Current-induced change in the character of the conduction in La0.775Sr0.225MnO3−δ films

Autor:	I. V. Lezhnenko, Alexandr Tovstolytkin, A. N. Pogorily, V. P. Kravchik, A. I. Matviyenko
Rok vydání:	2003
Předmět:	Colossal magnetoresistance Materials science Physics and Astronomy (miscellaneous) Condensed matter physics General Physics and Astronomy Sputter deposition Thermal conduction Metal Character (mathematics) visual_art visual_art.visual_art_medium Current (fluid) Thin film Current density
Zdroj:	Low Temperature Physics. 29:563-565
ISSN:	1090-6517 1063-777X
DOI:	10.1063/1.1596580
Popis:	A study is made of the electrical properties of thin films of La0.775Sr0.225MnO3−δ prepared on single-crystal substrates of SrTiO3 by magnetron sputtering. A substantially nonlinear character of the current–voltage characteristic of the film samples is observed at temperatures below 270 K. It is shown that increasing the current density leads to a transition from a semiconducting to a metallic character of the conduction. An explanation of the results is proposed, based on the hypothesis of phase separation of the samples into conducting and insulating layers, stimulated by the mechanical stresses arising near the film–substrate boundary.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::077081c01f5aa927042605743653d70a https://doi.org/10.1063/1.1596580 Zobrazit plný text záznamu