A. Bollero

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Related Articles Magnetostatic interactions in various magnetosome clusters J. Appl. Phys. 113, 023907 (2013) On-chip measurements of Brownian relaxation vs. concentration of 40nm magnetic beads J. Appl. Phys. 112, 124512 (2012) Ferromagnetism, hysteresis and enhanced heat dissipation in assemblies of superparamagnetic nanoparticles J. Appl. Phys. 112,(More)
The effect of imprinting symmetric and displaced vortex structures into an antiferromagnetic material is investigated in micron-sized disks consisting of exchange coupled ferromagnetic-antiferromagnetic bilayers. The imprint of displaced vortices manifests itself by the occurrence of a new type of asymmetric hysteresis loops characterized by curved,(More)
in daily-life applications and are key components of numerous electronic, data and medical devices as well as of many applications in the automotive sector. The combination of properties of the R sublattice (4f) and the T sublattice (3d) led to the dramatic improvement in the energy density (BH)max of hard magnetic materials during the last two decades. In(More)
Fe3O4/SrTiO3(001):Nb grown by infrared pulsed laser deposition Matteo Monti, Mikel Sanz, Mohamed Oujja, Esther Rebollar, Marta Castillejo, Francisco J. Pedrosa, Alberto Bollero, Julio Camarero, Jose Luis F. Cu~ nado, Norbert M. Nemes, Federico J. Mompean, Mar Garcia-Hern andez, Shu Nie, Kevin F. McCarty, Alpha T. N’Diaye, Gong Chen, Andreas K. Schmid, Jos e(More)
Here, we report on a versatile full angular resolved/broad temperature range/vectorial magneto optical Kerr effect (MOKE) magnetometer, named TRISTAN. Its versatility relies on its capacity to probe temperature and angular dependencies of magnetization reversal processes without the need to do any intervention on the apparatus during measurements. The setup(More)
This study shows the possibility of tuning microstructure and magnetic properties of cobalt ferrite powders produced by co-precipitation and subsequently processed by ultra-fast milling. Short milling times (3 minutes) are sufficient to obtain high coercive isotropic powders for permanent magnet applications.
The Stoner-Wohlfarth (SW) model is the simplest model that describes adequately the magnetization reversal of nanoscale systems that are small enough to contain single magnetic domains. However for larger sizes where multi-domain effects are present, e.g., in thin films, this simple macrospin approximation fails and the experimental critical curve, referred(More)
A vectorial magneto-optic Kerr effect (v-MOKE) setup with simultaneous and quantitative determination of the two in-plane magnetization components is described. The setup provides both polarization rotations and reflectivity changes at the same time for a given sample orientation with respect to a variable external magnetic field, as well as allowing full(More)
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