1. Experimental inspection of a computationally-designed NiCrMnSi Heusler alloy with high Curie temperature
- Author
-
Masahito Tsujikawa, Kenta Yoshida, Yuta Onodera, Kelvin Elphick, Takuro Kanemura, Tomoki Tsuchiya, Tufan Roy, Yasuyoshi Nagai, Masafumi Shirai, Atsufumi Hirohata, and Shigemi Mizukami
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,Condensed matter physics ,Co element ,Alloy ,General Engineering ,General Physics and Astronomy ,Sputter deposition ,engineering.material ,Tunnel magnetoresistance ,Phase (matter) ,Metastability ,engineering ,Curie temperature - Abstract
Nowadays advanced magnetic tunnel junction applications demand very high tunnel magnetoresistance at room temperature, thus it is quite important to explore high Curie temperature Tc half-metallic Heusler alloys. In this article rst-principles calculation unveiled that NiCrMnSi has Tc of 1200 K comparable to that of the traditional Co2MnSi Heusler alloys, even though it does not contain Co element. In addition, we examined whether NiCrMnSi Heulser phase lms can be obtained by a magnetron sputtering on MgO substrates. The results of the structural analysis and rst-principles calculations indicated that NiCrMnSi Heusler phase is metastable. A possible route to obtain metastable NiCrMnSi Heusler alloy is to utilize appropriate templates.
- Published
- 2020