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Magnetic and Electrical Properties of (Mn, La)‐Codoped SrTiO 3 Thin Films
Author(s) -
Zhang SongYin,
Lin YuanHua,
Nan CeWen,
Zhao Rongjuan,
He Jinliang
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2008.02602.x
Subject(s) - materials science , thin film , amorphous solid , ferromagnetism , strontium titanate , substrate (aquarium) , transmission electron microscopy , magnetic semiconductor , condensed matter physics , doping , optoelectronics , nanotechnology , crystallography , chemistry , physics , oceanography , geology
Mn‐doped SrTiO 3 ‐based thin films have been prepared by a simple sol–gel spin‐coating method on silicon substrate. X‐ray diffraction and high‐resolution transmission electron microscopy reveal that these thin films are composed of amorphous and crystalline SrTiO 3 phases. Optical and electrical measurements indicate that La codoping can make the band gap of SrTiO 3 narrow and cause the leakage current to increase. Ferromagnetic behavior can be observed in these Mn‐ and/or La‐codoped SrTiO 3 ‐based thin films at room temperature, which should be ascribed to the magnetic coupling between the induced free electrons and Mn 3 d spins.