Open AccessTransport and rectification properties of Pr0.5Ca0.5MnO3/Si heterojunction
Author(s) -
Wan Ji-Yu,
Jin Kusaka,
Tan Xing-Yi,
Changle Chen
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.8137
Subject(s) - heterojunction , rectification , magnetoresistance , materials science , pulsed laser deposition , substrate (aquarium) , atmospheric temperature range , thin film , silicon , magnetic field , condensed matter physics , optoelectronics , voltage , nanotechnology , electrical engineering , physics , oceanography , quantum mechanics , geology , meteorology , engineering
Pr0.5Ca0.5MnO3(PCMO) is been prepared by a solid-state reaction technique, and the thin film of PCMO is deposited on an n-type silicon substrate by a pulsed laser deposition method. Experimental results indicate the transport character of the film may be consistent with the variable range hopping model in a temperature range of 80—300 K, but it changes from one-dimension to two-dimensional and then turns three-dimensional with temperature increasing. It may be attributed to the effect of orbit order on the transport characteristics. The PCMO/Si heterojunction possesses good rectifieation property under a magnetic field,and at a positive voltage the heterojunction shows its magnetoresistance to have a remarkable transition from positive to negative.