title: Evolution of magnetic polarons and spin-carrier interactions through the metal-insulator transition in Eu(1-x)Gd(x)O.
abstract: Raman scattering studies as functions of temperature, magnetic field, and Gd substitution are used to investigate the evolution of magnetic polarons and spin-carrier interactions through the metal-insulator transition in Eu(1-x)Gd(x)O. These studies reveal a spin-fluctuation-dominated paramagnetic (PM) regime for T>T*>T(C), and a coexistence regime for T<T* in which spin polarons develop and coexist with remnants of the PM phase. They further show a strong connection between spin cluster formation and the dramatic field effects observed in these materials.
authors.affiliation: Department of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
authors.forename: H
authors.initials: H
authors.lastname: Rho
authors.forename: C S
authors.initials: CS
authors.lastname: Snow
authors.forename: S L
authors.initials: SL
authors.lastname: Cooper
authors.forename: Z
authors.initials: Z
authors.lastname: Fisk
authors.forename: A
authors.initials: A
authors.lastname: Comment
authors.forename: J-Ph
authors.initials: JP
authors.lastname: Ansermet