title: Metamagnetic transitions in electron-doped single crystals of manganites Ca(1-x)(Ln)(x)MnO3, (Ln = La, Ce; x ≤ 0.12).
abstract: The magnetization curves of Ca(1-x)(Ln)(x)MnO(3) single crystals, where Ln denotes La or Ce, x ≤ 0.12, have been measured in pulsed magnetic fields up to 350 kOe. The metamagnetic transitions for compositions with x = 0.10 and 0.12 have been observed in the temperature range 77-240 K. The hysteresis around the transition for the sweep-up and sweep-down branches of the magnetization curve is wide for x(Ce) = 0.10 and 0.12, and relatively narrow for x(La) = 0.12. The maximum magnetization value reaches ~50% from its theoretical value for x(Ce) = 0.10 and 0.12, and ~24% for x(La) = 0.12 in a magnetic field H = 350 kOe. The metamagnetic transition has been attributed to the melting of orbital/charge ordering in the dielectric antiferromagnetic C-type phase, which is accompanied by the growth of the volume of the conductive phase with antiferromagnetic G-type ordering and ferromagnetic contribution.
authors.affiliation: Institute of Metal Physics, Ural Division of RAS, Kovalevskaya Street 18, Ekaterinburg 620990, Russia. loshkareva@imp.uran.ru
authors.forename: N N
authors.initials: NN
authors.lastname: Loshkareva
authors.forename: E G
authors.initials: EG
authors.lastname: Gerasimov
authors.forename: N V
authors.initials: NV
authors.lastname: Mushnikov
authors.forename: A V
authors.initials: AV
authors.lastname: Korolyov
authors.forename: A M
authors.initials: AM
authors.lastname: Balbashov