Abstract
Oxide multilayer hetero‐structure of BaFeO3‐KTa0.47Nb0.53O3 have been grown using the pulsed laser deposition and the ex situ annealed in a flowing oxygen atmosphere. The multilayer has been characterized using X‐ray diffraction, transmission electron microscopy, and X‐ray photoelectron spectroscopy. Magnetic properties have been studied via SQUID measurements. Magnetization in the multilayer structure shows significant improvement compared to previous measurements of bare BaFeO3. Measuring magnetization as a function of temperature and fitting the resulting M–T curves to Bloch's 3/2 law, yields an estimated Curie temperature (TC) of around 425 K and a P factor of around 1.5, consistent with magnetization from a three dimensional crystal structure. In spite of using a room temperature ferroelectric KTa0.47Nb0.53O3 composition, no evidence of ferroelectricity was observed in multi‐layer structure.
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