Evolution of spin-wave excitations in ferromagnetic metallic manganites.
Publication/Presentation Date
2-3-2006
Abstract
Neutron scattering results are presented for spin-wave excitations of three ferromagnetic metallic A1-xA'xMnO3 manganites (where A and A' are rare- and alkaline-earth-metal ions), which when combined with previous work elucidate the systematics of the interactions as a function of carrier concentration x, on-site disorder, and strength of the lattice distortion. The long-wavelength spin dynamics show only a very weak dependence across the series. The ratio of fourth to first neighbor exchange (J4/J1) that controls the zone boundary magnon softening changes systematically with x, but does not depend on the other parameters. None of the prevailing models can account for these behaviors.
Volume
96
Issue
4
First Page
047204
Last Page
047204
ISSN
0031-9007
Published In/Presented At
Ye, F., Dai, P., Fernandez-Baca, J. A., Sha, H., Lynn, J. W., Kawano-Furukawa, H., Tomioka, Y., Tokura, Y., & Zhang, J. (2006). Evolution of spin-wave excitations in ferromagnetic metallic manganites. Physical review letters, 96(4), 047204. https://doi.org/10.1103/PhysRevLett.96.047204
Disciplines
Medicine and Health Sciences | Oncology
PubMedID
16486884
Department(s)
Department of Radiation Oncology
Document Type
Article