Current-controlled magnetization dynamics in the spin-flip transistor

Details Current-controlled magnetization dynamics in the spin-flip transistor Current-controlled magnetization dynamics in the spin-flip transistor

2006-01-27

arxiv.org/abs/cond-mat/0601632v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted by JJAP special issue on Magnetization Dynamics in Spintronic Structures and Devices

Scientific paper

10.1143/JJAP.45.3863

The current driven magnetization dynamics of a thin-film, three magnetic terminal device (spin-flip transistor) is investigated theoretically. We consider a magnetization configuration in which all magnetizations are in the device plane, with source-drain magnetizations chosen fixed and antiparallel, whereas the third contact magnetization is allowed to move in a weak anisotropy field that guarantees thermal stability of the equilibrium structure at room temperature. We analyze the magnetization dynamics of the free layer under a dc source-drain bias current within the macrospin model and magneto-electronic circuit theory. A new tunable two-state behavior of the magnetization is found and the advantages of this phenomenon and potential applications are discussed.

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