Title :
Comparison Between Top and Bottom NiO-Pinning Spin Valves: Correlation Between the Extraordinary Hall Effect and Resistivity
Author :
Zhang, J. ; Du, J. ; Bai, X.J. ; Sun, L. ; You, B. ; Wu, X.S. ; Sang, H. ; Hu, A. ; Zhou, S.M. ; Xiao, J.Q.
Author_Institution :
Dept. of Phys., Nanjing Univ.
fDate :
6/1/2007 12:00:00 AM
Abstract :
Comparison of the extraordinary Hall effect (EHE) on top and bottom NiO-pinning Co/Cu/Co spin valves (SVs), has been made in order to investigate the relationship Rs~rhon between the extraordinary Hall coefficient Rs and the resistivity rho. Bottom and top spin valves have stronger and weaker specular reflection effects which mainly originate from smoother and rougher Co/NiO interface, respectively. The scaling law Rs~rho2, which implies that the side-jump mechanism is the dominant scattering process, works fairly well (n=1.93plusmn0.02) in the bottom NiO-pinning spin valve, while it deviates much (n=1.32plusmn0.04) in the top one
Keywords :
Hall effect; cobalt; copper; ferromagnetic materials; giant magnetoresistance; nickel compounds; spin valves; NiO-Co-Cu-Co; extraordinary Hall effect; pinning spin valves; resistivity; scattering process; specular reflection effects; Conductivity; Giant magnetoresistance; Hall effect; Laboratories; Nonhomogeneous media; Physics; Reflection; Spin valves; Superlattices; Temperature distribution; Extraordinary Hall effect; giant magnetoresistance; specular reflection; spin valve;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.892177
