Current-processinginduced anisotropic conduction in manganite films

Y. W. Xie; J. R. Sun; D. J. Wang; S. Liang; Y. Z. Chen; W. M. Lü; B. G. Shen

doi:10.1209/0295-5075/79/27005

All issues

Volume 79 / No 2 (July 2007)

EPL, 79 2 (2007) 27005

Abstract

Issue		EPL Volume 79, Number 2, July 2007


Article Number		27005
Number of page(s)		4
Section		Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI		https://doi.org/10.1209/0295-5075/79/27005
Published online		03 July 2007

EPL, 79 (2007) 27005

Current-processing $\hbox{--}$ induced anisotropic conduction in manganite films

Y. W. Xie, J. R. Sun, D. J. Wang, S. Liang, Y. Z. Chen, W. M. Lü and B. G. Shen

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences - Beijing 100080, PRC

Corresponding author: jrsun@g203.iphy.ac.cn

Received: 11 March 2007
Accepted: 7 June 2007

Abstract

Current-processing $\hbox{--}$ induced anisotropic conduction (CIAC) has been observed recently in La $_{1-x}$ Ca_xMnO₃ (x = 0.2, 0.33) films. Here we report a more applicable and simple method, applying processing current at room temperature, to produce such anisotropic conduction. Using this method, we have examined La $_{1-x}$ Ca_xMnO₃ (x = 0.2, 0.33), La_0.67Sr_0.33MnO₃, Pr_0.7Ca_0.3MnO₃, La_0.35Pr_0.32Ca_0.33MnO₃ and La_0.7Ce_0.3MnO₃ films grown on SrTiO₃ substrates, and found CIAC in all these films, showing CIAC is a fairly universal phenomenon for manganites. The method exhibits good ability to process samples of large resistance/size. We even got remarkable anisotropic conduction in a manganite film as long as 3 mm. Our effort provides a very simple method to prepare such samples, which will help to further researches in this field.

PACS: 75.47.Lx – Manganites / 75.47.Gk – Colossal magnetoresistance / 73.40.Ei – Rectification

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