Anisotropic giant magnetoresistance in granular CoAg films
J MAGN MAGN MATER 165:1-3 (1997) 323-325
Abstract:
We present magnetisation and giant magnetoresistance (GMR) measurements for MBE grown CoAg granular films with the external field applied parallel and perpendicular to the film plane. Both the magnetisation and the GMR show uniaxial anisotropy with the easy axis of magnetisation out-of-plane for Co concentrations of 30 at% and less and in the film plane for higher Co concentrations. We attribute this behaviour to the shape anisotropy of the magnetic particles in the films.The ferromagnetic domain wall as a GMR trilayer
J MAGN MAGN MATER 165:1-3 (1997) 121-124
Abstract:
By exploiting the simplicity of a novel transport measurement on a ferromagnetic striped domain structure in a thin film of cobalt, we report the first direct observation of ferromagnetic domain wall scattering and what we believe to be the first clear indication of giant magnetoresistive effects (GMR) in a homogeneous magnetic system. A new model is proposed to describe these observations which highlights the crucial role played by electron spin precession in determining the electrical transport properties of magnetic interfaces.Magnetic anisotropy in giant magnetoresistive CoAg granular films
JOURNAL OF APPLIED PHYSICS 81:8 (1997) 5207-5207
Jitterbug spin channel mixing in heterogeneous giant magnetoresistive material
J APPL PHYS 79:8 (1996) 5593-5595
Abstract:
A mechanism is described which considers the effect of small magnetic particles on the spin diffusion length in a granular giant magnetoresistive material. Spin depolarization occurs by precession of the spin orientation of the carrier due to the s-d exchange interaction within a magnetic particle. Numerical simulation of this jitterbug effect is found to generate a temperature and field dependence of the distance a carrier may travel within the sample without losing its spin memory. (C) 1996 American Institute of Physics.Structural characterization of epitaxial Co-Ag
J APPL PHYS 79:8 (1996) 6247-6249