Experimental evidence of a cluster-glass transition on the colossal magnetoresistance manganite La0.7Pb0.3(Mn0.9Fe0.1)O3
Veglio, N.; Bermejo, Francisco Javier; Gutierrez, J.; Barandiarán, J.M.; Peña, Aránzazu; González, M.A.; Romano, P.P.; +1 Authors
Veglio, N.; Bermejo, Francisco Javier; Gutierrez, J.; Barandiarán, J.M.; Peña, Aránzazu; González, M.A.; Romano, P.P.; Mondelli, C.;
Experimental evidence of a cluster-glass transition on the colossal magnetoresistance manganite La0.7Pb0.3(Mn0.9Fe0.1)O3
Neutron small angle scattering on a colossal magnetoresistance material shows clear signatures of a rise in characteristic length of paramagnetic fluctuations as the maximum of dc susceptibility is approached from high temperatures. The phenomenon is accompanied by a rise in intensity of a broad peak that appears at wave vectors of ≈ 0.025-1, and this is interpreted as a fingerprint of the onset of ferromagnetic ordering due to intercluster magnetic interactions. © 2005 The American Physical Society.
4 págs.; 3 figs. ; PACS numberssd: 75.40.2s, 75.47.2m, 61.12.Ex, 61.46.1w
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