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Ferromagnetic MnGaN thin films with perpendicular magnetic anisotropy for spintronics applications.
- Source :
-
Applied Physics Letters . 7/22/2015, Vol. 107 Issue 3, p1-5. 5p. 2 Color Photographs, 3 Graphs. - Publication Year :
- 2015
-
Abstract
- Perpendicularly magnetized flat thin films of antiperovskite Mn67Ga24N9 were grown on an MgO(001) substrate by reactive sputtering using an argon/1% nitrogen gas mixture and a Mn70Ga30 target. The films showed a saturation magnetization of 80-100kA/m, an effective perpendicular magnetic anisotropy (PMA) energy of 0.1-0.2MJ/m³, and a Curie temperature of 660-740K. Upon increasing the N composition, the films transformed from ferromagnetic to antiferromagnetic as expected in the stoichiometric Mn3 GaN phase. Point contact Andreev reflection spectroscopy revealed that the ferromagnetic MnGaN has a current spin polarization of 57%, which is comparable to D022-MnGa. These findings suggest that MnGaN is a promising PMA layer for future spintronics devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 107
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 108546805
- Full Text :
- https://doi.org/10.1063/1.4927097