Colossal magnetoresistance is a Griffiths singularity |
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Authors: | Salamon M B Lin P Chun S H |
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Affiliation: | Department of Physics, University of Illinois, 1110 West Green Street, Urbana, Illinois 61801-3080, USA. |
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Abstract: | It is now widely accepted that the magnetic transition in doped manganites that show large magnetoresistance is a type of percolation effect. This paper demonstrates that the transition should be viewed in the context of the Griffiths phase that arises when disorder suppresses a magnetic transition. This approach explains unusual aspects of susceptibility and heat capacity data from a single crystal of La0.7Ca0.3MnO3. |
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