Showing papers by "David P. Norton published in 2016"
TL;DR: In this paper, high quality epitaxial Ba2FeMoO6 thin films and superlattice structures were grown via pulsed laser deposition under low oxygen pressure, and their structural, magnetic, and magneto-transport properties were examined.
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 prop...
5 citations
TL;DR: In this paper, superlattice structures of Ba2FeMoO6/Ba0.5Sr0.3 were grown via pulsed laser deposition on high quality ultra-smooth SrTiO3 substrates.
Abstract: Superlattice (SL) structures of Ba2FeMoO6/Ba0.5Sr0.5TiO3 were grown via pulsed laser deposition on high quality ultra-smooth SrTiO3 substrates. N number of ferroelectric Ba0.5Sr0.5TiO3 layers were grown on five layers of ferromagnetic Ba2FeMoO6 and their structural, magnetic, transport, and magneto-transport properties were examined, focusing on the effects of superlattice periodicity of Ba0.5Sr0.5TiO3 layers. XRD analysis of SLs proved their layered superlattice structure. Magnetic study of the SLs showed increment of saturation magnetization and decrease of Curie temperature when compared to magnetization of pure Ba2FeMoO6 thin film. Magneto-transport measurement showed the presence of negative magneto-resistance in all superlattice samples, similar to magneto-transport behavior of pure Ba2FeMoO6 thin film. Hall measurement and transport study showed a consistent increment of anomalous Hall effect and temperature dependent conductivity, respectively, with the number of Ba0.5Sr0.5TiO3 layers.
4 citations