title: Pressure-induced transition from a charge-disproportionated antiferromagnetic state to a charge-uniform ferromagnetic state in Sr(2/3)La(1/3)FeO3.
abstract: The perovskite oxide Sr(2/3)La(1/3)FeO3 has been found to switch its electronic ground state drastically at 23 GPa through measurements of 57Fe Mössbauer spectroscopy and powder x-ray diffraction up to 56 GPa. In the low-pressure region a first-order transition from a charge-uniform paramagnetic metallic phase to a charge-disproportionated (3Fe(11/3+)-->2Fe(3+)+Fe5+) antiferromagnetic insulating phase occurs at 207 K at 0.1 MPa and 165 K at 21 GPa, typically. Above 25 GPa, however, a charge-uniform ferromagnetic (and most probably metallic) phase persists below 300 K. This switching occurs at a lattice volume of V(23 GPa)/V(0)(0.1 MPa) = 0.89.
authors.affiliation: Department of Physical Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kawakami
authors.forename: S
authors.initials: S
authors.lastname: Nasu
authors.forename: T
authors.initials: T
authors.lastname: Sasaki
authors.forename: K
authors.initials: K
authors.lastname: Kuzushita
authors.forename: S
authors.initials: S
authors.lastname: Morimoto
authors.forename: S
authors.initials: S
authors.lastname: Endo
authors.forename: T
authors.initials: T
authors.lastname: Yamada
authors.forename: S
authors.initials: S
authors.lastname: Kawasaki
authors.forename: M
authors.initials: M
authors.lastname: Takano