Tailoring exchange interactions in engineered nanostructures: Ab initio study

Abstract

We present a novel approach to spin manipulation in atomic-scale nanostructures. Our ab initio calculations clearly demonstrate that it is possible to tune magnetic properties of sub-nanometer structures by adjusting the geometry of the system. By the example of two surface-based systems we demonstrate that (i) the magnetic moment of a single adatom coupled to a buried magnetic Co layer can be stabilized in either a ferromagnetic or an antiferromagnetic configuration depending on the spacer thickness. It is found that a buried Co layer has a profound effect on the exchange interaction between two magnetic impurities on the surface. (ii) The exchange interaction between magnetic adatoms can be manipulated by introducing artificial nonmagnetic Cu chains to link them.

4 pages, submitted to PRL

References in corpus (2)

• Exchange interaction between single magnetic adatoms
• Ab initio study of mirages and magnetic interactions in quantum corrals

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• Effects of Interatomic Coupling on Magnetic Anisotropy and Order of Spins on Metallic Surfaces
• Selective generation and amplification of RKKY interactions by P-N interface
• Direct surface charging and alkali-metal doping for tuning the interlayer magnetic order in planar nanostructures
• Quantum Spin Holography with Surface State Electrons
• Confined bulk states as a long-range sensor for impurities and a transfer channel for quantum information
• Perturbative approach to quantum tunneling and quantum interferences in spin clusters