Open AccessHeterostructures for Realizing Magnon-Induced Spin Transfer Torque
Author(s) -
Priyanga Jayathilaka,
Mark C. Monti,
J. T. Markert,
Casey W. Miller
Publication year - 2012
Publication title -
advances in condensed matter physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.314
H-Index - 26
eISSN - 1687-8124
pISSN - 1687-8108
DOI - 10.1155/2012/168313
Subject(s) - heterojunction , magnon , magnetite , materials science , condensed matter physics , realization (probability) , spin (aerodynamics) , magnetoresistance , spin transfer torque , transition metal , spintronics , giant magnetoresistance , spin valve , layer (electronics) , ferromagnetism , nanotechnology , optoelectronics , magnetization , magnetic field , physics , chemistry , metallurgy , thermodynamics , quantum mechanics , catalysis , biochemistry , statistics , mathematics
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 confirm an inverse dependence on spacer layer thickness. Thus, we have shown certain materials combinations that may form the heterostructures that are the building blocks necessary to achieve magnon-induced spin transfer torque devices
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