title: Magnetic phases of a highly frustrated magnet, ZnCr2O4, up to an ultrahigh magnetic field of 600 T.
abstract: The Faraday rotation and magneto-optical absorption spectral measurements were conducted to reveal the full-magnetization process and map out a magnetic phase diagram of a typical geometrical frustrated magnet, ZnCr(2)O(4), by using the electro-magnetic flux compression method in ultrahigh magnetic fields up to 600 T. A fully polarized ferromagnetic phase is observed in which the absorption spectra associated with an exciton-magnon-phonon transition disappears. Furthermore, prior to the fully polarized ferromagnetic phase above 410 T, we found a novel magnetic phase above 350 T at 4.6 K followed by a canted 3∶1 phase.
authors.affiliation: Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba, Japan.
authors.forename: Atsuhiko
authors.initials: A
authors.lastname: Miyata
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Ueda
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Ueda
authors.forename: Hironobu
authors.initials: H
authors.lastname: Sawabe
authors.forename: Shojiro
authors.initials: S
authors.lastname: Takeyama