Wednesday, December 5, 2012

1108.4043 (M. S. Gabor et al.)

Magnetic and structural anisotropies of Co2FeAl Heusler alloy epitaxial
thin ?lms

M. S. Gabor, T. Petrisor Jr., C. Tiusan, M. Hehn, T. Petrisor
This paper shows the correlation between chemical order, lattice strains and magnetic properties of Heusler Co2FeAl ?lms epitaxially grown on MgO(001). A detailed magnetic characterization has been performed using vector ?eld magnetometery combined with numerical Stoner-Wohlfarth analysis. We demonstrate the presence of three types of in-plane anisotropies: one biaxial, as expected for the cubic symmetry, and other two uniaxial ones. The three anisotropies show di?erent behavior with the annealing temperature. The biaxial anisotropy shows a monotonous increase. The uniaxial anisotropy, parallel with the hard biaxial axes, related to the chemical homogeneity, decreases, while the other, supposed to have magnetostatic origin, remains constant.
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