Mutual Ferromagnetic–Ferroelectric Coupling in Multiferroic Copper-Doped ZnO (pages 1635–1640)
Tun Seng Herng, Meng Fei Wong, Dongchen Qi, Jiabao Yi, Amit Kumar, Alicia Huang, Fransiska Cecilia Kartawidjaja, Serban Smadici, Peter Abbamonte, Cecilia Sánchez-Hanke, Santiranjan Shannigrahi, Jun Min Xue, John Wang, Yuan Ping Feng, Andrivo Rusydi, Kaiyang Zeng and Jun Ding
Article first published online: 15 FEB 2011 | DOI: 10.1002/adma.201004519
A mutual ferromagnetic and ferroelectric coupling (multiferroic behavior) in Cu-doped ZnO is demonstrated via deterministic control of Cu doping and defect engineering. The coexistence of multivalence Cu ions and oxygen vacancies is important to multiferroic behaviors in ZnO:Cu. The samples show clear ferroelectric and ferromagnetic domain patterns. These domain structures may be written reversibly via electric and magnetic bias.