J. Phys. IV France 07 (1997) C1-585-C1-586
Diffuse Neutron Scattering of the High Temperature Phase of Fe3O4K. Siratori1, Y. Ishii2, Y. Morii2, S. Funahashi3 and A. Yanase4
1 Department of Physics, Faculty of Science, Kyushu University, Fukuoka 812-81, Japan
2 Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-11, Japan
3 Institute for Solid State Physics, University of Tokyo, Minato, Tokyo 106, Japan
4 College of Integrated Arts and Sciences, University of Osaka Prefecture, Sakai, Osaka 593, Japan
Diffuse neutron scattering is observed for the high temperature phase of magnetite, Fe3O4, in an extended range in the (001) and (011) plane of the Brillouin zone. Contours of scattered intensity shows a characteristic pattern, discs in the (100) plane around the Γ points, spheres around the X points, etc. The intensity of this diffuse scattering increases with decreasing temperature down to the Verwey point and is attributed to the lattice distortion induced by charge fluctuation in the B site, or polarons. Symmetry and the polarization of the atomic displacement are discussed on the observation.
© EDP Sciences 1997