title: Heavy-mass fermi liquid near a ferromagnetic instability in layered ruthenates.
abstract: Low temperature magnetic, thermal, and transport measurements in Ca2-xSrxRuO4 clarify the appearance of a cluster glass phase, after the evolution of a nearly ferromagnetic heavy-mass Fermi liquid from the spin-triplet superconductor Sr2RuO4. As the Mott transition is approached across a 2nd-order structural transition, both the magnetization and specific heat decrease considerably while the transport scattering rate diverges. A metamagnetic transition to a highly spin polarized state, with a local moment S=1/2, is observed. We argue that an orbital rearrangement with Ca substitution changes itinerant ferromagnetism to antiferromagnetism of localized moments.
authors.affiliation: National High Magnetic Field Laboratory (NHMFL), Tallahassee, Florida 32310, USA.
authors.forename: S
authors.initials: S
authors.lastname: Nakatsuji
authors.forename: D
authors.initials: D
authors.lastname: Hall
authors.forename: L
authors.initials: L
authors.lastname: Balicas
authors.forename: Z
authors.initials: Z
authors.lastname: Fisk
authors.forename: K
authors.initials: K
authors.lastname: Sugahara
authors.forename: M
authors.initials: M
authors.lastname: Yoshioka
authors.forename: Y
authors.initials: Y
authors.lastname: Maeno