期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 4, 期 37, 页码 8704-8710出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6tc02715f
关键词
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资金
- NSFC [21290173, 21301198, 91422302]
- NSF of Guangdong [S2013010012186, S2012030006240]
- BAGUI scholar program [2014A001]
- Project of Talents Highland of the Guangxi Province of China
A novel two-dimensional Heisenberg ferromagnet with a flexible organic layer, [C6H5(CH2)(4)NH3](2)[CuCl4], undergoes ferroelastic, ferroelectric and ferromagnetic transitions at 337, 143 and 7.8 K, respectively. The ferromagnet was characterized by variable-temperature thermal measurements, in situ single-crystal X-ray structure analyses, anisotropic dielectric measurements, and pyroelectric and magnetic analyses. Differing from the other layered perovskite-like compounds, this compound revealed an extraordinary distorted polar structure with five times the cell volume at its polar phase because of the flexibility of the organic layer. Hence, this presents an approach to introduce spontaneous electric polarization into the Heisenberg ferromagnet for single-phase multiferroics. Moreover, due to the cooperation between the frozen [C6H5(CH2)(4)NH3](+) cations and the tilting of the CuCl6 octahedra, this potential multiferroic compound simultaneously exhibits dielectric and magnetic bistabilities during both the ferroelastic and ferroelectric transitions.
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