Neutron Diffraction and Mossbauer Effect Study of a Cobalt Substituted Zinc Ferrite

Abstract

The mixed cubic ferrite Zno.g5 €00.15 Fez 04 is studied by neutron diffraction and Mossbauer effect techniques at the temperature range 4.2 - 293 °K. The obtained spectra by both methods at low temperature show a long range magnetic ordering. The neutron pattern at 4.2 °K is successfully indexed on the basis of a magnetic unit cell obtained by doubling the chemical unit cell in one direction. A non collinear model is proposed for the magnetic structure of this compound. The Mossbauer effect data favour the proposed model and indicate that the magnetic moments are aligned at an angle of about 55° relative to the [112] direction in the magnetic unit cell.