Room-temperature giant magnetotranstance effect in single-phase multiferroics


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 Ba0.9Sr1.1Co2Fe11AlO22 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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Corresponding author

Correspondence to Young Sun.

Additional information

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51725104, and 11534015), the National Key Research and Development Program of China (Grant No. 2016YFA0300700), and the Beijing Natural Science Foundation (Grant No. Z180009).

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Chang, YF., Sun, Y. Room-temperature giant magnetotranstance effect in single-phase multiferroics. Sci. China Phys. Mech. Astron. 64, 237511 (2021).

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  • multiferroic
  • magnetoelectric effect
  • transtor