Nanometers-thick self-organized Fe stripes: bridging the gap between surfaces and magnetic materials

TL;DR

This paper reports the fabrication of 5nm-high Fe(110) stripes via self-organized growth on vicinal surfaces, demonstrating room-temperature magnetic properties that could overcome superparamagnetism for potential applications.

Contribution

It introduces a novel self-organized growth method to produce nanometer-thick Fe stripes with stable magnetic properties at room temperature.

Findings

Fe stripes are 5nm high and self-organized on vicinal surfaces.

Room-temperature remanence, coercivity, and domain patterns observed.

Potential to overcome superparamagnetism in nanoscale magnetic systems.

Abstract

We have fabricated 5nm-high Fe(110) stripes by self-organized (SO) growth on a slightly vicinal R(110)/Al2O3(11-20) surface, with R=Mo, W. Remanence, coercivity and domain patterns were observed at room temperature (RT). This contrasts with conventional SO epitaxial systems, that are superparamagnetic or even non-magnetic at RT due to their flatness. Our process should help to overcome superparamagnetism without compromise on the lateral size if SO systems are ever to be used in applications.