On the nature of the anomalous negative magnetoresistance and para-process in magnetite and manganese ferrite at low temperatures
Belov K. P., Goryaga A. N., Pronin V. N., Skipetrova L. A.
Based on analysis of experimental measurements of the electrical and magnetic properties of magnetite and manganese ferrite, the conclusion is reached that a new mechanism of the para-process and negative magnetoresistance exists in these magnets at low temperatures. This mechanism is based on the derealization by the external magnetic field of t2g electrons paired in cation-i?-cation-l? covalent bonds.