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Spin transfer in ultrathin BiFeO3 film under external electric field

First-principals calculations show that up-spin and down-spin carriers are accumulating adjacent to opposite surfaces of BiFeO3(BFO) film with applying external bias. The spin carriers are equal in magnitude and opposite in direction, and down-spin carriers move to the direction opposing the external electric field while up-spin ones along the field direction. This novel spin transfer properties make BFO film an intriguing candidate for application in spin capacitor and BFO-based multiferroic field-effect device.

preprint2013arXivOpen access
Hong-Jian Feng
cond-mat.mtrl-sci
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Hong-Jian Feng

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