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Paper detail

High spin polarization in CoFeMnGe quaternary Heusler alloy

We report the structure, magnetic property and spin polarization of CoFeMnGe equiatomic quaternary Heusler alloy. The alloy was found to exist in the L21 structure with considerable amount of DO3 disorder. Thermal analysis result indicated the Curie temperature is about 711K without any other phase transformation up to melting temperature. The magnetization value was close to that predicted by the Slater-Pauling curve. Current spin polarization of P = 0.70 {plus/minus}0.1 was deduced using point contact Andreev reflection (PCAR) measurements. Half-metallic trend in the resistivity has also been observed in the temperature range of 5 K to 300 K. Considering the high spin polarization and Curie temperature, this material appears to be promising for spintronic applications.

preprint2014arXivOpen access
Lakhan BainslaK. G. SureshA. K. NigamM. Manivel RajaB. S. D. Ch. S. VaraprasadY. K. TakahashiK. Hono
cond-mat.mtrl-sci
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Lakhan BainslaK. G. SureshA. K. NigamM. Manivel RajaB. S. D. Ch. S. VaraprasadY. K. TakahashiK. Hono

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