Adrián Quesada
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View article: High-temperature oxygen-assisted molecular beam epitaxy of BaWO <sub>4</sub> on W(110): growth mechanism and structural characterization
High-temperature oxygen-assisted molecular beam epitaxy of BaWO <sub>4</sub> on W(110): growth mechanism and structural characterization Open
Growth of barium tungstate nanostructures by MBE, depositing only Ba on W(110) in an oxygen atmosphere. The tungsten atoms are incorporated into the structure through the interaction between the substrate and the oxygen at high temperature.
View article: A Rapid Consolidation Route for Recycled NdFeB Powders and the Role of Particle Shape in Grain Growth
A Rapid Consolidation Route for Recycled NdFeB Powders and the Role of Particle Shape in Grain Growth Open
The recycling of NdFeB magnets is essential to reduce reliance on critical rare earth elements and mitigate the environmental burden of virgin magnet production. Hydrogen Processing of Magnetic Scrap (HPMS) offers an efficient method to ex…
View article: A simple and industrially scalable process for recycling hexaferrite ceramic magnets
A simple and industrially scalable process for recycling hexaferrite ceramic magnets Open
The demand for hexaferrite (BaFe12O19/SrFe12O19) permanent magnets is expected to rise in the next 5–10 years due to their potential as a sustainable alternative to rare-earth magnets. Currently, less than 1 % of recycling of permanent mag…
View article: Concomitant Light-Reversible Magnetic Response in Multiferroic Oxide Heterostructures for Multiphysics Applications
Concomitant Light-Reversible Magnetic Response in Multiferroic Oxide Heterostructures for Multiphysics Applications Open
The concept of multiphysics, where materials respond to diverse external stimuli, such as magnetic fields, electric fields, light irradiation, stress, heat, and chemical reactions, plays a fundamental role in the development of innovative …
View article: Remanence Increase in SrFe12O19/Fe Exchange-Decoupled Hard-Soft Composite Magnets Owing to Dipolar Interactions
Remanence Increase in SrFe12O19/Fe Exchange-Decoupled Hard-Soft Composite Magnets Owing to Dipolar Interactions Open
In the search for improved permanent magnets, fueled by the geostrategic and environmental issues associated with rare-earth-based magnets, magnetically hard (high anisotropy)-soft (high magnetization) composite magnets hold promise as alt…
View article: Size Effects in the Verwey Transition of Nanometer-Thick Micrometer-Wide Magnetite Crystals
Size Effects in the Verwey Transition of Nanometer-Thick Micrometer-Wide Magnetite Crystals Open
We have monitored the Verwey transition in micrometer-wide, nanometer-thick\nmagnetite islands on epitaxial Ru films on Al2O3(0001) using Raman\nspectroscopy. The islands have been grown by high-temperature oxygen-assisted\nmolecular beam …
View article: Magnetic domain wall pinning in cobalt ferrite microstructures
Magnetic domain wall pinning in cobalt ferrite microstructures Open
A detailed correlative structural, magnetic and chemical analysis of non-stoichiometric cobalt ferrite micrometric crystals was performed by x-ray magnetic circular dichroism combined with photoemission microscopy, low energy electron micr…
View article: Size effects in the Verwey transition of nanometer-thick micron-wide magnetite crystals
Size effects in the Verwey transition of nanometer-thick micron-wide magnetite crystals Open
We have monitored the Verwey transition in micrometer-wide, nanometer-thick magnetite islands on epitaxial Ru films on Al2O3(0001) using Raman spectroscopy. The islands have been grown by high-temperature oxygen-assisted molecular beam epi…
View article: Effect of organic solvent on the cold sintering processing of SrFe12O19 platelet-based permanent magnets
Effect of organic solvent on the cold sintering processing of SrFe12O19 platelet-based permanent magnets Open
[EN] In this work we have investigated the effect of the solvent during the processing of SrFeO platelet-based permanent magnets by cold sintering process (CSP) plus a post-thermal treatment. Several organic solvents: glacial acetic acid, …
View article: Hexaferrite-based permanent magnets with upper magnetic properties by cold sintering process via a non-aqueous solvent
Hexaferrite-based permanent magnets with upper magnetic properties by cold sintering process via a non-aqueous solvent Open
The incessant technological pursuit towards a more sustainable and green\nfuture depends strongly on permanent magnets. At present, their use is\nwidespread, making it imperative to develop new processing methods that\ngenerate highly comp…
View article: Scaling Up the Production of Electrodeposited Nanowires: A Roadmap towards Applications
Scaling Up the Production of Electrodeposited Nanowires: A Roadmap towards Applications Open
The use of metallic nanowires is mostly reduced to scientific areas where a small quantity of nanostructures are needed. In order to broaden the applicability of these nanomaterials, it is necessary to establish novel synthesis protocols t…
View article: Non-monotonic magnetic anisotropy behavior as a function of adsorbate coverage in Fe ultrathin films near the spin reorientation transition
Non-monotonic magnetic anisotropy behavior as a function of adsorbate coverage in Fe ultrathin films near the spin reorientation transition Open
Carbon monoxide (CO) adsorption on ultrathin fcc Fe films is known to result in the rotation of magnetization from out-of-plane to in-plane.
View article: Topical Review: Progress and Prospects of Hard Hexaferrites for Permanent Magnet Applications
Topical Review: Progress and Prospects of Hard Hexaferrites for Permanent Magnet Applications Open
Permanent magnets based on hard hexaferrite represent the largest family of magnets being used today by volume. They generate moderate remanence induction, but present crucial advantages in terms of availability, cost, resistance to demagn…
View article: FeCo Nanowire–Strontium Ferrite Powder Composites for Permanent Magnets with High-Energy Products
FeCo Nanowire–Strontium Ferrite Powder Composites for Permanent Magnets with High-Energy Products Open
Due to the issues associated with rare-earth elements, there arises a strong need for magnets with properties between those of ferrites and rare-earth magnets that could substitute the latter in selected applications. Here, we produce a hi…
View article: A real-time XAS PEEM study of the growth of cobalt iron oxide on Ru(0001)
A real-time XAS PEEM study of the growth of cobalt iron oxide on Ru(0001) Open
The growth of mixed cobalt-iron oxides on Ru(0001) by high-temperature oxygen-assisted molecular beam epitaxy has been monitored in real time and real space by x-ray absorption photoemission microscopy. The initial composition is a mixed F…
View article: Expanding the tunability and applicability of exchange-coupled/decoupled magnetic nanocomposites
Expanding the tunability and applicability of exchange-coupled/decoupled magnetic nanocomposites Open
CoFe2O4/Co–Fe magnetic composites and the importance of avoiding impurity phases that hinder an effective exchange-coupling between the magnetic phases.