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Published Online March 30, 2006
Science DOI: 10.1126/science.1125398

Reports

Submitted on January 25, 2006
Accepted on March 13, 2006

Spin Coupling in Engineered Atomic Structures

Cyrus F. Hirjibehedin 1*, Christopher P. Lutz 1, Andreas J. Heinrich 1

1 IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA.

* To whom correspondence should be addressed.
Cyrus F. Hirjibehedin , E-mail: hirjibe{at}us.ibm.com

We used a scanning tunneling microscope to probe the interactions between spins in individual atomic-scale magnetic structures. Linear chains of one to ten Mn atoms were assembled one atom at a time on a thin insulating layer, and the spin excitation spectra of these structures were measured with inelastic tunneling spectroscopy. We observed excitations of the coupled atomic spins that can change both the total spin and its orientation. Comparison with a model spin-interaction Hamiltonian yielded the collective spin configuration and the strength of the coupling between the atomic spins.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
The Force Needed to Move an Atom on a Surface.
M. Ternes, C. P. Lutz, C. F. Hirjibehedin, F. J. Giessibl, and A. J. Heinrich (2008)
Science 319, 1066-1069
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Large Magnetic Anisotropy of a Single Atomic Spin Embedded in a Surface Molecular Network.
C. F. Hirjibehedin, C.-Y. Lin, A. F. Otte, M. Ternes, C. P. Lutz, B. A. Jones, and A. J. Heinrich (2007)
Science 317, 1199-1203
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Science. ISSN 0036-8075 (print), 1095-9203 (online)