Controlling the spin-torque efficiency with ferroelectric barriers - Archive ouverte HAL Access content directly
Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2015

Controlling the spin-torque efficiency with ferroelectric barriers

(1) , (2) , (1)
1
2

Abstract

Nonequilibrium spin-dependent transport in magnetic tunnel junctions comprising a ferroelectric barrier is theoretically investigated. The exact solutions of the free electron Schrodinger equation for electron tunneling in the presence of interfacial screening are obtained by combining Bessel and Airy functions. We demonstrate that the spin transfer torque efficiency, and more generally the bias dependence of tunneling magneto- and electroresistance, can be controlled by switching the ferroelectric polarization of the barrier. In particular, the critical voltage at which the in-plane torque changes sign can be strongly enhanced or reduced depending on the direction of the ferroelectric polarization of the barrier. This effect provides a supplementary way to electrically control the current-driven dynamic states of the magnetization and relatedmagnetic noise in spin transfer devices.

Dates and versions

cea-01745395 , version 1 (28-03-2018)

Identifiers

Cite

A. Useinov, Mairbek Chshiev, Aurelien Manchon. Controlling the spin-torque efficiency with ferroelectric barriers. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 91, pp.064412. ⟨10.1103/PhysRevB.91.064412⟩. ⟨cea-01745395⟩
29 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More