Multiferroic thin film via SrRuO3–BaTiO3 vertically aligned nanocomposite design

Abstract

The design of a nanocomposite system with a ferroelectric phase and a ferromagnetic phase is essential to achieve multiferroics due to the limited one-phase multiferroic material in nature. Ferromagnetic SrRuO3 (SRO) and ferroelectric BaTiO3 (BTO) have been selected to achieve the SRO-BTO nanocomposite thin film. The film exhibits excellent crystal quality owing to the perfect lattice matching of both phases with the SrTiO3 substrate, and very thin SRO nanopillars (∼5 nm) have been obtained. Because of the anisotropic nature of the SRO nanopillars, magnetic anisotropy has been obtained for the nanocomposite thin film, and the Curie temperature (Tc) can be determined to be 152 K. Furthermore, switchable piezoelectric behavior of the nanocomposite film with a maximum d33 value of ∼70 pm/V is obtained by the piezoelectric force microscopy measurement. Overall, the SRO-BTO nanocomposite system presents the desirable multiferroic response, which is promising for future magnetoelectric device integration.

Strategies To Construct n-Type Si-Based Heterojunctions for Photoelectrochemical Water Oxidation

“…Thus, a high-quality Schottky junction can be formed at the interface. The device properties can be effectively tailored by changing the material combinations of the composite film, such as metal in oxide, alloy in oxide, and metal in nitride configuration, as shown in Figure . − Also note that this technique usually resorts to high-temperature vacuum deposition through molecular beam epitaxy or pulsed laser deposition. − Thus, the deposition of this type of composite multifunction film on different semiconducting absorbers (Si, GaAs and InP, etc.) at high temperature is very challenging, because of the mismatch of lattice at the interface and complexity of the interface control under high temperature.…”

Ultrathin Ternary FeCoNi Alloy Nanoarrays in BaTiO3 Matrix for Room-Temperature Multiferroic and Hyperbolic Metamaterial

“…V ertically aligned nanocomposite (VAN) thin films have garnered substantial attention owing to their multifunctionality and strong vertical interfacial coupling, which enable them to exhibit physical properties that are distinct from those found in single-phase materials. 1−4 An illustrative example is the realization of diverse multiferroic thin films through the VAN system design (e.g., combining ferroelectric BaTiO 3 with magnetic CoFe 2 O 4 or SrRuO 3 ), 5,6 a property rarely achievable in single-phase materials. 7 Furthermore, in recent years, the selection of materials for VAN thin films has expanded beyond oxides to encompass metals and nitrides, which significantly enhances the design flexibility of VANs, enabling the attainment of extraordinary physical properties that were previously unachievable within oxide−oxide systems.…”