Reexamination of the temperature dependences of resonant reflections in highly stoichiometric magnetite.
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.
García
Joaquín
J
Instituto de Ciencia de Materiales de Aragón, CSIC-Universidad de Zaragoza, Pedro Cerbuna 12, 50009 Zaragoza, Spain. jgr@posta.unizar.es
Subías
Gloria
G
Herrero-Martín
Javier
J
Blasco
Javier
J
Cuartero
Vera
V
Sánchez
M Concepción
MC
Mazzoli
Claudio
C
Yakhou
Flora
F