R.F.C. Farrow, S.S.P. Parkin, et al.
Applied Physics Letters
We compare the blocking temperature for simple permalloy (80% Ni)/Au/permalloy/NiO spin valves with and without an interfacial, oxidized Fe layer (Fe layer 12 Å thick) inserted at the permalloy/NiO interface. We find a significantly increased blocking temperature and pinning field for spin valves with the interfacial Fe-oxide layer, as a result of moderate (230 °C/1 h) annealing of the Au/permalloy/Fe-oxide/NiO part of the spin valve. High resolution transmission electron microscopy and electron energy loss microanalysis reveal that the Fe-oxide layer is converted to a cubic spinel ferrite (Ni0.8Fe2.2O4) layer by solid state reaction with the NiO. © 2000 American Institute of Physics.
R.F.C. Farrow, S.S.P. Parkin, et al.
Applied Physics Letters
J.R. Childress, M.J. Carey, et al.
IEEE Transactions on Magnetics
G.R. Harp, S.S.P. Parkin, et al.
MRS Spring Meeting 1993
Ganping Ju, A.V. Nurmikko, et al.
Physical Review Letters