Reversible magnetism transition at ferroelectric oxide heterointerface

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2020,（24）
• 所属期刊栏目: ARTICLES
• 页码范围: 2094-2099
• 页数: 6页
• 语种: 英文

摘要

Oxide heterointerface is a platform to create unprecedented two-dimensional electron gas,superconduc-tivity and ferromagnetism,arising from a polar discontinuity at the interface.In particular,the ability to tune these intriguing effects paves a way to elucidate their fundamental physics and to develop novel electronic/magnetic devices.In this work,we report for the first time that a ferroelectric polarization screening at SrTiO3/PbTiO3 interface is able to drive an electronic construction of Ti atom,giving rise to room-temperature ferromagnetism.Surprisingly,such ferromagnetism can be switched to antiferro-magnetism by applying a magnetic field,which is reversible.A coupling of itinerant electrons with local moments at interfacial Ti 3d orbital was proposed to explain the magnetism.The localization of the itin-erant electrons under a magnetic field is responsible for the suppression of magnetism.These findings provide new insights into interfacial magnetism and their control by magnetic field relevant interfacial electrons promising for device applications.