Ferstl P, Hammer L, Sobel C, Gubo M, Heinz K, Schneider MA, Mittendorfer F, Redinger J (2016)
Publication Language: English
Publication Status: Published
Publication Type: Journal article
Publication year: 2016
Publisher: American Physical Society
Book Volume: 117
Article Number: 046101
Journal Issue: 4
DOI: 10.1103/PhysRevLett.117.046101
We report on the self-organized growth of monatomic transition-metal oxide chains of (3×1) periodicity and unusual MO2 stoichiometry (M=Ni, Co, Fe, Mn) on Ir(100). We analyze their structural and magnetic properties by means of quantitative LEED, STM, and density functional theory (DFT) calculations. LEED analyses reveal a fascinating common atomic structure in which the transition-metal atoms sit above a missing-row structure of the surface and are coupled to the substrate only via oxygen atoms. This structure is confirmed by DFT calculations with structural parameters deviating by less than 1.7 pm. The DFT calculations predict that the NiO2 chains are nonmagnetic, CoO2 chains are ferromagnetic, while FeO2 and MnO2 are antiferromagnetic. All structures show only weak magnetic interchain coupling. Further, we demonstrate the growth of oxide chains of binary alloys of Co and Ni or Fe on Ir(100), which allows us to produce well-controlled ensembles of ferromagnetic chains of different lengths separated by nonmagnetic or antiferromagnetic segments.
APA:
Ferstl, P., Hammer, L., Sobel, C., Gubo, M., Heinz, K., Schneider, M.A.,... Redinger, J. (2016). Self-Organized Growth, Structure, and Magnetism of Monatomic Transition-Metal Oxide Chains. Physical Review Letters, 117(4). https://doi.org/10.1103/PhysRevLett.117.046101
MLA:
Ferstl, Pascal, et al. "Self-Organized Growth, Structure, and Magnetism of Monatomic Transition-Metal Oxide Chains." Physical Review Letters 117.4 (2016).
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