperature and isothermal entropy changes significantly larger than values reported so far for this class of materials. Furthermore, our Ni50Mn31.5Ti18.5 also compares favourably to the best state-of-the-art magnetic barocaloric materials.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Giant barocaloric effect in all- d -metal Heusler shape memory alloys

Aznar

Gràcia-Condal

Planes

et al. 2019

Phys. Rev. Materials

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“…1(b)] unambiguously indicates that it is most probable to achieve good mechanical properties in the NiMnTi system. Actually these NiMnTi alloys belong to the recently reported all-d-metal NiMnTi material family [53,54].…”

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confidence: 99%

Colossal Elastocaloric Effect in Ferroelastic Ni-Mn-Ti Alloys

et al. 2019

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Energy-efficient and environment-friendly elastocaloric refrigeration, which is a promising replacement of the conventional vapor-compression refrigeration, requires extraordinary elastocaloric properties. Hitherto the largest elastocaloric effect is obtained in small-size films and wires of the prototype NiTi system. Here, we report a colossal elastocaloric effect, well exceeding that of NiTi alloys, in a class of bulk polycrystalline NiMn-based materials designed with the criterion of simultaneously having large volume change across phase transition and good mechanical properties. The reversible adiabatic temperature change reaches a strikingly high value of 31.5 K and the isothermal entropy change is as large as 45 J kg −1 K −1 . The achievement of such a colossal elastocaloric effect in bulk polycrystalline materials should push a significant step forward towards large-scale elastocaloric refrigeration applications. Moreover, our design strategy may inspire the discovery of giant caloric effects in a broad range of ferroelastic materials.

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“…Recently, a reversible eC effect has been achieved in NiMnTi(Co) MSMAs by adding Co into ternary NiMnTi systems . The materials belong to the all‐d‐metal Heusler alloys fully composed of transition metal (d‐metal) elements . In all‐d‐metal MSMAs, the d‐d bonding between different d‐metal elements not only stabilizes a phase structure but also leads to an ordered structure, which is vital to tune phase transition .…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric and Elastocaloric Effects in All‐d‐Metal Ni₃₇Co₉Fe₄Mn₃₅Ti₁₅ Magnetic Shape Memory Alloy

Liu

Xuan

Cao

et al. 2019

Physica Status Solidi (a)

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The magnetocaloric effect and the elastocaloric effect in a polycrystalline all‐d‐metal Ni37Co9Fe4Mn35Ti15 magnetic shape memory alloy are investigated. The alloy undergoes a transition from ferromagnetic austenite to weak‐magnetic martensite near room temperature. It exhibits a maximum magnetic entropy change of 8.4 J Kg−1 K−1 under the magnetic field of 3 T. Moreover, a maximum temperature change of 6.3 K associated martensite transition is obtained at room temperature by loading the uniaxial stress of 400 MPa. These results suggest that the alloy is the promising candidate for new solid‐state refrigeration materials.

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Magnetostructural martensitic transformations with large volume changes and magneto-strains in all-d-metal Heusler alloys

Cited by 104 publications

References 41 publications

Giant barocaloric effect in all- d -metal Heusler shape memory alloys

Giant barocaloric effect in all- d -metal Heusler shape memory alloys

Colossal Elastocaloric Effect in Ferroelastic Ni-Mn-Ti Alloys

Magnetocaloric and Elastocaloric Effects in All‐d‐Metal Ni₃₇Co₉Fe₄Mn₃₅Ti₁₅ Magnetic Shape Memory Alloy

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Magnetostructural martensitic transformations with large volume changes and magneto-strains in all-d-metal Heusler alloys

Cited by 104 publications

References 41 publications

Giant barocaloric effect in all- d -metal Heusler shape memory alloys

Giant barocaloric effect in all- d -metal Heusler shape memory alloys

Colossal Elastocaloric Effect in Ferroelastic Ni-Mn-Ti Alloys

Magnetocaloric and Elastocaloric Effects in All‐d‐Metal Ni37Co9Fe4Mn35Ti15 Magnetic Shape Memory Alloy

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Product

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Magnetocaloric and Elastocaloric Effects in All‐d‐Metal Ni₃₇Co₉Fe₄Mn₃₅Ti₁₅ Magnetic Shape Memory Alloy