Observation of Magnetic Compton Profile of Interface Controlled Co/Pd Multilayer

Abstract

We compare two Co/Pd multilayers with correspondingly smooth and rough interfaces. The first is a Co (1.5 nm)/Pd (2.6 nm) multilayer with a smooth interface deposited by the MBE technique, and the second is a Co (1.6 nm)/Pd (4.0 nm) multilayer with a rough interface deposited by the sputter technique. Both multilayers have almost the same perpendicular magnetic anisotropy energy, 1.15 Merg/cc for the Co (1.5 nm)/Pd (2.6 nm) multilayer and 1.20 Merg/cc for the Co (1.6 nm)/Pd (4.0 nm) multilayer, respectively. The symmetry of the wave function, which is measured using the magnetic Compton profile, is almost the same for both multilayers. This suggests that the smooth interface controls the wave function and enhances the PMA energy even if the Co/Pd multilayer has a thinner Pd layer.

Structural and morphological effect of Ti underlayer on Pt/Co/Pt magnetic ultra-thin film

“…They pointed out that PMA decreases due to diffusion at rough interfaces. In accordance with [37,38] studies, it is suggested in our case that the Ti under-layer supports PMA by making both the Pt and Co surface smoother (i.e.…”

“…On the other hand, the RMS roughness value (204. promoting PMA [37][38][39]. In our case, the sharper interface (or less rough interface) between Pt and Co layer may also help to promote the PMA in tpcp samples.…”

“…In addition to the fcc texture 111 ( ) growth, the smooth interfaces are also known to support promoting the PMA. [36][37][38] In our case, the sharper interface between Pt and Co layer may also help to promote the PMA in tpcp samples. K. Suzuki 37) et al also suggested that a smooth interface enhances the PMA in Co/Pd multilayer film.…”

“…In our case, the sharper interface (or less rough interface) between Pt and Co layer may also help to promote the PMA in tpcp samples. Besides, Kosuke Suzuki [38] et al also suggested that a smooth interface enhances the PMA in Co/Pd multilayer film. According to their work, the higher PMA energy can be achieved with a smoother interface even if the lower Pd thickness was used in the Co/Pd multilayer film.…”

Formation of Magnetic Anisotropy by Lithography

“…The roughness of the Co/Pt and Co/Pd interfaces in the stripe patterns is expected to be poorer than that in conventional [Co/Pt] and [Co/Pd] multilayers, which are formed during deposition. Because the interface anisotropy is sensitive to the smoothness of the interface 4 5 6 7 , the anisotropy formed in the Co/Pt and Co/Pd stripe patterns is expected to be small. In spite of this, the formation of interface anisotropy in Co/Pt and Co/Pd stripe patterns can be of significant importance, because magnetic anisotropy can be formed using lithography.…”