Multiferroic behavior observed in highly orientated Mn-doped BaTiO3 thin films

Abstract

Highly orientated Mn-doped BaTiO3 thin films have been prepared on Nb-doped SrTiO3 substrate by pulsed laser deposition. Structural and electrical studies indicate that pure and Mn-doped BaTiO3 thin films show single phase character and good ferroelectric performance. All of the Mn-doped BaTiO3 thin films show obvious room-temperature ferromagnetism and the magnetization increases with the growing concentration of doped Mn. A bound magnetic polaron model was proposed to understand the observed ferromagnetic behavior of resistive Mn-doped BaTiO3 thin films. Our results demonstrate that ferromagnetism can be induced in the ferroelectric BaTiO3 film, which makes it a promising single-phase multiferroic.

Structural incommensurate modulation rule in hexagonal Ba(Ti1-xMx)O3-δ (M = Mn, Fe) multiferroics

“…[2][3][4] However, the coupling interaction between FM and FE was not observed in this doped system. Comparatively, combined FM and FE were also observed at room temperature in Fe-doped hexagonal BaTiO 3 , 9, 10 and crosscontrolled magnetoelectric effects were realized because of the oxygen-vacancy ordering at O1 site.…”

Structure, electrical and magnetic property investigations on dense Fe-doped hexagonal BaTiO3

“…1 Triggered by integrating multiple functionalities in one material, alternation of physical properties through compositional modification has been widely carried out in perovskite BaTiO 3 and coexistence of ferromagnetism (FM) and ferroelectricity at room temperature were reported. [2][3][4] As another polymorph of BaTiO 3 , hexagonal (6H) BaTiO 3 has increasingly attracted the attention recently because of its unusual high-temperature FM caused by magnetic Fe ion doping of B-site Ti, 5,6 especially when the doping concentration is less than 10 mol%. 7,8 Subsequently, the origin of the FM in the dilute magnetic oxide becomes controversial owing to the possible dopant clustering and precipitation of secondary magnetic phase responsible for the possible extrinsic signals.…”

Controllable Growth of Ni Nanocrystals Embedded in BaTiO<sub>3</sub>/SrTiO<sub>3</sub> Superlattices

“…Such composite films offer the combination of ferroelectric and ferromagnetic characteristics. This magnetoelectric interaction will be particularly strong in systems which simultaneously exhibit both ferromagnetism and ferroelectricity, i.e., in magnetoelectric multiferroics [16][17][18].…”