Abstract

High quality epitaxial Ba2FeMoO6 thin films and Ba2FeMoO6–(BaxSr1−x)TiO3 bi-layer (BL) and superlattice (SL) structures were grown via pulsed laser deposition under low oxygen pressure, and their structural, magnetic, and magneto-transport properties were examined. Superlattice and bi-layer structures were confirmed by X-ray diffraction patterns. Low temperature magnetic measurement shows that the saturation magnetization (MS) is significantly higher for SLs and almost similar or lower for BLs, when compared to phase pure Ba2FeMoO6 thin films. The variation of the coercive field (HC) follows exact opposite trend, where BL samples have higher HC and SL samples have lower HC than pure Ba2FeMoO6 thin films. Also, a significant decrease of the Curie temperature is found in both BL and SL structures compared to pure Ba2FeMoO6 thin films. Negative magneto-resistance is seen in all the BL and SL structures as well as in pure Ba2FeMoO6 thin films. In contrast to the magnetic properties, the magneto-transport properties do not show much variation with induced strain.

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