title: Reexamination of the temperature dependences of resonant reflections in highly stoichiometric magnetite.
abstract: We have studied the temperature dependences of the so-called charge and orbital ordering reflections in the neighborhood of the Verwey transition by means of resonant x-ray scattering at the Fe K and L edges on a high purity single crystal of magnetite. Contrary to recently published results [J. E. Lorenzo, Phys. Rev. Lett. 101, 226401 (2008)10.1103/PhysRevLett.101.226401], we show that all the reflections studied disappear simultaneously at the Verwey transition for both edges, on and off resonance. This means that there is no correlation between the Verwey (123.5 K) and the spin-reorientation (130 K) transitions and that the resonant reflections are driven by the lattice distortions.
authors.affiliation: Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain. jgr@posta.unizar.es
authors.forename: Joaquín
authors.initials: J
authors.lastname: García
authors.forename: Gloria
authors.initials: G
authors.lastname: Subías
authors.forename: Javier
authors.initials: J
authors.lastname: Herrero-Martín
authors.forename: Javier
authors.initials: J
authors.lastname: Blasco
authors.forename: Vera
authors.initials: V
authors.lastname: Cuartero
authors.forename: M Concepción
authors.initials: MC
authors.lastname: Sánchez
authors.forename: Claudio
authors.initials: C
authors.lastname: Mazzoli
authors.forename: Flora
authors.initials: F
authors.lastname: Yakhou