Accumulative magnetic switching of ultra-high-density recording media by circularly polarized light

Abstract

Manipulation of the magnetization by external energies other than magnetic field, such as spin-polarized current1-4, electric voltage5,6 and circularly polarized light7-11 gives a paradigm shift in magnetic nanodevices. Magnetization control of ferromagnetic materials only by circularly polarized light has received increasing attention both as a fundamental probe of the interactions of light and magnetism but also for future high-density magnetic recording technologies. Here we show that for granular FePt films, designed for ultrahigh-density recording, the optical magnetic switching by circularly polarized light is an accumulative effect from multiple optical pulses. We further show that deterministic switching of high anisotropy materials by the combination of circularly polarized light and modest external magnetic fields, thus revealing a pathway towards technological implementation.

arXiv comment16 pages, 3 figures + supplementary information

References in corpus (4)

• All-optical control of ferromagnetic thin films and nanostructures
• Light-induced magnetization reversal of high-anisotropy TbCo alloy films
• Model for multi-shot all-thermal all-optical switching in ferromagnets
• All-optical switching in granular ferromagnets caused by magnetic circular dichroism

Cited by in corpus (21)

• The Ultrafast Einstein-De Haas Effect
• Helicity-dependent all-optical domain wall motion in ferromagnetic thin films
• Single shot ultrafast all optical magnetization switching of ferromagnetic Co/Pt multilayers
• Single shot all optical switching of intrinsic micron size magnetic domains of a Pt/Co/Pt ferromagnetic stack
• Spintronic thermal management
• Efficient all-optical helicity dependent switching of spins in a Pt/Co/Pt film by a dual-pulse excitation
• Magnetic switching in granular FePt layers promoted by near-field laser enhancement
• Plasmon-induced demagnetization and magnetic switching in nickel nanoparticle arrays
• Ultrafast demagnetization in ferromagnetic materials: Origins and progress
• Thermal Fluctuations In The Landau-Lifshitz-Bloch Model
• Interface-induced field-like optical spin torque in a ferromagnet/heavy metal heterostructure
• Heat accumulation and all-optical switching by domain wall motion in Co/Pd superlattices
• Heat diffusion in magnetic superlattices on glass substrates
• Magnetization reversal of a ferromagnetic Pt/Co/Pt film by helicity dependent absorption of visible to near-infrared laser pulses
• Light-induced torque in ferromagnetic metals via orbital angular momentum generated by photon-helicity
• Direct imprinting of arbitrary spin textures using programmable structured light in a semiconductor two-dimensional electron gas
• Off-resonant all-optical switching dynamics in a ferromagnetic model system
• Demagnetizing fields in all-optical switching
• Effective reduction of the coercivity for Co${}_{72}$Pt${}_{28}$ thin film by exchange coupled Co${}_{81}$Ir${}_{19}$ soft layer with negative magnetocrystalline anisotropy
• Exploring the impact of the inverse Faraday effect on all-optical helicity-dependent magnetization switching
• Influence of magnetic domain walls on all-optical magnetic toggle switching in a ferrimagnetic GdFe film