Spin transfer in ultrathin BiFeO3 film under external electric field
Department of Physics, Northwest University - Xi'an 710069, PRC
Received: 28 December 2012
Accepted: 7 March 2013
First-principles calculations show that spin-up and spin-down carriers accumulate adjacent to the opposite surfaces of a BiFeO3 (BFO) film upon applying an external bias. The spin carriers are equal in magnitude and opposite in direction, and spin-down carriers move in the direction opposite to the external electric field while spin-up ones move along the field direction. This novel spin transfer properties make the BFO film an intriguing candidate for application in spin capacitors and BFO-based multiferroic field-effect devices.
PACS: 73.61.-r – Electrical properties of specific thin films / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 71.15.Mb – Density functional theory, local density approximation, gradient and other corrections
© EPLA, 2013