Structure, magnetic and transport properties of La1−xBixMnO3

We have investigated the structural, magnetic and transport properties of La1−xBixMnO3 samples. As the Bi content increases, a structural transition from rhombohedral to pseudocubic and a magnetic phase transition from ferromagnetic ordering to cluster glass are identified. Metal–insulator (MI) tran...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2004-09, Vol.280 (2-3), p.404-411
Main Authors: Zhao, Y.D., Park, Jonghyurk, Jung, R.-J., Noh, H.-J., Oh, S.-J.
Format: Article
Language:English
Subjects:
Colossal magnetoresistance
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties and materials
Magnetotransport phenomena, materials for magnetotransport
Manganites
Metal–insulator transitions
Physics
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Summary:We have investigated the structural, magnetic and transport properties of La1−xBixMnO3 samples. As the Bi content increases, a structural transition from rhombohedral to pseudocubic and a magnetic phase transition from ferromagnetic ordering to cluster glass are identified. Metal–insulator (MI) transitions and large magnetoresistance (MR) effects are observed at low Bi doping levels, while insulating behavior of resistivity is found in the whole measured temperature range at high-doping levels. Two distinct ferromagnetic insulating (FI) states are found at low temperatures in this system. One can be suppressed and the other can be enhanced by applying magnetic fields. Possible reasons for the observed structural, magnetic phase transitions and changes of resistivity behavior with Bi doping are discussed.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2004.06.024