Magnetization curling in films used for perpendicular magnetic recording

Abstract

Articles you may be interested inReduction of grain size and intergrain interaction in Fe Pt ∕ Pt ∕ Cr trilayer thin films for perpendicular magnetic recording J. Appl. Phys. 99, 08E709 (2006); 10.1063/1.2171941BaM/Pt multilayered films with fine grains and large perpendicular magnetic anisotropy for high density recording media Co ferrite films with excellent perpendicular magnetic anisotropy and high coercivity deposited at low temperatureThe magnetization-curling mode in a columnar-structure film with perpendicular magnetization is studied on the assumption that the film is a two-dimensional array of cylinders. The angular dependence of the nucleation field H N is calculated by the Ritz method and compared with that for the coherent-rotation mode. It is found that the magnetization rotates in the curling mode for a large reduced radius S and in the coherent-rotation mode for a small S. The angular dependence of H N is different from that in an infinite cylinder. If S is large, the magnetization rotates in the curling mode for any value of 0 , where 0 is the angle between the applied field and the cylinder axis. When S is medium, the magnetization rotates in the coherent-rotation mode for a small 0 and in the curling mode for a large 0 .

Fanning Mode in a Perpendicular Magnetic Film

“…The magnetization process of a CoCr film used for perpendicular magnetic recording cannot be explained on the basis of the coherent-rotation mode. [I] .As reported in previous papers, [2][3][4] however, both of the incoherent modes suggested by Frei et a1. [5], the curling and buckling modes, are inappropriate for describing the magnetization process of a columnar-structure film for high-density perpendicular magnetic recording media.…”

Angular dependence of coercivity in magnetic nanotubes

“…As pointed out by Landeros et al [7], the curling reversal mode is the dominant magnetization reversal process in magnetic nanotubes. The magnetization curling mode was proposed by Frei et al [14] and has been used to investigate the magnetic switching of films [15] and particles with different geometries, like spheres [14], prolate ellipsoids [14,16] and cylinders [17]. However, for simplicity, expressions for the nucleation field obtained using infinite cylinders are used.…”

Angular dependence of magnetic properties in Ni nanowire arrays

“…The curling mode was proposed by Frei et al [27] and has been used to investigate magnetic switching in films [28] and particles with different geometries, like spheres [27], prolate ellipsoids [27,29], and cylinders [30]. However, for simplicity, expressions for the nucleation field obtained using infinite cylinders are used in all cases.…”