0000000000918712

AUTHOR

A. Kuksov

showing 4 related works from this author

Time-resolved photoemission electron microscopy of magnetic field and magnetisation changes

2003

Owing to its parallel image acquisition, photoemission electron microscopy is well suited for real-time observation of fast processes on surfaces. Pulsed excitation sources like synchrotron radiation or lasers, fast electric pulsers for the study of magnetic switching, and/or time-resolved detection can be utilised. A standard approach also being used in light optical imaging is stroboscopic illumination of a periodic (or quasi-periodic) process. Using this technique, the time dependence of the magnetic field in a pulsed microstrip line has been imaged in real time exploiting Lorentz-type contrast. Similarly, the corresponding field-induced changes in the magnetisation of cobalt microstruct…

Physicsbusiness.industrySynchrotron radiationGeneral ChemistryLaserMicrostructureMicrostriplaw.inventionMagnetic fieldMagnetizationPhotoemission electron microscopyOpticslawGeneral Materials SciencebusinessExcitationApplied Physics A: Materials Science & Processing
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Magnetization changes visualized using photoemission electron microscopy

2004

Abstract Photoemission electron microscopy was used to visualize the motion of magnetic domains on a sub-nanosecond timescale. The technique exploits the imaging of magnetic domains using soft X-ray circular dichroism, with the special feature that the instrument utilizes a fast image acquisition system with intrinsic 125 ps time resolution. The overall time resolution used is about 500 ps. Different domains and domain movements have been observed in lithographically-produced Permalloy structures on a copper microstrip-line. A current pulse of I=0.5 A with rise times of about 300 ps switched the Permalloy islands from a Landau-Lifshitz type domain configuration into metastable s-state domai…

PhysicsPermalloyMagnetization dynamicsRadiationCondensed matter physicsMagnetic domainMagnetismResolution (electron density)Condensed Matter PhysicsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsMagnetizationPhotoemission electron microscopyNuclear magnetic resonanceMicroscopyPhysical and Theoretical ChemistrySpectroscopyJournal of Electron Spectroscopy and Related Phenomena
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Time-resolved X-ray photoemission electron microscopy: imaging magnetodynamics on the 100 ps scale and below

2005

Abstract We present recent results of time-resolved X-ray photoemission electron microscopy (TR-XPEEM) investigations on magnetic systems. Our studies of microstructured permalloy particles employ a magnetic pump XPEEM probe approach. The stroboscopic experiments feature a time resolution of Δ τ ≤ 130  ps and yield magnetic domain images with a surprising richness of details. We observe a strong influence of incoherent magnetization rotation processes, which lead to complicated transient domain structures with a blocked relaxation behavior.

PermalloyMagnetization dynamicsRadiationMagnetic domainChemistryInverse photoemission spectroscopyAngle-resolved photoemission spectroscopyCondensed Matter PhysicsMolecular physicsAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialslaw.inventionMagnetizationPhotoemission electron microscopyNuclear magnetic resonancelawPhysical and Theoretical ChemistryElectron microscopeSpectroscopyJournal of Electron Spectroscopy and Related Phenomena
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Sub-nanosecond resolution x-ray magnetic circular dichroism photoemission electron microscopy of magnetization processes in a permalloy ring

2005

Fast magnetization processes in a microstructured permalloy ring with 80 µm o.d. and 30 nm thickness have been observed by photoemission electron microscopy exploiting x-ray magnetic circular dichroism as the magnetic contrast mechanism. As a high speed probe we employed synchrotron radiation pulses at the ESRF (Grenoble) operated in 16-bunch mode, yielding photon pulses of 105 ps FWHM with a period of 176 ns. Fast magnetic field pulses have been generated by means of current pulses through coplanar waveguides with the magnetic structure being lithographically prepared on their surface. A stroboscopic pump–probe set-up with a variable time delay between the field pulse and photon pulse allo…

PermalloyMagnetic domainbusiness.industryMagnetic circular dichroismChemistrySynchrotron radiationCondensed Matter PhysicsMagnetic fieldMagnetizationPhotoemission electron microscopyOpticsX-ray magnetic circular dichroismGeneral Materials ScienceAtomic physicsbusinessJournal of Physics: Condensed Matter
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