首页|Large magnetocaloric effect and magnetoresistance in Fe-Co doped Ni50-x(FeCo)xMn37Ti13 all-d-metal Heusler alloys
Large magnetocaloric effect and magnetoresistance in Fe-Co doped Ni50-x(FeCo)xMn37Ti13 all-d-metal Heusler alloys
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NSTL
Elsevier
? 2022 Elsevier B.V.The effect of substituting FeCo in Ni site maintaining their same ratio on structural, magnetocaloric, and magneto-transport properties of all-d-metal Ni50-x(FeCo)xMn37Ti13 (x = 16, 18, and 20) Heusler alloys are investigated. These alloys undergo a first-order magnetostructural transition (MST) between low temperature weak magnetic martensite (monoclinic or orthorhombic structure) to a high temperature ferromagnetic (FM) austenite (cubic structure) phase around room temperature. The MST temperature is observed to shift towards the lower temperature with increasing (FeCo)x content. These alloys with x = 16, 18, and 20 exhibit isothermal magnetic entropy change (?SM) as large as about ~13.8, ~12.7 and ~11.8 JkgK?1 across their MST associated with an effective refrigerant capacity (RCeff) of about 119.9, ~126.2 and ~194.4 J/kg respectively due to an application of 5 T magnetic field. It is interesting to note that ?SM remains almost identical over a large temperature region with (FeCo)x content from 16 to 20 at%. In addition, the maximum values of large magnetoresistance (MR)~ ?26.1% for x = 16, ?25.4% for x = 18, and ?24.3% for x = 20 are achieved at the field of 5 T. These materials with large magnetocaloric response in an extended temperature window around room temperature as well as large negative MR can be considered as potential candidates for multifunctional application.
All-d-metal Heusler alloyMagnetocaloric effectMagnetoresistanceMagnetostructural transitionRelative cooling power
Samanta S.、Ghosh S.、Chatterjee S.、Mandal K.
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Magnetism Laboratory Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences
NSTL
Elsevier
