Complementary Charge Trapping and Ionic Migration in Resistive Switching of Rare-Earth Manganite TbMnO3
详细信息 查看全文
- 作者：Yimin Cui ; Haiyang Peng ; Shuxiang Wu ; Rongming Wang ; Tom Wu
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2013
- 出版时间：February 27, 2013
- 年：2013
- 卷：5
- 期：4
- 页码：1213-1217
- 全文大小：353K
- 年卷期：v.5,no.4(February 27, 2013)
- ISSN：1944-8252
文摘
Perovskite rare-earth manganites like TbMnO3 exhibit rich magnetic and electric phases, providing opportunities for next-generation multifunctional devices. Here, we report the nonvolatile bipolar switching of resistance and capacitance in TbMnO3 thin films grown on conducting Nb:SrTiO3 substrates. The device shows an ON/OFF resistance ratio of 1 脳 104, and the resistive switching is accompanied by a frequency-dependent capacitance switching. Detailed analysis of the conduction mechanisms reveals that the migration of oxygen vacancies and the charge trapping/detrapping at the heterojunction interface play important and complementary roles in the switching behaviors. Our results suggest that both electronic and ionic processes should be considered in order to elucidate the conduction mechanisms and the switching behaviors in such heterostructures made of complex oxides.