Abstract
Magnetic remanent states in a self-supporting 25-nm-thick magnetite (001) film containing antiphase domain boundaries (APB's) are investigated using off-axis electron holography in the transmission electron microscope. The observed magnetic microstructure is highly complicated and contains both domain walls and finer-scale magnetic variations. This complexity is attributed in part to a competition between exchange coupling across APB's and the demagnetizing energy of the thin film. Local variations in both the in-plane and out-of-plane components of the magnetic induction in the film are correlated with the positions of the APB's.
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