Origins of both insulator–metal transition and colossal magnetoresistance in doped manganese perovskites
Yuan, S. L. ; Zhao, W. Y. ; Zhang, G. Q. ; Tu, F. ; Peng, G. ; Liu, J. ; Yang, Y. P. ; Li, G. ; Jiang, Y. ; Zeng, X. Y. ; Tang, C. Q.
Woodbury, NY : American Institute of Physics (AIP)
Published 2000
Woodbury, NY : American Institute of Physics (AIP)
Published 2000
| ISSN: |
1077-3118
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| Source: |
AIP Digital Archive
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| Topics: |
Physics
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| Notes: |
Based on experiments of both transport and paramagnetic resonance for (La1−xYx)2/3Ca1/3MnO3, the ground state above Tc and possible origins of both insulator–metal transition and colossal magnetoresistance near Tc are discussed. Modeling the system as a network of junctions, each consisting of a paramagnetic region sandwiched between two ferromagnetic domains, a phenomenological expression is proposed for resistance as a function of temperature and magnetic field. We show that the observed transport and magnetotransport phenomena can be quantitatively explained by the present model for the whole temperature range studied. © 2000 American Institute of Physics.
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| Type of Medium: |
Electronic Resource
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| URL: |