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Study of the magneto-optical properties of Ba-ferrite particulate media reveals that the media's magneto-optical output is maximum at a particular thickness. The study involves the measurement of the magnetic reflectivity and Faraday rotation for various thicknesses of the magnetic layer. The equations which approximate toward the Faraday rotation and reflectivity help explain the influence of thickness on the magneto-optical output.

Determination of the magneto-optical readout properties of Ba-ferrite particulate media reveals that the domain pattern has obscure boundaries between magnetized areas situated side by side. The magneto-optical readout properties are investigated by magnetic head recording. The noise component in the readout is reproduced by the Faraday effect.

Presents information on a study which measured the magnetic anisotropy constant of barium-ferrite platelet particles using torque magnetometer. Characteristics of barium-ferrite particles; Experimental procedure; Results and discussion; Conclusions.

Provides information on a study that applied the Mössbauer techniques on two types of tapes to evaluate the orientation of particles in magnetic recording tapes. Details on the experimental procedure; Results and discussion; Conclusions.

Presents a study that examined the adsorption behavior of organic titanate on an iron foil having an ideal iron oxide surface to improve read-write characteristics of particulate magnetic recording media by the surface treatment of iron oxide magnetic particles with organic titanate. Effect of titanate on the surface hydrophilicity of oxide surface of the iron foil; Formation of the chemical bonding between the titanate and the oxide; Application of the method to cobalt-modified oxide.