Griffiths singularities and magnetoresistive manganites
نویسندگان
چکیده
منابع مشابه
Griffiths phase, metal-insulator transition, and magnetoresistance of doped manganites
A phenomenological model is developed for systematic study of the universal features in metal-insulator transition and magnetoresistivity of mixed-phase manganites. The approach is based on utilization of some hypothesis appropriate to the Preisach picture of the magnetization process for half-metallic ferromagnets and an assumption that in doped manganites a Griffiths-type phase exists just ab...
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Neutron scattering measurements on a bilayer manganite near optimal doping show that the short-range polaron correlations are completely dynamic at high T, but then freeze upon cooling to a temperature T(*) approximately equal 310 K. This glass transition suggests that the paramagnetic/insulating state arises from an inherent orbital frustration that inhibits the formation of a long-range orbit...
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V. Esposito,1,* L. Rettig,1,2 E. Abreu,3 E. M. Bothschafter,1 G. Ingold,1,4 M. Kawasaki,5,6 M. Kubli,3 G. Lantz,3 M. Nakamura,5,7 J. Rittman,1,4 M. Savoini,3 Y. Tokura,5,6 U. Staub,1 S. L. Johnson,3 and P. Beaud1,4,† 1Swiss Light Source, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland 2Fritz Haber Institute, 14195 Berlin, Germany 3Institute for Quantum Electronics, ETH Zürich, 8093 Züric...
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Spin wave measurements have been carried out in ferromagnetic (F) La(1-x)(Sr,Ca)(x)MnO(3) with x(Sr) = 0.15, 0.175, 0.2, 0.3, and x(Ca) = 0.3. In all q directions, close to the zone boundary, the spin wave spectra consist of several energy levels, with the same values in the metallic and the x approximately 1/8 doping ranges. For x(Sr) = 0.15, the data are quantitatively interpreted in terms of...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2003
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.68.014411