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Magnetocaloric properties in a FeNiGaMnSi high entropy alloy
Kagan Sarlar,Atakan Tekgül,Ilker Kucuk 한국물리학회 2020 Current Applied Physics Vol.20 No.1
We investigated a new Fe26.7Ni26.7Ga15.6Mn20Si11 high entropy alloy (HEA) without the rare earth element. The structural, magnetic and magnetocaloric properties of the resulting materials are presented. The HEAs successfully is produced by the arc melting with suction casting method. The crystal structures are characterised through multiphase Rietveld refinement of X-ray diffraction data. The structure of the HEAs was found to be the body centred cubic (bcc). In the magnetic measurements, the ferromagnetic to paramagnetic transition was obtained in the range of 300–400 K. With the employed suction casting method; the Fe26.7Ni26.7Ga15.6Mn20Si11 HEA shows the best magnetocaloric properties as 1.59 Jkg−1K−1 maximum magnetic entropy change (0–2 T) and 75.68 Jkg-1 refrigeration capacity after the annealing process.