Pressure Effect on Ferroelectric Properties of GdMn2O5 and TmMn2O5

Narayan Poudel, Melissa Gooch, Bernd Lorenz, Ching Wu Chu, Jaewook Kim, Sang Wook Cheong

研究成果: Article同行評審

3 引文 斯高帕斯(Scopus)

摘要

The pressure effect on the ferroelectric (FE) properties of the multiferroic compounds GdMn2O5 and TmMn2O5 was studied up to 18.2 kbars. A new FE phase was observed at a higher temperature in GdMn2O5 above a critical pressure, Pc ≈ 10 kbars. Our results indicate that pressure decouples the Gd moment from Mn spin system and splits the FE phase. Thermal expansion measurements reveal a large increase of the c-axis at the ambient-pressure FE transition. The pressure-induced contraction of the c lattice parameter is considered to be the origin of the decoupling of both spin systems above Pc. From the dielectric and FE properties of GdMn2O5, a pressureerature phase diagram can be derived. While a new phase was discovered for GdMn2O5, no significant change in polarization was observed for TmMn2O5 up to 16.6 kbars.

原文English
文章編號7404007
期刊IEEE Transactions on Magnetics
52
發行號7
DOIs
出版狀態Published - 2016 七月

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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