THE MAGNETIC AND MAGNETOOPTICAL PROPERTIES OF AMORPHOUS (TBFECO)PR FILMS

Amorphous TbFeCo films have been manufactured with a rotating substrat e, multi-target, dc magnetron cosputtering process. The light rare ear th praseodymium (Pr) has been doped into these TbFeCo alloys in an att empt to increase the intrinsic polar Kerr rotation. Magneto-optical me asurements however, indicate a degradation of the Kerr rotation with P r content in the new alloys. The deterioration of the magnetic propert ies, the coercivity, the squareness of the hysteresis loop shape and t he perpendicular anisotropy are also shown to be a result of Pr substi tution.