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Tilted Anisotropy

The use of a spin polarizing layer with a tilted magnetization for use in spin torque oscillators has been recently proposed. Here, the fixed layer magnetization is tilted out of the film plane in order to simultaneously achieve zero-field operation without the need for additional read out layers and high output power. Varying the tilt angle introduces an additional degree of freedom and leads to a rich phase diagram of spin transfer torque switching and precession.

Our approach relies on taking advantage of the competition between materials with distinct anisotropy directions. For example, by exchange coupling a NiFe layer with dominant in-plane shape anisotropy with a [Co/Pd] multilayer with perpendicular anisotropy a highly tunable range of tilt angles can be achieved.

Page Manager: Måns Henningson|Last update: 9/16/2015
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