Growth and magnetism of self-organized arrays of Fe(110) wires formed by deposition on kinetically grooved W(110)

TL;DR

This study demonstrates the fabrication of Fe(110) nanowires within kinetically grooved W(110) templates, revealing their magnetic properties and how the nanowire array's topography can be controlled via deposition parameters.

Contribution

It introduces a method to create self-organized Fe(110) nanowire arrays on W(110) templates with tunable spacing and investigates their magnetic behavior.

Findings

Nanowire arrays exhibit an easy magnetic axis along [001].

The blocking temperature of the Fe/W wires is approximately 100K.

Lateral period of the grooves can be tuned from 4 to 12 nm by adjusting temperature.

Abstract

Homoepitaxy of W(110) and Mo(110) is performed in a kinetically-limited regime to yield a nanotemplate in the form of a uniaxial array of hills and grooves aligned along the [001] direction. The topography and organization of the grooves were studied with RHEED and STM. The nanofacets, of type {210}, are tilted 18° away from (110). The lateral period could be varied from 4 to 12nm by tuning the deposition temperature. Magnetic nanowires were formed in the grooves by deposition of Fe at 150°C on such templates. Fe/W wires display an easy axis along [001] and a mean blocking temperature Tb=100K