Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3665260
Keywords
cobalt alloys; Curie temperature; ferrimagnetic materials; gallium alloys; magnetic hysteresis; manganese alloys
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Funding
- Deutsche ForschungsGemeinschaft DfG [TP 1.2-A, TP 2.3-A, FOR 1464 ASPIMATT]
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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]
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