Influence of intermetallic Fe and Co on crystal structure disorder and magnetic property of Ni50Mn32Al18 Heusler alloy

8th International Conference on Physics and its Applications

Notonegoro, H.A.^1,2 ; Kurniawan, B.^1 ; Setiawan, J.^3 ; Nanto, D.^4 ; Manaf, A.^1

PPS Materials Science, FMIPA-Universitas Indonesia, Depok

16424, Indonesia^1

Mechanical Engineering Dept., FT-Universitas Sultan Ageng Tirtayasa, Cilegon

42435, Indonesia^2

Center for Nuclear Fuel Tecnology-Badan Tenaga Nuklir Nasional, Tangerang Selatan

15310, Indonesia^3

Dept. of Physics Education, UIN Syarif Hidayatullah, Jakarta

15412, Indonesia^4

关键词: Al sample;    Argon atmospheres;    Fe and Co;    Heusler alloys;    High purity;    Magnetocaloric effect (MCE);    X-ray diffraction investigations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/776/1/012016/pdf
DOI  :  10.1088/1742-6596/776/1/012016

来源: IOP

【 摘 要 】

This works reports a study on structure and magnetic properties influenced by both Fe and Co on Ni50Mn32Al18Heusler alloy as a candidate of magnetocaloric effect (MCE) materials. The Ni-Fe-Mn-Co-Al sample was prepared by arc melting furnace (AMF) in high purity argon atmosphere. X-ray diffraction investigation and magnetic hysteresis were conducted to characterize the synthesized sample. X-ray diffraction using Cu-Kα pattern shows that both Fe and Co introduce a tungsten type disorder of Ni50Mn32Al18Heusler alloy which partially replace the site position of Ni and Mn respectively. However, in this tungsten type disorder, it is difficult to distinguish the exact position of each constituent atom. Therefore, we believe it may allow any exchange interaction of each electron possessed the atom. Interestingly, it produced a significant increase in the value of the hysteresis magnetic saturation.