Preparation and some magnetic properties of amorphous rare earth-transition metal films with perpendicular anisotropy for bubble memory

A preparation method for amorphous R-T films for magnetic bubbles is described. Positive K u is induced by a resputtering effect in amorphous Gd-Co and Gd-Co-Mo films. However, sputtering without resputtering effect and evaporation produce positive K u in amorphous R-T films such as Gd-Fe, Dy-Fe and so on. Some magnetic properties of amorphous R-T films are also described. The addition of Mo improves the chemical and thermal stabilities of films and it reduces a positive K u and T c . Annealing reduces positive K u , but enhances 4TM s , T c and exchange stiffness constant A.

[1]  James F. Ziegler,et al.  Effects of ion radiation damage on the magnetic domain structure of amorphous Gd–Co alloys , 1974 .

[2]  K. Kawanishi,et al.  Annealing effects on magnetic properties of amorphous GdCo, GdFe, and GdCoMo films , 1978 .

[3]  Shinji Ogawa,et al.  Anisotropic Distribution of Atomic Pairs Induced by the Preferential Resputtering Effect in Amorphous Gd-Fe and Gd-Co Films , 1978 .

[4]  Toshikazu Katayama,et al.  Magnetic properties of some gadolinium—Cobalt intermetallic compounds , 1981 .

[5]  Masahiro Hirano,et al.  Different origin of the perpendicular anisotropy in amorphous Gd-Fe from Gd-Co films , 1977 .

[6]  G. Rettinghaus,et al.  Backstreaming in diffusion pump systems , 1974 .

[7]  Masahiro Hirano,et al.  Role of the DC Bias in RF Sputtering Process of Amorphous Gd–Co Films , 1977 .

[8]  Richard Joseph Gambino,et al.  Amorphous metallic films for bubble domain applications , 1973 .

[9]  K. L. Chopra,et al.  Thin Film Phenomena , 1969 .

[10]  M. Kryder,et al.  Bubble to T-I bar coupling in amorphous film small bubble devices , 1974 .

[11]  J. J. Cuomo,et al.  Influence of sputtering parameters on the composition of multicomponent films , 1975 .

[12]  Masahiro Hirano,et al.  Dominant Contribution of Preferential Resputtering Effect on Perpendicular Uniaxial Anisotopy in Amorphous Gd–Co Films , 1977 .

[13]  Shinji Ogawa,et al.  Effects of Third Elements on the Magnetic Anisotropy of Sputtered Amorphous GdCo Film , 1979 .

[14]  M. Kryder,et al.  Amorphous film magnetic bubble domain devices , 1975 .