The magnetic properties of highiHcSmhyphen;Co, Ndhyphen;Fehyphen;B, and Smhyphen;Tihyphen;Fe films crystallized from amorphous deposits

摘要

Permanent magnet films of the compounds SmCo5, Nd2Fe14B, and a high intrinsic coercive force,iHc, Smhyphen;Tihyphen;Fe phase have been prepared by a twohyphen;stage process in which the appropriate compositions were first deposited with a magnetic field applied in the substrate plane, and then subsequently crystallizedinsituin this same magnetic field. The resulting samples exhibited highiHcvalues and specular reflecting surfaces. For the case of SmCo5and for the highiHcSmhyphen;Tihyphen;Fe phase, samples were synthesized that exhibited extreme inhyphen;thehyphen;filmhyphen;plane anisotropy. For these SmCo5and highiHcSmhyphen;Tihyphen;Fe samples magnetic measurements, made at room temperature, indicated an inhyphen;thehyphen;filmhyphen;plane anisotropy constant of at least 107erg/cm3for magnetizing the films in the film plane parallel versus perpendicular to the field that had been applied during the sputter deposition and crystallization. A model is presented based upon the crystallite grain sizes and magnetic alignment energy that correlates the differences in the degree of inhyphen;thehyphen;filmhyphen;plane anisotropy induced in these systems. The model is applied to these systems as prepared by crystallizing amorphous deposits, and as directly crystallized onto heated substrates.