摘要
The structural,vibrational,and magnetic properties of well prepared Bi 1 x Y x FeO 3(x=0-0.1) powders are investigated by combining the X-ray diffraction,Raman scattering,differential scanning calorimetry,and magnetometry measurements.A structural symmetric breaking from the rhombohedral R3c to orthorhombic Pnma between x=0.07 and 0.1 is identified from the X-ray and Raman measurements,accompanying a ferroelectric-antiferroelectric phase transition.The remnant magnetization of Bi 0.9 Y 0.1 FeO 3 is about 15 times higher in magnitude compared to the pure BiFeO 3.Such a giant enhancement is suggested to result from the destruction of the spin cycloid accompanied with the structured transition.
The structural, vibrational, and magnetic properties of well prepared Bi1-xYxFeO3 （x=0-0.1） powders are investigated by com- bining the X-ray diffraction, Raman scattering, differential scanning calorimetry, and magnetometry measurements. A struc- tural symmetric breaking from the rhombohedral R3c to orthorhombic Pnma between x=0.07 and 0.1 is identified from the X-ray and Raman measurements, accompanying a ferroelectric-antiferroelectric phase transition. The remnant magnetization of Bi0.9Y0.1FeO3 is about 15 times higher in magnitude compared to the pure BiFeO3. Such a giant enhancement is suggested to result from the destruction of the spin cycloid accompanied with the structured transition.
基金
supported by the Cultivation Fund of the Key Scientific and Technical Innovation Project,Ministry of Education of China (Grant No.708070)
the National Natural Science Foundation of China (GrantNos. 10874046 and 11104081)
