title: Changing exchange bias in spin valves with an electric current.
abstract: We show that a high-density electric current, injected from a point contact into an exchange-biased spin valve, systematically changes the exchange bias. The bias can either increase or decrease depending upon the current direction. This observation is not readily explained by the well-known spin-transfer torque effect in ferromagnetic metal circuits, but could be evidence for the recently predicted current-induced torques in antiferromagnetic metals.
authors.affiliation: Physics Department, University of Texas at Austin, Austin, Texas 78712, USA.
authors.forename: Z
authors.initials: Z
authors.lastname: Wei
authors.forename: A
authors.initials: A
authors.lastname: Sharma
authors.forename: A S
authors.initials: AS
authors.lastname: Nunez
authors.forename: P M
authors.initials: PM
authors.lastname: Haney
authors.forename: R A
authors.initials: RA
authors.lastname: Duine
authors.forename: J
authors.initials: J
authors.lastname: Bass
authors.forename: A H
authors.initials: AH
authors.lastname: MacDonald
authors.forename: M
authors.initials: M
authors.lastname: Tsoi