Short-Range Effects and Magnetization Reversal in Co80 Fe20 Thin Films: A MOKE Magnetometry/ Domain Imaging and AMR Study

Abstract:

Article Preview

A MOKE magnetometry unit simultaneously sensitive to both in-plane magnetization components, based on an intensity differential detection method, allows us to observe the uniaxial anisotropy impressed during CoFe-deposition and to discriminate the magnetization processes under a magnetic field parallel and perpendicular to such axes. Our MOKE imaging unit, using a CCD camera for Kerr effect domain visualization provides direct evidence on the dominant M-processes, namely domain wall motion and moment rotation. Further magnetic information was obtained by AMR measurements due to the dependence of the electrical resistivity on the short-range spin disorder and also on the angle between the electrical current direction (I) and the spontaneous magnetization (MS).

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

1145-1149

DOI:

10.4028/www.scientific.net/MSF.514-516.1145

Citation:

J. M. Teixeira et al., "Short-Range Effects and Magnetization Reversal in Co80 Fe20 Thin Films: A MOKE Magnetometry/ Domain Imaging and AMR Study", Materials Science Forum, Vols. 514-516, pp. 1145-1149, 2006

Online since:

May 2006

Export:

Price:

$35.00

[1] Wohlfarth, Ferromagnetic Materials; vol. 2, North-Holland Company New York (1980).

[2] J. S. Moodera, L. R. Kinder, T. M. Wong and R. Meservey, Phys. Rev. Lett. 74, 3273 (1995).

[3] J. B. Sousa et al., J. Appl. Phys. 91, 5321 (2002).

[4] J. O. Ventura et al., J. Magn. Magn. Mat. 272-276, 1892 (2004).

[5] D. Song, J. Nowak, R. Larson, P. Kolbo, R. Chellew, IEEE Trans. Magn. 36 2545 (2000).

DOI: 10.1109/20.908503

[6] S. Tehraniet al., IEEE Trans. Magn. 36 2752 (2000).

[7] T. R. McGuire and R. I. Potter, IEEE Trans. Magn. 11, 1018 (1975).

[8] C. Daboo et al., Phys. Rev. B. 47, 11852 (1993).

[9] J. M. Florczak and E. Dan Dahlberg, J. Appl. Phys. 67, 7520 (1990).

[10] V. Gehanno et al., IEEE Trans. Magn. 35, 4361 (1999).

[11] Alex Hubert and Rudolf Schafer, Magnetic Domains, Springer (1998).

[12] J. M. Teixeira et al., Mat. Sci. Eng. B, in press.

[13] P.G. De Gennes and J. Friedel, J. of Phys. Chem. Solids. 4, 71 (1958).

In order to see related information, you need to Login.