期刊
PHYSICAL REVIEW B
卷 79, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.224415
关键词
cobalt compounds; dielectric polarisation; doping profiles; ferroelectric transitions; magnetic structure; magnetic transitions; manganese compounds; multiferroics
资金
- Korean government (MEST) [20090059529]
- Nuclear RD Programs [M20701050003-08N0105-00311]
- BAERI Program
We have studied the effect of Co doping on the magnetic properties of multiferroic Mn1-xCoxWO4 using vibrating sample magnetometry and neutron powder diffraction. We find that Co doping at x greater than or similar to 0.05 suppresses the commensurate AF1 phase and stabilizes the incommensurate spiral AF2 phase down to the lowest temperature. As the Co doping concentration increases further, a spin-flop transition occurs with the spiral-basal plane tilting off the b axis. Such magnetic structure expects a ferroelectric polarization component along the a axis. The resulting phase diagram is richer than the case of Fe doping.
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