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Electric field-driven magnetocrystalline anisotropy switching of Fe/MgO: Towards full understanding from first principles
| Content Provider | Semantic Scholar |
|---|---|
| Author | Nakamura, Kohji Akiyama, Toru Ito, Tomonori Weinert, M. Freeman, Arthur J. |
| Copyright Year | 2010 |
| Abstract | Submitted for the MAR10 Meeting of The American Physical Society Electric field-driven magnetocrystalline anisotropy switching of Fe/MgO: Towards full understanding from first principles K. NAKAMURA, T. AKIYAMA, T. ITO, Mie University, M. WEINERT, University of WisconsinMilwaukee, A.J. FREEMAN, Northwestern University — Controlling magnetic properties by an external electric field (E-field) is a key challenge in modern magnetic physics. Here, we investigate the magnetocrystalline anisotropy (MCA) modification by an E-field for thin films of Fe on a MgO substrate from first principles. Calculations were carried out by using the film FLAPW method1 with full optimization by atomic force calculations in which an E-field effect is incorporated.2 Results predict that the Fe/MgO interface gives rise to a large out-of-plane MCA due to an Fe-O hybridization at the interface and a MCA modification is induced by a change in the d-band structures at the Fermi level when an E-field is introduced. Importantly, however, the existence of an interfacial ironoxide layer between the Fe layer and the MgO substrate is found to play a key role in demonstrating an electric field-driven MCA switching, i.e., from out-of-plane MCA to in-plane MCA — as observed in experiments.3 1Wimmer, Krakauer, Weinert, and Freeman, PRB 24, 864 (1981). 2Nakamura et al., PRL 102, 18702 (2009); Weinert et al., J. Phys.: Condens. Matter 21, 084201 (2009). 3Shiota et al., Appl. Phys. Express 2, 063001 (2009). Kohji Nakamura Mie University Date submitted: 18 Nov 2009 Electronic form version 1.4 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://absimage.aps.org/image/MAR10/MWS_MAR10-2009-002136.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
