Room‐Temperature Ferroelectricity in Hexagonal TbMnO3 Thin Films

• DOI: 10.1002/adma.201403301
• Publication Date: 2014-10-18T10:58:05Z
• Authors: Dong Jik Kim; Tula R. Paudel; Haidong Lu; John D. Burton; John G. Connell; Evgeny Y. Tsymbal; S. S. Ambrose Seo; Alexei Gruverman
• Keywords: Piezoresponse force microscopy; Orthorhombic crystal system

Piezoresponse force microscopy imaging in conjunction with first-principles calculations provide strong evidence for room-temperature ferroelectricity epitaxially stabilized hexagonal TbMnO3 thin films, which the bulk form are orthorhombic structure. The obtained results demonstrate that new phases and functional properties of complex oxide materials can be strain-engineered using epitaxial growth.