期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 25, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.257205
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资金
- State of Florida
- DOE [DE-FG02-98ER45707]
- Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
- [NSF-DMR-0654118]
We report the magnetic and electric properties of Ba3NiNb2O9, which is a quasi-two-dimensional spin-one triangular-lattice antiferromagnet with trigonal structure. At low T and with increasing magnetic field, the system evolves from a 120 degree magnetic ordering phase (A phase) to an up-up-down (uud) phase (B phase) with a change of slope at 1/3 of the saturation magnetization, and then to an oblique phase (C phase). Accordingly, the ferroelectricity switches on at each phase boundary with appearance of spontaneous polarization. Therefore, Ba3NiNb2O9 is a unique triangular-lattice antiferromagnet exhibiting both uud phase and multiferroicity. DOI: 10.1103/PhysRevLett.109.257205
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