Listar por autor UPNA "López Ortega, Alberto"
Mostrando ítems 1-9 de 9
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Core-shell magnetic nanoparticles
This Special Issue offers readers a compilation of cutting-edge research regarding the synthesis, development, and characterization of core-shell magnetic architectures, covering a wide spectrum of nanomaterials and serving ... -
Crossover from individual to collective magnetism in dense nanoparticle systems: local anisotropy versus dipolar interactions
Dense systems of magnetic nanoparticles may exhibit dipolar collective behavior. However, two fundamental questions remain unsolved: i) whether the transition temperature may be affected by the particle anisotropy or ... -
Direct evidence of a graded magnetic interface in bimagnetic core/shell nanoparticles using electron magnetic circular dichroism (EMCD)
Interfaces play a crucial role in composite magnetic materials and particularly in bimagnetic core/shell nanoparticles. However, resolving the microscopic magnetic structure of these nanoparticles is rather complex. Here, ... -
Elucidating individual magnetic contributions in bi-magnetic Fe3O4/Mn3O4 Core/Shell nanoparticles by polarized powder neutron diffraction
Heterogeneous bi-magnetic nanostructured systems have had a sustained interest during the last decades owing to their unique magnetic properties and the wide range of derived potential applications. However, elucidating ... -
Hardening of cobalt ferrite nanoparticles by local crystal strain release: implications for rare earth free magnets
In this work, we demonstrate that the reduction of the local internal stress by a low-temperature solvent-mediated thermal treatment is an effective post-treatment tool for magnetic hardening of chemically synthesized ... -
Magnetic binary encoding system based on 3D printing and GMI detection prototype
In this work, the feasibility of a magnetic binary encoding system using 3D printing technology is analyzed. The study has a double interest, that is, the possibility of printing a 3D piece that contains the codified ... -
Magnetically activated 3D printable polylactic acid/polycaprolactone/magnetite composites for magnetic induction heating generation
Additive manufacturing technology has attracted the attention of industrial and technological sectors due to the versatility of the design and the easy manufacture of structural and functional elements based on composite ... -
Nanoparticle size distribution and surface effects on the thermal dependence of magnetic anisotropy
Standard approaches to investigate the anisotropy of nanoparticle assemblies are either by means of zero-field-cooled-field-cooled DC magnetization curves or by analyzing the coercivity at low temperatures. However, these ... -
Non-linear GMI decoding in 3D printed magnetic encoded systems
The nonlinear giant magnetoimpedance (GMI) effect was explored as a highly sensitive sensing technology in 3D-printed magnetic encoded systems. Magnetic nanoparticles with low (magnetite, Fe3O4) and high (Co ferrite, ...