Cubic Mn 2 Ga Thin films: Crossing the spin gap with ruthenium
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2014Access:
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Kurt, H., Rode, K., Stamenov, P., (...), Fonda, E., Coey, J.M.D., Cubic Mn 2 Ga Thin films: Crossing the spin gap with ruthenium, Physical Review Letters, 112, 2, 2014, Article number 027201Download Item:
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Abstract:
Cubic Mn2Ga films with the half-Heusler C1b structure are grown on V (001) epitaxial films. The phase is a soft ferrimagnet, with Curie temperature TC = 225 K and magnetization Ms=280 kA m−1, equivalent to 1.65μB per formula. Adding ruthenium leads to an increase of TC up to 550 K in cubic Mn2RuxGa films with x = 0.33 and a collapse of the net magnetization. The anomalous Hall effect changes sign at x = 0.5, where the sign of the magnetization changes and the magnetic easy direction flips from in plane to perpendicular to the film. The Mn2Ru0.5Ga compound with a valence electron count of 21 is identified as a zero-moment ferrimagnet with high spin polarization, which shows evidence of half-metallicity.
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Science Foundation Ireland (SFI)
10/IN1.13006
Author's Homepage:
http://people.tcd.ie/stamenphttp://people.tcd.ie/rodek
http://people.tcd.ie/jcoey
http://people.tcd.ie/venkatem
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Physical Review Letters112
2
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Cubic Mn2Ga filmsDOI:
http://dx.doi.org/10.1103/PhysRevLett.112.027201Licences: