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Observation of the Magnetization Reorientation in Self-Assembled Metallic Fe-Silicide Nanowires at Room Temperature by Spin-Polarized Scanning Tunneling Spectromicroscopy

1
Department of Electrophysics, National Chiayi University, Chiayi 60004, Taiwan
2
Institute of Optoelectronics and Solid State Electronics, National Chiayi University, Chiayi 60004, Taiwan
*
Author to whom correspondence should be addressed.
Coatings 2019, 9(5), 314; https://doi.org/10.3390/coatings9050314
Received: 4 March 2019 / Revised: 5 May 2019 / Accepted: 8 May 2019 / Published: 10 May 2019
(This article belongs to the Special Issue Metal-Semiconductor and Insulator-Semiconductor Interfaces)
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Abstract

The quasi-periodic magnetic domains in metallic Fe-silicide nanowires self-assembled on the Si(110)-16 × 2 surface have been observed at room temperature by direct imaging of both the topographic and magnetic structures using spin-polarized scanning tunneling microscopy/spectroscopy. The spin-polarized differential conductance (dI/dV) map of the rectangular-sectional Fe-silicide nanowire with a width and height larger than 36 and 4 nm, respectively, clearly shows an array of almost parallel streak domains that alternate an enhanced (reduced) density of states over in-plane (out-of-plane) magnetized domains with a magnetic period of 5.0 ± 1.0 nm. This heterostructure of magnetic Fe-silicide nanowires epitaxially integrated with the Si(110)-16 × 2 surface will have a significant impact on the development of Si-based spintronic nanodevices. View Full-Text
Keywords: Fe-silicide; nanowire; self-assembly; Si(110); magnetic domain; spin-polarized scanning tunneling microscopy Fe-silicide; nanowire; self-assembly; Si(110); magnetic domain; spin-polarized scanning tunneling microscopy
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Hong, I.-H.; Liu, S.-W. Observation of the Magnetization Reorientation in Self-Assembled Metallic Fe-Silicide Nanowires at Room Temperature by Spin-Polarized Scanning Tunneling Spectromicroscopy. Coatings 2019, 9, 314.

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