Effects of Interatomic Coupling on Magnetic Anisotropy and Order of Spins on Metallic Surfaces

Both quantum and classical behavior of single atomic spins on surfaces is determined by the local anisotropy of adatoms and their coupling to the immediate electronic environment. Yet adatoms seldom reside on surfaces alone and it is generally acknowledged that substrated-mediated interactions can c...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2015-11
Main Authors: Ruiz-Díaz, P, Stepanyuk, O V, Stepanyuk, V S
Format: Article
Language:English
Subjects:
Adatoms
Anisotropy
Coupling
Dimers
Magnetic anisotropy
Magnetic properties
Magnetization curves
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Both quantum and classical behavior of single atomic spins on surfaces is determined by the local anisotropy of adatoms and their coupling to the immediate electronic environment. Yet adatoms seldom reside on surfaces alone and it is generally acknowledged that substrated-mediated interactions can couple single spins among each other impacting their magnetic behavior. Here we show that also magnetic anisotropy, which is usually considered to be a constant determined by the local crystal field, can be extremely sensitive to such interactions. By the example of Co dimers on Cu(001) and Pt(001) surfaces we highlight the intricate interplay of exchange coupling and magnetic anisotropy providing a much sought possibility to tune the latter through deliberate adjustment of the adatoms' separation. As a technologically relevant implication we demonstrate the impact of such emergent non-local anisotropy on the hysterectic properties of single-atom magnetization curves.
ISSN:2331-8422
DOI:10.48550/arxiv.1502.03743