title: Spatially homogeneous ferromagnetism below the enhanced Curie temperature in EuO(1-x) thin films.
abstract: We have used low-energy implanted muons as a volume sensitive probe of the magnetic properties of EuO(1-x) thin films. We find that static and homogeneous magnetic order persists up to the elevated T(C) in the doped samples, and the muon signal displays the double dome feature also observed in the sample magnetization. Our results appear incompatible with either the magnetic phase separation or bound magnetic polaron descriptions previously suggested to explain the elevated T(C), but are compatible with an RKKY-like interaction mediating magnetic interactions above 69 K.
authors.affiliation: Physics Department, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom. pmdsm2@cam.ac.uk
authors.forename: Pedro M S
authors.initials: PM
authors.lastname: Monteiro
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Baker
authors.forename: Adrian
authors.initials: A
authors.lastname: Ionescu
authors.forename: Crispin H W
authors.initials: CH
authors.lastname: Barnes
authors.forename: Zaher
authors.initials: Z
authors.lastname: Salman
authors.forename: Andreas
authors.initials: A
authors.lastname: Suter
authors.forename: Thomas
authors.initials: T
authors.lastname: Prokscha
authors.forename: Sean
authors.initials: S
authors.lastname: Langridge