The development of texture in Co-Cr films

Abstract

Texture development as a function of film thickness (5-980 nm) was investigated for two series of CoslCr19 films. In general, the films were strongly textured. The orientation ratio, OR,, was used to describe the strength of the texture. Experimental data showed that for the Series A films (5-200 nm), the OR, value increased with increasing film thickness, while for Series B films (46-980 nm), the OR, as a function of the film thickness described a single peak curve, with its maximum near 130 nm. The calculated local orientation ratios OR, for both the Series A and B films had maxima near 110 nm. The strain in CO-Cr films also changes with the film thickness. In the case of the Series B films, the strain along the film normal gradually changed from a tensile to a compressive strain with increasing film thickness, and near 130 nm the film was in a stress-free condition. It was also discovered that for CO-Cr films thinner than 46 nm, the aspect ratio of the grains approaches 1 and the typical columnar structure of grains is not observed, although (0002) fibre texture still exists.

Magnetic properties of Ni nanowires in self-assembled arrays

“…Although the characteristic coercivity of nanowires is mainly determined by their diameters, it has been found that coercivity also depends on the packing density of the alumite template. 6,12 Coercivity of nanowires decreases slightly with increasing packing density, and this can be explained in terms of interwire magnetostatic interactions. 6,12 Previous studies on magnetization reversal of nanowires treated the wires as single-domain infinite cylindrical particles.…”

“…6,12 Coercivity of nanowires decreases slightly with increasing packing density, and this can be explained in terms of interwire magnetostatic interactions. 6,12 Previous studies on magnetization reversal of nanowires treated the wires as single-domain infinite cylindrical particles. Two reversal modes have been suggested as being important, curling and the coherent rotation mode.…”

“…Two reversal modes have been suggested as being important, curling and the coherent rotation mode. 12 There exists a critical radius R c : If RϽR c , reversal occurs by coherent-rotation, and if RϾR c , the reversal occurs by curling ͑see, e.g., Refs. 9, 13, and references therein͒.…”

The influence of the textural development on magnetic properties in Co-Cr thin films

“…where /3 is the circumferential angle of pole figure. In our case, the value of F(a,/3) is assumed to be equal to F(a), since the texture in the a-Co phase exhibits high degree of rotational symmetry about the film normal [9]. The difference (a 2 -a 1) is equal to 0.1 °.…”

Bitter colloid observations of magnetic structures in perpendicular magnetic recording media

“…However, alumite gives good contrast between the iron needles and the aluminium oxide matrix in the SEM and has a very hard surface, which can be used many times for colloid preparations without damaging. A lot of work has been done about the dependence of the magnetic behaviour of alumite on the morphology parameters [17,18]. The magnetic reversal mode in alumite is found to be curling, but the angular dependence of the coercivity suggests particle interactions [19].…”