Tuning the magnetism of the Heusler alloys Mn3-xCoxGa from soft and 
half-metallic to hard-magnetic for spin-transfer torque applications

Alijani, Vajiheh; Winterlik, Juergen; Fecher, Gerhard H.; Felser, Claudia

doi:10.1063/1.3665260

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Tuning the magnetism of the Heusler alloys Mn_3-xCo_xGa from soft and half-metallic to hard-magnetic for spin-transfer torque applications

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Alijani, V., Winterlik, J., Fecher, G. H., & Felser, C. (2011). Tuning the magnetism of the Heusler alloys Mn_3-xCo_xGa from soft and half-metallic to hard-magnetic for spin-transfer torque applications. Applied Physics Letters, 99(22): 222510, pp. 1-3. doi:10.1063/1.3665260.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-B59B-9

Abstract

The magnetic properties of Mn3-xCoxGa Heusler alloys exhibit a very interesting feature. While the Mn-rich alloys (x = 0.1-0.4) are similar to Mn3Ga as they crystallize in a tetragonally distorted variation of the Heusler structure and exhibit comparable hard-ferrimagnetic properties highly useful for spin-transfer torque applications, the Co-rich samples (x = 0.6-1) exhibit cubic Heusler structures, have soft-magnetic hysteresis loops, and follow the generalized Slater-Pauling curve indicating half-metallic ferrimagnetism. The Curie temperatures of all alloys are above 700 K allowing for high operating temperatures. (C) 2011 American Institute of Physics. [doi:10.1063/1.3665260]