Room-temperature giant magnetotranstance effect in single-phase multiferroics

作者：Yan-Fen Chang,Young Sun

摘要：Single-phase multiferroic materials are usually considered useless because of the weak magnetoelectric effects,low operating temperature,and small electric polarization induced by magnetic orders.As a result,current studies on applications of the magnetoelectric effects are mainly focusing on multiferroic heterostructures and composites.Here we report a room-temperature giant effect in response to external magnetic fields in single-phase multiferroics.A low magnetic field of 1000 Oe applied on the spin-driven multiferroic hexaferrites BaSrCo_(2) Fe_(11)AlO_(22) and Ba_(0.9)Sr_(1.1)Co_(2) Fe_(11)AlO_(22)is able to cause a huge change in the linear magnetoelectric coefficient(α_(E)=dE/dH) by several orders,leading to a giant magnetotranstance(GMT) effect at room temperature.The GMT effect is comparable to the well-known giant magnetoresistance(GMR) effect in magnetic multilayers,and thus opens up a door toward practical applications for single-phase multiferroics.

发文机构：Beijing National Laboratory for Condensed Matter Physics and Beijing Advanced Innovation Center for Materials Genome Engineering School of Physical Science Center of Quantum Materials and Devices

关键词：MULTIFERROICmagnetoelectriceffecttranstor

分类号： O48[理学—固体物理]