Heterostructures For Realizing Magnon-Induced Spin Transfer Torque

Jayathilaka, P. B.
Monti, M. C.
Markert, J. T.
Miller, C. W.
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This work reports efforts fabricating heterostructures of different materials relevant for the realization of magnon-induced spin transfer torques. We find the growth of high-quality magnetite on MgO substrates to be straightforward, while using transition metal buffer layers of Fe, Cr, Mo, and Nb can alter the structural and magnetic properties of the magnetite. Additionally, we successfully fabricated and characterized Py/Cr/Fe3O4 and Fe3O4/Cr/Fe3O4 spin valve structures. For both, we observe a relatively small giant magnetoresistance and confirman inverse dependence on spacer layer thickness. Thus, we have shown certainmaterials combinations that may form the heterostructures that are the building blocks necessary to achieve magnon-induced spin transfer torque devices.

P. B. Jayathilaka, M. C. Monti, J. T. Markert, and Casey W. Miller. Advances in Condensed Matter Physics, Vol. 2012, Article ID 168313, 7 pages. doi:10.1155/2012/168313