Fast Switching of Bistable Magnetic Nanowires Through Collective Spin Reversal

Abstract

The use of magnetic nanowires as memory units is made possible by the exponential divergence of the characteristic time for magnetization reversal at low temperature, but the slow relaxation makes the manipulation of the frozen magnetic states difficult. We suggest that finite-size segments can show a fast switching if collective reversal of the spins is taken into account. This mechanism gives rise at low temperatures to a scaling law for the dynamic susceptibility that has been experimentally observed for the dilute molecular chain Co(hfac)2NitPhOMe. These results suggest a possible way of engineering nanowires for fast switching of the magnetization.

9 pages, 3 figures, 20 references

References in corpus (3)

• Evidence of spontaneous spin polarized transport in magnetic nanowires
• Finite-Size effects in "Single Chain Magnets": an experimental and theoretical study
• Magnetization reversal triggered by spin injection in magnetic nanowires

Cited by in corpus (5)

• Zero-Temperature Relaxation of Three-Dimensional Ising Ferromagnets
• Finite-size effects on the dynamic susceptibility of CoPhOMe single-chain molecular magnets in presence of a static magnetic field
• A combined first-principles and thermodynamic approach to M-Nitronyl Nitroxide (M=Co, Mn) spin helices
• Thermally activated magnetization reversal in monoatomic magnetic chains on surfaces studied by classical atomistic spin-dynamics simulations
• Tunable Finite-Sized Chains to Control Magnetic Relaxation