Fabrication and uniaxial magnetic anisotropy of Co nanowires on a Pd(110) surface

Abstract

We have fabricated Co atomic chains and nanowires on a Pd(110) surface oriented along the [1-10] direction. This is possible due to high diffusion anisotropy of the Co adatom on the Pd(110) surface. The Co nanowires on Pd(110) exhibit a strong uniaxial in-plane magnetic anisotropy, in which the easy axis is along [1-10], i.e., nanowire direction.

Structure and magnetism of ultrathin Co and Fe films epitaxially grown on Pd/Cu(001)

“…The polarity change of the Kerr rotation and the negative offset in Co/Pd(1 1 1) is suggested to be evidence of an opposite direction of the polarized Pd moments with respect to Co moments [2]. Very similar properties are found for the Co films grown on Pd(1 1 0) [4]. In both cases, the loops change sign at the Co thickness of around 2 ML.…”

“…Below this thickness, an anomalous peak exists where the signals are larger than those of the thicker films. Moreover, the reversed loops (a negative rotation at positive fields) have been detected over the thickness range where the MOKE signal is anomalously large [4].…”

“…Most likely, the effect reflects a property of the Pd/Co interface comprising both the polarization of Pd and the enhanced moment of Co. Magneto-optical response from ultrathin Co films grown on Pd substrates behaves even more confusingly. An interesting observation comes from the MOKE analysis of the Co/Pd(1 1 0) system which has been performed at low temperature, and reported elsewhere [4]. The longitudinal signal taken along the [1 0 0] direction increases linearly with film thickness only above a thickness of Co at which the polar signal is no more detected.…”

Thermally activated magnetization reversal in monatomic magnetic chains on surfaces studied by classical atomistic spin-dynamics simulations

“…Such chains can be made as thin as monoatomic, i.e., their cross-section consists of a single atom, while they are usually a few nanometers or tens of nanometers long; they grow, e.g., at terrace step edges, in the "trenches" of (110) surfaces or as inclusions in surface alloys [1][2][3][4][5][6][7], so that their structure is rather stable, and they can be studied by a number of spin-sensitive techniques including spin-polarized scanning tunneling microscopy or x-ray magnetic circular dichroism. Magnetic chains, as all magnetic nanostructures, bear technological relevance due to the prospect of miniaturization of magnetic bits for information storage.…”

Study on NiO/Fe interface with X-ray photoelectron spectroscopy

“…Most theoretical models presume an ideal interface between FM and AFM. However, many reports indicate that magnetic properties are sensitive to the roughness, atomic diffusion, chemical status, and the geometrical structure of the interfaces [8][9][10][11][12][13][14]. In view of its applications, the properties of small-scale devices rely on the quality and thickness of the interfaces.…”