Thermal expansion and pressure effect in MnWO4

R. P. Chaudhury; F. Yen; C. R. dela Cruz; B. Lorenz; Y. Q. Wang; Y. Y. Sun; C. W. Chu

doi:10.1016/j.physb.2007.10.327

Thermal expansion and pressure effect in MnWO4

Materials Science 2009-11-13 v1

Authors: R. P. Chaudhury , F. Yen , C. R. dela Cruz , B. Lorenz , Y. Q. Wang , Y. Y. Sun , C. W. Chu

Comments: 2 pages, 3 figures. SCES conference proceedings, houston, TX, 2007. to be published in Physica B

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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.

Keywords

magnetic materials and spin systems magnetization magnetic structure

Cite

@article{arxiv.0705.4675,
  title  = {Thermal expansion and pressure effect in MnWO4},
  author = {R. P. Chaudhury and F. Yen and C. R. dela Cruz and B. Lorenz and Y. Q. Wang and Y. Y. Sun and C. W. Chu},
  journal= {arXiv preprint arXiv:0705.4675},
  year   = {2009}
}

Thermal expansion and pressure effect in MnWO4

Abstract

Keywords

Cite

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