Media type: E-Article Title: Ferroelectricity in perovskiteHoMnO3andYMnO3 Contributor: Lorenz, Bernd; Wang, Ya-Qi; Chu, Ching-Wu Published: American Physical Society (APS), 2007 Published in: Physical Review B, 76 (2007) 10 Language: English DOI: 10.1103/physrevb.76.104405 ISSN: 1098-0121; 1550-235X Origination: Footnote: