Lattice effects on the charge and spin dynamics in perovskite manganites (invited) (abstract)

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.364537· OSTI ID:496581

Hwang, H Y ^[1]

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1. 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

Related Subjects

36 MATERIALS SCIENCE
CARRIER MOBILITY
CRYSTAL STRUCTURE
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETORESISTANCE
MANGANESE OXIDES
PHASE DIAGRAMS
SPIN ORIENTATION
TRANSITION TEMPERATURE