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: 0103 physical sciences; 02 engineering and technology; 0210 nano-technology; 01 natural sciences

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