Interfacial layer assisted, forming free, and reliable bipolar resistive switching in solution processed BiFeO3 thin films

被引:30
|
作者
Kumari, Chandni [1 ,2 ]
Varun, Ishan [3 ]
Tiwari, Shree Prakash [3 ]
Dixit, Ambesh [1 ,4 ]
机构
[1] Indian Inst Technol Jodhpur, Dept Phys, Jodhpur 342037, Rajasthan, India
[2] Graph Era Deemed Be Univ Dehradun, Dept Elect & Commun Engn, Dehra Dun 248002, Uttarakhand, India
[3] Indian Inst Technol Jodhpur, Dept Elect Engn, Jodhpur 342037, Rajasthan, India
[4] Indian Inst Technol Jodhpur, Ctr Solar Energy, Jodhpur 342037, Rajasthan, India
关键词
MEMRISTIVE DEVICES; MEMORY;
D O I
10.1063/1.5134972
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
BiFeO3 based resistive random access memory (RRAM) devices are fabricated using a low-cost solution process to study the effect of an Al top electrode on switching behavior and reliability. Fabricated devices demonstrated bipolar switching characteristics with a moderate I-on/I-off ratio, set and reset voltages of similar to-1.3 V and similar to 0.8 V, DC and AC endurance of more than 250 cycles and 7100 cycles, respectively, and a retention time of over 10(4) s, confirming the non-volatile resistive switching behavior. The ohmic and trap filled space charge limited conduction dominates the conduction mechanism in the devices at lower and higher voltages, respectively. Moreover, impedance spectroscopy measurements substantiate the presence of an AlOx layer at the Al/BiFeO3 interface resulting from the Al-O interaction at the junction, which is the possible rationale of reliable complementary switching in these RRAM devices. The switching mechanism is elucidated using the formation and rupture of the oxygen vacancy mediated filament, assisted by the participation of a thin AlOx layer at the Al/BFO interface. The role of the thin AlOx layer is explained by modeling of impedances.
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页数:7
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