【摘 要】
：
Single-phase multiferroic materials are usually considered useless because of the weak magnetoelectric effects,low operating temperature,and small electric pola
【机 构】
：
Beijing National Laboratory for Condensed Matter Physics and Beijing Advanced Innovation Center for
【出 处】
：
中国科学：物理学 力学 天文学（英文版）
论文部分内容阅读
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 BaSrCo2Fe11AlO22 and Ba0.gSr1.1Co2Fe11AlO22 is able to cause a huge change in the linear magnetoelectric coefficient (αE =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.
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