Journal of Magnetism and Magnetic Materials 242-245, 1097 (2002)

M. K. Krause, P. Esquinazi, M. Ziese, R. Höhne, A. Pan, A. Galkin and E. Zeldov

Abstract

With a μ-Hall sensor array we have studied the local behavior of the out-of-plane stray field component for different magnetic states in Fe₃O₄ thin films on MgAl₂O₄ and MgO substrates for fields applied parallel to the main surface. The results indicate a narrow field region where a nearly step-like response and Barkhausen jumps of the out-of-plane stray field are measured. The hysteresis of the local field and its amplitude depend on the magnetic state condition of the film.