Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-10-05
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.85.3285
We report new zero-field muon spin relaxation and neutron spin echo measurements in ferromagnetic (FM) (La,Ca)MnO3 which taken together suggest two spatially separated regions in close proximity possessing very different Mn-ion spin dynamics. One region corresponds to an extended cluster which displays 'critical slowing down' near Tc and an increasing volume fraction below Tc. The second region possesses more slowly fluctuating spins and a decreasing volume fraction below Tc. These data are discussed in terms of the growth of small polarons into overlapping regions of correlated spins below Tc, resulting in a microscopically inhomogeneous FM transition.
Cheong Sang-Wook
Ehlers Georg
Gardner Starkie J.
Heffner Robert H.
MacLaughlin D. E.
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