Magneto-transport coupling in heterostructure thin films of BaTiO3–La0.7Sr0.3MnO3 deposited via pulsed laser deposition on LaAlO3 single crystal substrate

Ferromagnetic and ferroelectric composites also referred to as artificial multiferroic materials, which hold significant technological importance in sensing devices due to their magneto-transport coupling properties. This article delves into the magnetic and transport characteristics of heterostructure thin films composed of ferromagnetic La0.7Sr0.3MnO3 (LSMO) and ferroelectric BaTiO3 (BTO), grown using the pulsed laser deposition technique on a single-crystal LaAlO3 substrate. The transport measurements reveal insights into the resistance behavior and metal–insulator transition temperature variations with the addition of BTO thin film layers. In addition, the magnetic properties of LSMO are examined, focusing on the influence of temperature-dependent structural alterations of BTO. Notably, distinctive features, such as a hump in the magnetization-temperature graph, are observed, indicating intriguing phenomena within the heterostructure. Furthermore, the introduction of BTO layers atop LSMO leads to a notable reduction in the Curie temperature of LSMO thin films. Overall, this research sheds light on the enhanced magneto-transport coupling in BTO-LSMO heterostructure thin films, emphasizing their potential in advancing spintronic devices.