Electronic and magnetic properties of 3$d$ transition-metal adatoms on Mn/W(110)

Abstract

Using density functional theory, we investigate the electronic and magnetic properties of $3d$ transition-metal adatoms adsorbed on a monolayer of Mn on W(110). Mn/W(110) has a noncollinear cycloidal spin-spiral ground state with an angle of 173${}^{\circ }$ between magnetic moments of adjacent Mn rows. It allows to rotate the spin orientation of an adsorbed magnetic adatom quasi-continuously. Therefore, this surface is ideally suited for manipulating the spin direction of individual atoms and exploring their magnetic properties using scanning tunneling microscopy (STM). The adsorbed V and Cr transition-metal adatoms couple antiferromagnetically to the nearest neighbor Mn atom of Mn monolayer while Mn, Fe, Co, and Ni couple ferromagnetically. The magnetic moments of the $3d$ adatoms are large and show a Hund's rule type of trend with a peak in the middle of the series. We find large spin splitting of the $3d$ transition-metal adatoms, large spin polarization of the local vacuum density of states up to 73\% at the Fermi energy, and significant tunneling anisotropic magnetoresistance enhancement up to 27\%. We conclude that such large values stem from the strong hybridization between the adatoms and the Mn atoms of the monolayer. Furthermore, identification of spin orientations of the adatom using spin-polarized STM is only possible for Co and V adatoms.

References in corpus (14)

• Current-driven dynamics of chiral ferromagnetic domain walls
• Tunneling Anisotropic Magnetoresistance: A spin-valve like tunnel magnetoresistance using a single magnetic layer
• Anisotropic tunneling magnetoresistance and tunneling anisotropic magnetoresistance: spin-orbit coupling in magnetic tunnel junctions
• Tunneling anisotropic magnetoresistance driven by resonant surface states: First-principles calculations of Fe(001) surface
• Giant Anisotropic Magneto-Resistance in ferromagnetic atomic contacts
• Anisotropic magnetoresistance and anisotropic tunneling magnetoresistance due to quantum interference in ferromagnetic metal break junctions
• Prospect for room temperature tunneling anisotropic magnetoresistance effect: density of states anisotropies in CoPt systems
• Changing the Magnetic Configurations of Nanoclusters Atom-by-Atom
• Sensing Noncollinear Magnetism at the Atomic Scale Combining Magnetic Exchange and Spin-Polarized Imaging
• Quantifying Exchange Forces of a Non-Collinear Magnetic Structure on the Atomic Scale
• Large Tunneling Anisotropic Magnetoresistance mediated by Surface States
• Tunnelling anisotropic magnetoresistance effect of single adatoms on a noncollinear magnetic surface
• Noncollinear spin density of an adatom on a magnetic surface
• Tunneling anisotropic magnetoresistance of Pb and Bi adatoms and dimers on Mn/W(110): A first-principles study

Cited by in corpus (1)

• Spin-spiral state of a Mn monolayer on W(110) studied by soft x-ray absorption spectroscopy at variable temperatures