Colossal magnetoresistance is a Griffiths singularity.
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.
Salamon
M B
MB
Department of Physics, University of Illinois, 1110 West Green Street, Urbana, Illinois 61801-3080, USA.
Lin
P
P
Chun
S H
SH