A5016217211- Magnetic properties of thin films
- Magnetic Properties of Alloys
- Magnetic Properties and Applications
- Magnetic Properties and Synthesis of Ferrites
- Magnetic and transport properties of perovskites and related materials
- Metallic Glasses and Amorphous Alloys
- Rare-earth and actinide compounds
- Characterization and Applications of Magnetic Nanoparticles
- Theoretical and Computational Physics
- Multiferroics and related materials
- Chalcogenide Semiconductor Thin Films
- Physics of Superconductivity and Magnetism
- Hydrogen Storage and Materials
- Additive Manufacturing and 3D Printing Technologies
- Magneto-Optical Properties and Applications
- Iron oxide chemistry and applications
- Quantum Dots Synthesis And Properties
- Copper-based nanomaterials and applications
- Metallurgical and Alloy Processes
- ZnO doping and properties
- Semiconductor materials and interfaces
- Electronic and Structural Properties of Oxides
- Shape Memory Alloy Transformations
- Electrodeposition and Electroless Coatings
- Advanced Machining and Optimization Techniques
IMDEA Nanoscience
2016-2025
Madrid Institute for Advanced Studies
2014-2024
Universidad Autónoma de Madrid
2011-2022
Instituto de Ciencia de Materiales de Madrid
2018-2019
Institute for Energy Technology
2016
Universidad Complutense de Madrid
2009-2013
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2008-2013
Instituto Tecnológico y de Energías Renovables
2013
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2006-2009
Spintronique et Technologie des Composants
2006-2009
A MnBi alloy containing over 90 wt % low-temperature phase (LTP) has been obtained by high-temperature sintering and magnetic purification. The coercivity of the bonded magnet increases with increasing temperatures. 2.0 T achieved at 400 K. maximum energy product (BH)max is 7.7 MGOe (61 kJ/m3) 4.6 (37 room temperature K, respectively. Neutron diffraction data reveal a spin reorientation, which gives rise to low anisotropy fields lower temperatures for LTP alloy.
Searching for high-performance permanent magnets components with no limitation in shape and dimensions is highly desired to overcome the present design manufacturing restrictions, which affect efficiency of final devices energy, automotive aerospace sectors. Advanced 3D-printing composite materials related technologies an incipient route achieve functional structures avoiding limitations traditional manufacturing. Gas-atomized MnAlC particles combined polymer have been used this work...
Advanced manufacturing techniques using composite materials made of magnetic particles and polymers are attracting much interest for new routes fabrication more efficient functional devices with complex shapes. The 3D printing bonding technologies a broad range materials, such as NdFeB, improved ferrites, Mn-based alloys, show up alternatives to traditional large permanent magnets' (PMs) applications. This paper focuses on the products based strontium ferrite NdFeB by extrusion...
Interfacial exchange coupling is known to improve the permanent magnetic performance (i.e., maximal energy product) in composites of magnetically hard and soft particles. The prevailing strategy, employed a plethora compositions, consists maximizing between phases optimizing material parameters such as particle size or phase composition. In CoFe 2 O 4 –FeCo nanocomposites, it experimentally shown that interparticle uncoupling combination with sizes grains below single‐domain threshold leads...
This paper presents a method of integrating thick permanent magnetic films into microfabrication process. An enhanced binding consisting hybrid Parylene N and C thin was used in conjunction with various types NdFeB powders to create embedded magnet films. A systematic study composite developed using three different order control intrinsic coercivities (H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ci</sub> ) remanence (B...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation F. J. Teran, C. Casado, N. Mikuszeit, G. Salas, A. Bollero, M. P. Morales, Camarero, R. Miranda; Accurate determination of the specific absorption rate in superparamagnetic nanoparticles under non-adiabatic conditions. Appl. Phys. Lett. 6 August 2012; 101 (6): 062413. https://doi.org/10.1063/1.4742918 Download...
The Fe 65 Co 35 alloy is a well‐known Fe‐based soft ferromagnetic with excellent magnetic properties, which make it strong candidate to be used in technological applications. In the present work, synthesizing nanoscrystalline by mechanical alloying focused on, adding cyclohexane (C 6 H 12 ) acting as process control agent (PCA). PCAs are effective favoring nanostructured alloys uniform grain size. production of this type promising approach tune hardness . Structural, thermal, morphological,...
A simple method was developed for magnetic hardening melt-spun Sm(Co,Fe,Cu,Zr)z alloys. The as-spun ribbons reached a coercivity of 2.8 T only by slow cooling from 850 to 400 °C, without the standard solid solution and isothermal aging treatments which are required bulk precipitation hardened 2:17 SmCo alloy. single 1:7 phase, identical that found in as-solubilized ribbons, obtained state. At same time, Cu Zr supersaturately dissolved matrix melt spinning due its very high rate. Thus,...
The interface between magnetite $({\mathrm{Fe}}_{3}{\mathrm{O}}_{4})$ and Nb-doped $\mathrm{Sr}\mathrm{Ti}{\mathrm{O}}_{3}$ shows typical characteristics of a Schottky barrier. magnetoresistance was found to depend on the bias current through junction. This can be understood within model for contact with ferromagnetic component. spin polarization layer determined about 60%.
We examine the magnetic easy-axis directions of stoichiometric magnetite films grown on SrTiO3:Nb by infrared pulsed-laser deposition. Spin-polarized low-energy electron microscopy reveals that individual domains are magnetized along in-plane ⟨100⟩ film directions. Magneto-optical Kerr effect measurements show maxima remanence and coercivity also This orientation differs from bulk prepared other techniques, establishing anisotropy can be tuned growth.
A vectorial magneto-optic Kerr effect (v-MOKE) setup with simultaneous and quantitative determination of the two in-plane magnetization components is described. The provides both polarization rotations reflectivity changes at same time for a given sample orientation respect to variable external magnetic field, as well allowing full angular studies. classical description based on Jones formalism used calculate setup's properties. use different incoming light polarizations and/or MOKE...
This study shows the possibility of dramatically tuning microstructure and magnetic properties gas-atomized Mn54Al46 particles by milling for an unprecedented duration 30 s. flash-milling procedure avoids high temperatures typically achieved in lengthy conventional ball experiments, is efficient to reduce crystallite size nanometer scale, induce microstructural strain ease phase transformations. leads creation τ-MnAl providing magnetization, β-Mn operating mechanism coercivity development....
We report on a comparative study of high performance isotropic cobalt ferrite (CoFe2O4) powder processed by dry and surfactant assisted (wet) ball milling. Milling times as short 1.5 min (dry) 6 have resulted in 4-fold increase coercivity, with maximum achieved value above 318 kA/m (4 kOe). The use is shown to be advantageous the formation more homogeneous structure constituted non-agglomerated strained nanoparticles. A record (BH) max 18.6 kJ m −3 (2.34 MGOe) has been obtained for after...
The effect of imprinting symmetric and displaced vortex structures into an antiferromagnetic material is investigated in micron-sized disks consisting exchange coupled ferromagnetic-antiferromagnetic bilayers. imprint vortices manifests itself by the occurrence a new type asymmetric hysteresis loops characterized curved, reversible, central sections with nonzero remanent magnetization. Such achieved cooling through blocking temperature system small fields. Micromagnetic simulations reveal...
Synthesis of nanocrystalline Co-ferrite powders with tunable magnetic properties is demonstrated by using co-precipitation and a novel ultrafast milling route.
The potential of magnetic nanoparticles for acting as efficient catalysts, imaging tracers or heating mediators relays on their superparamagnetic behaviour under alternating fields. In spite the relevance this phenomenon, identification specific fingerprints to unequivocally assign nanomaterials is still lacking. Herein, we report novel experimental and theoretical evidences related superparamagnetism observed in iron oxide nanoparticle suspensions at room temperature. AC magnetization...