Journal
JOURNAL OF APPLIED PHYSICS
Volume 111, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3693531
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- Cultivation Fund of the Key Scientific and Technical Innovation Project
- Ministry of Education of China [708070]
- National Natural Science Foundation of China [10874046, 1104081]
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The structural and magnetic properties of well-prepared Bi1-xNdxFeO3 (0 <= x <= 0.2) powders are investigated by combining x-ray diffraction, Raman scattering spectra, and magnetic measurements. Structural symmetric breaking from rhombohedral R3c to orthorhombic Pnma at the substituted Nd concentration of x = 0.125-0.15, accompanying a ferroelectric-antiferroelectric phase transition, is identified from x-ray diffraction patterns and Raman scattering spectra. The magnetization enhancement of Bi1-xNdxFeO3 is observed before approaching ferroelectric-antiferroelectric phase boundary conditions (0 <= x <= 0.15). We consider that such enhancement results from the destruction of the spin cycloid accompanying the structural transition. At x > 0.15, the magnetization decreases, which is probably attributable to further degradation of the space modulated spin structure, allowing a more perfect antiferromagnetic ordering. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3693531]
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