title: Interaction-induced partitioning and magnetization jumps in the mixed-spin oxide FeTiO3-Fe2O3.
abstract: In this study we report on jumps in the magnetic moment of the hemo-ilmenite solid solution (x)FeTiO(3)-(1-x)Fe(2)O(3) above Fe(III) percolation at low temperature (T<3 K). The first jumps appear at 2.5 K, one at each side of the magnetization loop, and their number increases with decreasing temperature and reaches 5 at T=0.5 K. The jumps occur after field reversal from a saturated state and are symmetrical in the trigger field and intensity with respect to the field axis. Moreover, an increase of the sample temperature by 2.8% at T=2.0 K indicates the energy released after the ignition of the magnetization jump, as the spin-currents generated by the event are dissipated in the lattice. The magnetization jumps are further investigated by Monte Carlo simulations, which show that these effects are a result of magnetic interaction-induced partitioning on a sublattice level.
authors.affiliation: Institute of Geophysics, Department of Earth Sciences, ETH Zurich, CH-8092 Zurich, Switzerland. michalis.charilaou@erdw.ethz.ch
authors.forename: M
authors.initials: M
authors.lastname: Charilaou
authors.forename: K K
authors.initials: KK
authors.lastname: Sahu
authors.forename: S
authors.initials: S
authors.lastname: Zhao
authors.forename: J F
authors.initials: JF
authors.lastname: Löffler
authors.forename: A U
authors.initials: AU
authors.lastname: Gehring