Lattice effects on the charge and spin dynamics in perovskite manganites (invited) (abstract)
- Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974 (United States)
A detailed study of doped LaMnO{sub 3} with a fixed carrier concentration has revealed a rich phase diagram as a function of the average ionic radius of the La site {l_angle}r{sub A}{r_angle}. The transition temperature T{sub C}, from a high-temperature paramagnetic insulator to a low-temperature ferromagnetic metal, decreases rapidly with reduced {l_angle}r{sub A}{r_angle}. Systematic trends in the magnetotransport properties and the spin dynamics are strongly correlated with the proximity of the zero-temperature insulator phase. The general structure of this phase diagram can be understood by considering the role of static and dynamic distortions of the MnO{sub 6} octahedra and their evolution as a function of {l_angle}r{sub A}{r_angle}.{copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 496581
- Report Number(s):
- CONF-961141--
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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