Colossal Magnetoresistance is a Griffiths Singularity

Details Colossal Magnetoresistance is a Griffiths Singularity Colossal Magnetoresistance is a Griffiths Singularity

2002-01-22

arxiv.org/abs/cond-mat/0201381v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages

Scientific paper

10.1103/PhysRevLett.88.197203

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 La$_{0.7}$Ca$_{0.3}$MnO$_{3}.$

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