Volume 79, Number 2, July 2007
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||03 July 2007|
Current-processinginduced anisotropic conduction in manganite films
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences - Beijing 100080, PRC
Corresponding author: firstname.lastname@example.org
Accepted: 7 June 2007
Current-processinginduced anisotropic conduction (CIAC) has been observed recently in LaCaxMnO3 (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 LaCaxMnO3 (x = 0.2, 0.33), La0.67Sr0.33MnO3, Pr0.7Ca0.3MnO3, La0.35Pr0.32Ca0.33MnO3 and La0.7Ce0.3MnO3 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
© Europhysics Letters Association, 2007
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