A5075624846- Metallic Glasses and Amorphous Alloys
- Magnetic Properties and Applications
- Magnetic properties of thin films
- Magnetic Properties of Alloys
- Surface Roughness and Optical Measurements
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic Field Sensors Techniques
- Theoretical and Computational Physics
- Magneto-Optical Properties and Applications
- Nanoparticle-Based Drug Delivery
- Microstructure and Mechanical Properties of Steels
- Sensor Technology and Measurement Systems
- Non-Destructive Testing Techniques
- Anodic Oxide Films and Nanostructures
- Electromagnetic wave absorption materials
- Adsorption and biosorption for pollutant removal
- Thin-Film Transistor Technologies
- Metallurgical and Alloy Processes
- Rare-earth and actinide compounds
- Glass properties and applications
- Electrical and Thermal Properties of Materials
- Phase-change materials and chalcogenides
- Electromagnetic Effects on Materials
- Electrodeposition and Electroless Coatings
- Advanced Sensor and Energy Harvesting Materials
National Institute of Research and Development for Technical Physics
2015-2024
Alexandru Ioan Cuza University
2010-2021
National Institute of Standards
2014
National Institute of Standards and Technology
2014
"Ion Ionescu de la Brad" Iasi University of Life Sciences
2014
Colorado State University
2014
University of Alabama
2014
NTL Institute for Applied Behavioral Science
1998-2013
University of Salford
2008
Institut Laue-Langevin
2008
During the preparation process of glass-covered magnetic amorphous wires, axial, radial, and azimuthal internal stresses are induced, determining their properties. We have proposed a calculation method induced during solidification metal cooling from temperature to room due difference between thermal expansion coefficients glass. For ${\mathrm{Fe}}_{77.5}$${\mathrm{Si}}_{7.5}$${\mathrm{B}}_{15}$ wires we found about ${10}^{9}$ Pa. The values distribution these depend on radius thickness...
Abstract Recognizing the importance of magnetic thin wires for science and technology, 6th International Workshop on Magnetic Wires was held 6–7 July 2010, in Bodrum, Turkey. A wide range topics were addressed from technological problems micro‐ nanowire fabrication, to advanced physical effects novel applications. Furthermore, critical discussions present state knowledge future trends arose during Panel Session microwires. In report, main aspects at Discussion workshop presentations are...
The surface magnetization processes taking place in simple permalloy (Py) and FeGa nanowires, Py/Cu, CoFeB/Cu, CoNiP/Cu, FeGa/Py, FeGa/CoFeB multilayered nanowires have been studied by magneto-optical Kerr effect (MOKE) magnetometry. results indicate a strong correlation between the direction of anisotropy axis relative to applied field plane incidence laser spot, as well dipolar interactions or ferromagnetic layers on reversal. larger spots are inducing more noise MOKE hysteresis loops...
The magnetic characteristics of FINEMET type glass-coated nanowires and submicron wires are investigated by taking into account the structural evolution induced specific annealing all way from a fully amorphous state to nanocrystalline structure. differences between properties these ultrathin those thicker microwires “conventional” with similar structures have been emphasized explained phenomenologically. domain wall propagation in novel wires, featuring combination an crystalline structure,...
The initial characteristics of Romanian fly ash from the CET II Holboca power plant show feasibility its application for production a new material with applicability in environmental decontamination. obtained was characterized using standard techniques: scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), instrumental neutron activation (INAA), diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET) surface area, and...
Results on the preparation and magnetic characterization of rapidly solidified amorphous glass-coated nanowires are reported. Rapidly have been investigated by means bulk surface hysteresis loop measurements, scanning electron microscopy, ferromagnetic resonance. Domain wall velocity has measured to demonstrate suitability new for spintronic applications. Changes in composition, thickness glass coating, nanowire dimensions allow extensive tailoring domain mobility.
The electrodeposition of NiFe nanowires-with the length ∼3.0 μm and diameter 200 nm-using porous anodized aluminum oxide (AAO) templates on sputtered Au-back electrode (300 nm) using sulfate/chloride electrolyte solution potential pulsed deposition. area Au-AAO template, determined by reversible one-electron transfer oxidation K4Fe(CN)6, used as a probe in CV, was found to be ∼2.4 times larger than Au-thin film electrode. anomalous codeposition phenomenon known "volcano" type curve-with...
Results on the magnetic behavior of glass-coated amorphous wires with metallic nucleus diameters in submicron range are reported for first time. The nearly zero magnetostrictive is different from that observed microwires typical dimensions and similar composition. Submicron bistable, whereas show an almost anhysteretic loop. Bistability maintained even a very thin surface layer, which was shown to display helical anisotropy. origin this specific shape anisotropy becomes dominant at lower...
The effectiveness of a Fe3O4-loaded fly ash composite for the adsorption Congo red dye was assessed in this work. structure and properties magnetic adsorbent were established by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffractometer (XRD), vibrating sample magnetometer (VSM), dynamic light scattering (DLS). results showed saturation magnetization value 6.51 emu/g superparamagnetic behavior. main parameters that influence removal such as dose, initial...
We investigate the evolution of magneto-impedance (MI) response Fe73.5Cu1Nb3Si13.5B9 glass-covered wires with annealing temperature, starting from as-cast amorphous state up to 600 °C. As-cast FeCuNbSiB display a MI ratio about 1%, this value increasing temperature 5% for 550 °C when nanocrystalline phase appears. For which have had glass removed, increases 28% after appearance phase. The is larger than that found in CoFeSiB removal. Annealing over leads decrease both samples and coating...
The influence of annealing parameters (time ta, current Ia, and applied stress σa) on magnetic properties Joule heated amorphous Co68.15Fe4.35Si12.5B15 glass covered microwire (13 μm) was investigated. Annealing under induces additional anisotropy which is proportional to σa can be removed by subsequent heating without stress. magnetoimpedance, measured the sample with lowest field (HK≈120 Am−1), shows sharp maxima at H=±HK. For driving currents higher than 0.2 mA nonlinear behavior...