1997/10/15 by J. A. Fernandez-Baca, J. A. Fernandez‐Baca, P. Dai +7 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.80.4012
zipped RevTeX file (7 pages) and 4 postscript figures
arxiv created 1997/10/15 · openalex publication_date 1998/05/04 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Neutron scattering was used to study the ferromagnetic manganites Nd0.7Sr0.3MnO3 ( TC\phantom\rule0ex0ex=\phantom\rule0ex0ex197.9\phantom\rule0ex0exK) and Pr0.63Sr0.37MnO3 ( TC\phantom\rule0ex0ex=\phantom\rule0ex0ex300.9\phantom\rule0ex0exK). 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 ( \ensuremath∼20\AA) 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.