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.

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2842

Lastpage

2844

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 R_s~rhoⁿ between the extraordinary Hall coefficient R_s 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 R_s~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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.892177

Filename

4202790