Microstructures and magnetic properties of high pressure synthetized multiferroic CuFeO2

Abstract

CuFeO2 multiferroics were fabricated under high pressure and high temperature for the first time, and their microstructures and magnetic properties were investigated systematically. Compared with the conventional state-solid reaction method, high pressure was conducive to obtaining CuFeO2 ceramics with preferred orientation and dense morphology. Phase-pure CuFeO2 was obtainable with Cu2O and Fe2O3 as starting materials. Though all samples exhibited two successive magnetic transitions at low temperatures, the magnetic transition temperatures in high-pressure synthesized sample decreased compared to the sample as prepared under ambient pressure.

Keywords

• Multiferroics
• High pressure
• Microstructure
• Magnetic properties