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Evolution of the low-frequency spin dynamics in ferromagnetic manganites | | J. A. Fernandez-Baca
; P. Dai
; H. Y. Hwang
; S-W. Cheong
; C. Kloc
; | | Date: |
15 Oct 1997 | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | Elastic and inelastic neutron scattering was used to study two ferromagnetic manganites A$_{1-x}$B$_{x}$MnO$_3$ (x $approx$ 0.3) with $T_c$=197.9 K and 300.9 K. The spin dynamical behavior of these is similar at low temperatures, but drastically different at temperatures around $T_c$. While the formation of spin clusters of size ($sim20$ AA) dominates the spin dynamics of the 197.9 K sample close to $T_c$, 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. | | Source: | arXiv, cond-mat/9710160 | | Services: | Forum | Review | PDF | Favorites | |
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