Effects of Transverse Magnetic Anisotropy on Current-Induced Spin Switching

Abstract

Spin-polarized transport through bistable magnetic adatoms or single-molecule magnets (SMMs), which exhibit both uniaxial and transverse magnetic anisotropy, is considered theoretically. The main focus is on the impact of transverse anisotropy on transport characteristics and the adatom's/SMM's spin. In particular, we analyze the role of quantum tunneling of magnetization (QTM) in the mechanism of the current-induced spin switching, and show that the QTM phenomenon becomes revealed as resonant peaks in the average values of the molecule's spin and in the charge current. These features appear at some resonant fields and are observable when at least one of the electrodes is ferromagnetic. We also show that the conductance generally depends on the relative orientation of the average adatom's/SMM's spin and electrode's magnetic moment. This spin-valve like magnetoresistance effect can be used to control spin switching of the adatom's/SMM's spin.

5 pages, 3 figures (submitted)

References in corpus (9)

• Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
• Electric Field Controlled Magnetic Anisotropy in a Single Molecule
• Berry Phase Oscillations of the Kondo Effect in Single-Molecule Magnets
• Spin Inelastic Electron Tunneling Spectroscopy on Local Spin Adsorbed on Surface
• Spin effects in transport through single-molecule magnets in the sequential and cotunneling regimes
• Berry-phase blockade in single-molecule magnets
• Kondo effect in single-molecule magnet transistors
• Transport through quantum-dot spin valves containing magnetic impurities
• Current-induced switching in transport through anisotropic magnetic molecules

Cited by in corpus (11)

• Probing Transverse Magnetic Anisotropy by Electronic Transport through a Single-Molecule Magnet
• Electron-vibron coupling effects on electron transport via a single-molecule magnet
• Transverse anisotropy effects on spin-resolved transport through large-spin molecules
• Quantum turnstile operation of single-molecule magnets
• Manipulation and readout of spin states of a single-molecule magnet by a spin-polarized current
• Intrinsic life-time and external manipulation of Neel states in antiferromagnetic adatom spins on semiconductor surfaces
• Tunnel magnetoresistance of a supramolecular spin valve
• Time-dependent spintronic anisotropy in magnetic molecules
• Spin transport through a nanojunction with a precessing anisotropic molecular spin: Quantum interference and spin-transfer torque
• Negative differential conductance and super-Poissonian shot noise in single-molecule magnet junctions
• Magnetoelectric effect in the mixed valence polyoxovanadate cage V${}_{12}$