Dynamic Jahn-Teller Effect and Colossal Magnetoresistance in La 1-x Sr x MnO 3
TLDR
A model which incorporates the physics of dynamic Jahn-Teller and double-exchange effects is presented and solved via a dynamical mean field approximation to reproduce the behavior of the resistivity and magnetic transition temperature observed in Sr_x MnO_3.Abstract:
A model for the doped rare-earth manganites such as ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$ incorporating the physics of dynamic Jahn-Teller and double-exchange effects is presented and solved via a dynamical mean field approximation. The interplay of these two effects as the electron phonon coupling is varied reproduces the observed behavior of the resistivity and magnetic transition temperature.read more
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Journal ArticleDOI
Electron-phonon interactions in perovskites containing Fe and Cr studied by Raman scattering using oxygen-isotope and cation substitution
Jakob Andreasson,Joakim Holmlund,R. Rauer,Mikael Käll,Lars Börjesson,Christopher S. Knee,Annika K. Eriksson,Sten-G. Eriksson,Michael Rübhausen,R. P. Chaudhury +9 more
TL;DR: In this paper, temperature-dependent inelastic light scattering was used to study the origin of the strong multiphonon scattering of a local oxygen breathing mode present in the mixed $B$-site orthorhombic (space group $Pnma$) perovskite.
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Theory of colossal magnetoresistance in doped manganites
TL;DR: In this article, it was shown that the carrier density collapse explains the colossal magnetoresistance of doped manganites close to the transition, which is a consequence of local bound-pair formation in the paramagnetic phase, is extremely sensitive to an external magnetic field.
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Colossal magnetoresistance and charge order in la1-xcaxmno3 (invited)
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Journal ArticleDOI
Influence of Sm-doping on the structural, magnetic, and electrical properties of La0.8−xSmxSr0.2MnO3 (0 < x < 0.45) manganites
TL;DR: In this article, structural, magnetic, and electrical properties of the La0.8−xSmxSr0.2MnO3 manganites prepared by a solid-state reaction technique was studied systematically.
Book ChapterDOI
Magnetic Properties of Perovskite Manganites and Their Modifications
TL;DR: In this article, the authors systematically outline some fundamentals and key experimental results concerning magnetic properties of perovskite manganites, focusing on magnetocaloric properties, pressure effect on magnetic properties, and magnetism of manganite nanoparticles.