Spin Excitation Spectrum ofLa1-xAxMnO3

1996/02/05 by Nobuo Furukawa · 4 citations
Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #cond-mat

paper · pdf · doi:10.1143/jpsj.65.1174

10 pages LaTeX including 4 PS figures

arxiv created 1996/02/05 · openalex publication_date 1996/05/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

As an effective model to describe perovskite-type manganates (La,A)MnO₃, the double-exchange model on a cubic lattice is investigated. Spin excitation spectrum of the model in the ground state is studied using the spin wave approximation. Spin wave dispersion relation observed in the inelastic neutron scattering experiment of La_0.7Pb_0.3MnO₃ is reproduced. Effective values for the electron bandwidth as well as Hund's coupling is estimated from the data.

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