Charge screening-controlled Verwey phase transition in Fe3O4/SrTiO3 heterostructure. (21st February 2018)

• Record Type: Journal Article
• Authors: Ji, H; Wang, Y G; Li, Y
• Is Part Of: Journal of physics. Volume 30:Number 11(2018)
• Publication Date: 2018-02-21
• Subjects: magnetoelectric effect -- multiferroic heterostructure -- charge screening -- electric modulation of magnetization -- Verwey phase transition; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aaae37
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Despite intensive investigations into the Verwey phase transition of Fe3 O4 over half a century, the mechanism of this phase transition remains controversial and needs further research. In this work, we build the Fe3 O4 /SrTiO3 multiferroic heterostructure and investigate the temperature dependence of its saturation magnetization under various electric fields. It is found that the charge-screening effect not only influences the magnetization but also induces the temperature of the Verwey phase transition shifting ~13 K. It suggests that the Verwey phase transition has certain correlations with the electron distribution and the change of the number of minority spin electrons in the trimerons plays a dominant role in the temperature shift of the phase transition.