Abstract
MnWO4 has attracted attention because of its ferroelectric property induced by frustrated helical spin order. Strong spin-lattice interaction is necessary to explain ferroelectricity associated with this type of magnetic order. We have conducted thermal expansion measurements along the a, b, c axes revealing the existence of strong anisotropic lattice anomalies at T1 = 7.8 K, the temperature of the magnetic lock-in transition into a commensurate low-temperature (reentrant paraelectric) phase. The effect of hydrostatic pressure up to 1.8 GPa on the FE phase is investigated by measuring the dielectric constant and the FE polarization. The low-temperature commensurate and paraelectric phase is stabilized and the stability range of the ferroelectric phase is diminished under pressure.
Original language | English |
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Pages (from-to) | 1428-1430 |
Number of pages | 3 |
Journal | Physica B: Physics of Condensed Matter |
Volume | 403 |
Issue number | 5-9 |
DOIs | |
State | Published - Apr 1 2008 |
Externally published | Yes |
Keywords
- MnWO
- Multiferroics
- Pressure effect
- Thermal expansion