Abstract
The mixed cubic ferrite Zn0.85Co0.15Fe2O4 is studied by neutron diffraction and Mossbauer effect techniques in the temperature range 4.2-293K. The spectra obtained by both methods at low temperature show a long-range magnetic ordering. The neutron pattern at 4.2K is successfully indexed on the basis of a magnetic unit cell, obtained by doubling the chemical unit cell in one direction. The experimental data favour a non-collinear model of the magnetic structure.