Reversible alternation between bipolar and unipolar resistive switching in La-SrTiO3 thin films

doi:10.1088/1674-1056/22/11/117314

Abstract The alternation from bipolar to unipolar resistive switching is observed in perovskite La_0.01Sr_0.99TiO₃ thin films. These two switching modes can be activated separately depending on the compliance current (I_comp) during the electroforming process: with a higher I_comp (5 mA) the unipolar resistance switching behavior is measured, while the bipolar resistance switching behavior is observed with a lower I_comp (1 mA). On the basis of I–V characteristics, the switching mechanisms for the URS and BRS modes are considered as being a change in the Schottky-like barrier height and/or width at the Pt/La-SrTiO₃ interface and the formation and disruption of conduction filaments, respectively.

Keywords: unipolar and bipolar resistive switching La-doped SrTiO₃ thin film

Received: 04 March 2013
Revised: 09 April 2013
Accepted manuscript online:

PACS:	73.61.Ng	(Insulators)
	72.80.Ga	(Transition-metal compounds)

Fund: Project supported by the Key Projects of the National Natural Science Foundation of China (Grant No. 11032010), the National Natural Science Foundation of China (Grant Nos. 51072171, 61274107, 61176093, and 11275163), the Program for Changjiang Scholars and Innovative Research Team in University, China (Grant No. IRT1080), the National Basic Rearch Program of China (Grant No. 2012CB326404), the Key Projects of Scientific Research Fund of Hunan Provincial Education Department, China (Grant No. 12A129), the Doctoral Program of Higher Education of China (Grant No. 20104301110001), and the Aid Program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province, China.

Corresponding Authors: Tang Ming-Hua
E-mail: mhtang@xtu.edu.cn

Cite this article:

Xu Ding-Lin (许定林), Xiong Ying (熊颖), Tang Ming-Hua (唐明华), Zeng Bai-Wen (曾柏文), Xiao Yong-Guang (肖永光), Wang Zi-Ping (王子平) Reversible alternation between bipolar and unipolar resistive switching in La-SrTiO₃ thin films 2013 Chin. Phys. B 22 117314

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Reversible alternation between bipolar and unipolar resistive switching in La-SrTiO3 thin films

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Reversible alternation between bipolar and unipolar resistive switching in La-SrTiO₃ thin films