High magnetic field magnetization study in cadmium-cobalt ferrite single crystals

Abstract

Magnetization measurements performed on single crystals of cobalt and substituted cadmium cobalt ferrites are presented under high magnetic field up to 180 kOe in the 4.2–300 K temperature range. Two substitution rates (x=0.01 and 0.1) are studied. In each case [100] is found to be the easy direction of magnetization as in the pure cobalt ferrite while an abrupt field induced transition is observed along the [111] direction below 150 K. A net increase of the spontaneous magnetization due to the cadmium presence is evidenced. The exchange constant values in the pure cobalt ferrite are discussed and a new set of constants is obtained.