A5009635219- Magnetic Properties of Alloys
- Magnetic Properties and Applications
- Magnetic properties of thin films
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic and transport properties of perovskites and related materials
- Magnetic and Electromagnetic Effects
- Magnetic Field Sensors Techniques
- Shape Memory Alloy Transformations
- Mechanical and Optical Resonators
- Microfluidic and Bio-sensing Technologies
- Force Microscopy Techniques and Applications
- Advanced MEMS and NEMS Technologies
- Photonic and Optical Devices
- Magneto-Optical Properties and Applications
- Paleontology and Evolutionary Biology
- Magnetic Bearings and Levitation Dynamics
- Electrohydrodynamics and Fluid Dynamics
- Nuclear Engineering Thermal-Hydraulics
- Microfluidic and Capillary Electrophoresis Applications
- Electrowetting and Microfluidic Technologies
- Nuclear reactor physics and engineering
- Thermodynamic and Structural Properties of Metals and Alloys
- Atomic and Subatomic Physics Research
- Adhesion, Friction, and Surface Interactions
- Electrospun Nanofibers in Biomedical Applications
Imperial College London
2015-2018
Institut Néel
2009-2016
Université Grenoble Alpes
2010-2016
Centre National de la Recherche Scientifique
2010-2016
Laboratoire de Génie Électrique de Grenoble
2008-2016
Kiel University
2016
Fachhochschule Kiel
2012-2016
Université Joseph Fourier
2010
Nizhny Novgorod State Pedagogical University
2010
Nizhny Novgorod State Technical University
2010
Thermomagnetic patterning (TMP) of 4 μm thick high performance NdFeB hard magnetic films deposited on Si substrates has been achieved using single pulsed laser irradiation. Uniaxially magnetised chessboard and stripe patterns with lateral feature sizes in the range 50–100 were produced. The depth reversal was estimated, both global (vibrating sample magnetometry) localized (scanning Hall probe) measurements, to be 1.1–1.2 μm. A simple model provides semiquantitative agreement experimental...
Scanning Hall probe microscopy has been used for the quantitative measurement of z-component (out-of-plane) stray magnetic fields produced by Nd–Fe–B hard films patterned at micron scale using both topographic and thermomagnetic methods. Peak-to-peak field values in range 20–120 mT have measured scan heights 25–30 μm above samples. Quantitative comparison between calculated profiles gives nondestructive access to micromagnets’ internal structure. In case topographically average value...
We report here on the fabrication of hard magnetic powder based micro-flux sources using micro-patterned films as templates or master structures. The micro-magnetic imprinting (μMI) process is simple and constituent materials final structures, commercial powders polymer, are inexpensive. structures may be transparent, either flexible rigid, depending choice polymer matrix used. peak-to-peak intensity z-component stray field measured above a test μMI structure made with spherical NdFeB...
Recent developments in the observation of magnetic domains and domain walls by wide-field optical microscopy based on magneto-optical Kerr, Faraday, Voigt, Gradient effect are reviewed. Emphasis is given to existence higher order effects for advanced imaging. Fundamental concepts advances methodology discussed that allow imaging various length time scales. Time-resolved electric field induced wall rotation shown. Visualization magnetization dynamics down picosecond temporal resolution...
Abstract Time‐resolved metallographic optical microscopy techniques are used together with magnetic domain imaging to clarify the interaction between domains and twin boundary (TB) motion in shape memory NiMnGa single crystals. The field stress induced formation is imaged by a magneto‐optical indicator film technique. Reversible TB visualized up high actuation speeds. From observation at adjacent crystal surfaces fundamental volume processes during strain motions derived. For structural...
A new method of imaging temperature distributions is presented. The based on the use a BiLu2 Fe4 GaO12 ferrimagnetic garnet layer as pyro-magneto-optical detection layer. Thermal with high sensitivity, micrometer spatial and millisecond temporal resolution demonstrated in contactless read-out scheme.
Magneto-optical imaging films (MOIFs) were used for the study of magnetic stray field distributions above topographically and thermomagnetically patterned permanent magnet other miniature elements that could be in micro-systems. Calibrated external bias fields applied to samples situ simplify graduation procedure, expand measurement range minimize errors. Both uniaxial planar MOIF make quantitative measurements. A scheme fast reconstruction serial sections non-uniform profiles is proposed....
Micromagnets have been reported to successfully levitate picoliter water droplets in air. Manipulation of levitating is a contamination-free alternative digital-microfluidic labs-on-chip where are handled channels or on substrate. An integrated electromagnetic hybrid device combining dielectrophoretic (DEP) forces control the position along magnetic groove, proposed. Diamagnetic analytically computed with CADES while Comsol Multiphysics™ (FEM) used for DEP forces. Approximations `point...
Ferrimagnetic GdCo5−xCux alloys exhibiting the effect of Gd- and 3d-sublattice magnetization compensations at defined temperatures were studied with respect to their use as thermoreversible permanent magnets (PMs). Coercive fields μ0Hc in range 0.3–1.6T measured for annealed single crystals x=1–2.2 having compensation points vicinity room temperature. Two applications such a PM, namely, thermally controlled actuator contactless temperature sensor, are demonstrated.
Adequate design engineering and maintenance of circuits with fast neutron reactors cooled lead lead-bismuth coolants require considering the peculiarities hydrodynamics these coolant flows. It is traditionally reputed that hydrodynamic characteristics heavy liquid-metal melts are analogous to water primary sodium, which practically valid for conditions part equipment channels a reactor circuit. The main compared affect flow characteristics, are: - unwettability oxide protective coatings by...
We demonstrate a six-axis scanning imaging apparatus using piezo bending actuators with large scan range. The six axes of motion the together coupling mechanism to translation stage allow complete control sensor position and orientation over surface, which is ideal for use planar sensors such as Hall devices. In particular, design allows in situ correction probe tilt angle so that distance sample surface can be minimized. investigate impact this alignment on quality measured data an InSb...
Thermal imaging using magnetic films is demonstrated by M. Kustov, J. McCord, and co-workers on page 5017. Using specially designed ferrimagnetic garnet layers, the slightest temperature changes are imaged magneto-optical microscopy. The introduced pyro-magneto-optical scheme offers new opportunities for various thermal-imaging applications. technique high sensitivity over a large range, as well spatial temporal resolution.