Effect of Ni-Mn ratio on structural, martensitic and magnetic properties of Ni-Mn-Co-Ti ferromagnetic shape memory alloys

Hassan, Najam Ul; Shah, Ishfaq Ahmad; Jelani, Mohsan; Naeem, Muhammad; Riaz, Saira; Naseem, Shahzad; Xu, Feng; Ullah, Zaka

doi:10.1088/2053-1591/aad124

Cited by 4 publications

(6 citation statements)

References 37 publications

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“…It can be seen that with 1% doping of Sm, the work perature of the NiMnSn alloy increased to 266 from ~205 K, showing potential f netic refrigeration applications near RT. Moreover, the ∆SM obtained for Ni43Mn45S 266 K is comparable to many other first-order magnetocaloric materials [16,34,39…”

Section: Resultssupporting

confidence: 72%

“…Many investigations on FMSMA alloys show that the composition of the constituents influences the T t . The results reveal that the valance electron concentration (e/a) is the most significant factor affecting the martensitic transformation, and that there is a linear relationship between the T t and e/a [34]. The second important factor that affects the MT is the change in the matrix composition.…”

Section: Resultsmentioning

confidence: 99%

“…Here, a small deviation in the composition of the elements is very common due to various factors such as weighing the precursor elements, melting and annealing. The electronic concentration (e/a) was measured using Equation (1) [34]. e/a = (7 × at.…”

Section: Resultsmentioning

confidence: 99%

“…The stability of the martensite temperature is a key factor in the application temperature of FMSMAs based on twin boundary migration [34]. Therefore, it is very important to tune the T t temperature in a wide stable temperature range.…”

Section: Resultsmentioning

confidence: 99%

“…The refrigeration capacity (RC) is a very important factor to assess the MCE be calculated by integration of the area under the ∆SM-T curves, using the tempe half maximum of the peak as the upper and lower integration limits [34]. The ca RC for the Ni43Mn45SmSn11 alloy under the 5 T field was 262 J•Kg -1 .…”

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confidence: 99%

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Tunable Martensitic Transformation and Magnetic Properties of Sm-Doped NiMnSn Ferromagnetic Shape Memory Alloys

et al. 2021

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NiMnSn ferromagnetic shape memory alloys exhibit martensitic transformation at low temperatures, restricting their applications. Therefore, this is a key factor in improving the martensitic transformation temperature, which is effectively carried out by proper element doping. In this research, we investigated the martensitic transformation and magnetic properties of Ni43Mn46-x SmxSn11 (x = 0, 1, 2, 3) alloys on the basis of structural and magnetic measurements. X-ray diffraction showed that the crystal structure transforms from the cubic L21 to the orthorhombic martensite and gamma (γ) phases. The reverse martensitic and martensitic transformations were indicated by exothermic and endothermic peaks in differential scanning calorimetry. The martensitic transformation temperature increased considerably with Sm doping and exceeded room temperature for Sm = 3 at. %. The Ni43Mn45SmSn11 alloy exhibited magnetostructural transformation, leading to a large magnetocaloric effect near room temperature. The existence of thermal hysteresis and the metamagnetic behavior of Ni43Mn45SmSn11 confirm the first-order magnetostructural transition. The magnetic entropy change reached 20 J·kg−1·K−1 at 266 K, and the refrigeration capacity reached ~162 J·Kg−1, for Ni43Mn45SmSn11 under a magnetic field variation of 0–5 T.

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Section: Resultssupporting

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Tunable Martensitic Transformation and Magnetic Properties of Sm-Doped NiMnSn Ferromagnetic Shape Memory Alloys

et al. 2021

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Microstructural Evolution and Applied Performance of a Highly Undercooled Bulk Ni-5% Cu Alloy

Yan

2022

J. of Materi Eng and Perform

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All-d-Metal Full Heusler Alloys: A Novel Class of Functional Materials

Paula

Reis

2021

Chem. Mater.

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Full Heusler alloys display a wide range of physical phenomena with potential applications in different areas. However, researchers still struggle to overcome many limiting factors to optimize their functional properties. Particularly, the poor mechanical properties of the X 2 YZ series undermine its exploration as shape memory alloys and solid-state cooling materials. Recently, the suppression of p−d covalent hybridization characteristic of these alloys came up as a promising approach, resulting in novel compounds displaying enhanced mechanical properties and large caloric effects. These materials have been named all-d-metal Heusler alloys. We discuss this advanced functional behavior in light of the recent theoretical and experimental findings. Moreover, we point out some open questions suggesting different pathways to guide further research on this topic.

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Effect of Ni-Mn ratio on structural, martensitic and magnetic properties of Ni-Mn-Co-Ti ferromagnetic shape memory alloys

Cited by 4 publications

References 37 publications

Tunable Martensitic Transformation and Magnetic Properties of Sm-Doped NiMnSn Ferromagnetic Shape Memory Alloys

Tunable Martensitic Transformation and Magnetic Properties of Sm-Doped NiMnSn Ferromagnetic Shape Memory Alloys

Microstructural Evolution and Applied Performance of a Highly Undercooled Bulk Ni-5% Cu Alloy

All-d-Metal Full Heusler Alloys: A Novel Class of Functional Materials

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