Room temperature ferromagnetism and ferroelectricity in double perovskite Y2NiMnO6 thin film

• Published in: Journal of magnetism and magnetic materials Vol. 512; p. 167062
• Main Authors: Alam, Mahebub, Mandal, Kalyan
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15-10-2020; Elsevier BV
• Subjects: Argon; Double Perovskite; Electric polarization; Ferroelectricity; Ferromagnetic materials; Magnetism; Magnetoelectric coefficient; Multiferroic; Perovskites; Pulsed laser deposition; Pulsed lasers; Room temperature; Surface roughness; Thin films; Unsaturated surface spins; Unsaturated surface spins; Magnetoelectric coefficient; Double Perovskite; Multiferroic
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2020.167062

[Display omitted]
•The Y2NiMnO6 films are found to exhibit unexpected room temperature ferromagnetism and spontaneous ferroelectricity.•It is found that the size of the nanostructures and the surface roughness of the YNMO thin films define and control their inherent ferromagnetic and ferroelectric properties.•Studies on the magnetic and ferroelectric properties of YNMO thin films indicate that the uncompensated surface spins and the surface charges associated with the large surface areas of the films are responsible for the room temperature ferromagnetism and ferroelectricity.
In this work, we synthesized epitaxial Y2NiMnO6 thin film by Pulsed Laser Deposition technique in two different atmospheres (oxygen and argon) and studied their magnetic as well as electric polarization. Room temperature ferromagnetism and ferroelectricity are exhibited by these Y2NiMnO6 thin films, indicating the coexistence of more than one ferroic interaction in this system. Here the surface roughness increases the total surface area and hence the unsaturated surface spins of the films which control both the ferromagnetic as well as ferroelectric order.