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000009905 084__ $$2WoS$$aPhysics, Multidisciplinary
000009905 1001_ $$0P:(DE-HGF)0$$aZhou, L.$$b0
000009905 245__ $$aStrength and directionality of surface Ruderman-Kittel-Kasuya-Yosida interaction mapped on the atomic scale
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000009905 440_0 $$014921$$aNature Physics$$v6$$x1745-2473$$y187 - 191
000009905 500__ $$aWe acknowledge financial support from SFB 668, GrK 1286 and SPP1153 of the DFG, from the ERC Advanced Grant 'FURORE', from the Cluster of Excellence 'Nanospintronics' and from the ESF EUROCORES Programme SONS under contract N. ERAS-CT-2003-980409. F. M. acknowledges financial support from the German Academic Exchange Service. We thank A. Lichtenstein, S. Schuwalow, S. Kettemann and K. Patton for discussions.
000009905 520__ $$aRuderman-Kittel-Kasuya-Yosida interaction(1-3) is an indirect magnetic coupling between localized spins in a non-magnetic host mediated by conduction electrons. In diluted systems it is often the dominating magnetic interaction and has played a key part in the development of giant magnetoresistance devices(4,5), drives ferromagnetism in heavy rare-earth elements(6) aswell as in diluted magnetic semiconductors(7) and gives rise to complex magnetic phases such as spin glasses(8). For bulk systems, an isotropic and continuous model of Ruderman-Kittel-Kasuya Yosida interaction is often sufficient. However, it can be misleading in magnetic nanostructures consisting of separate magnetic atoms adsorbed on the surface of a non-magnetic material. Here, an atomically precise map of the magnetic coupling between individual adatoms in pairs is measured and directly compared with first-principles calculations, proving that Ruderman Kittel-Kasuya-Yosida interaction is strongly directional. By investigating adatomtriplets of different shapes we demonstrate that the map can serve to tailor the magnetism of larger nanostructures.
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000009905 7001_ $$0P:(DE-HGF)0$$aVedmedenko, E.$$b3
000009905 7001_ $$0P:(DE-HGF)0$$aMeier, F.$$b4
000009905 7001_ $$0P:(DE-Juel1)130548$$aBlügel, S.$$b5$$uFZJ
000009905 7001_ $$0P:(DE-Juel1)130612$$aDederichs, P. H.$$b6$$uFZJ
000009905 7001_ $$0P:(DE-HGF)0$$aWiesendanger, R.$$b7
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000009905 8567_ $$uhttp://dx.doi.org/10.1038/nphys1514
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