Evolution of the low-frequency spin dynamics in ferromagnetic manganites

J. A. Fernandez-Baca, P. Dai, H. Y. Hwang, C. Kloc, S. W. Cheong

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157 Scopus citations

Abstract

Neutron scattering was used to study the ferromagnetic manganites Nd0.7Sr0.3MnO3 (TC = 197.9K) and Pr0.63Sr0.37MnO3 (TC = 300.9K). The spin dynamical behavior of these two systems is similar at low temperatures but drastically different at temperatures around TC. While the formation of spin clusters of size (∼20Å) dominates the spin dynamics of the 197.9 K sample close to TC, the paramagnetic to ferromagnetic transition for the 300.9 K sample is more conventional. These results, combined with seemingly inconsistent earlier reports, reveal clear systematics in the spin dynamics of the manganites.

Original languageEnglish (US)
Pages (from-to)4012-4015
Number of pages4
JournalPhysical review letters
Volume80
Issue number18
DOIs
StatePublished - 1998

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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