1.
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7 p, 1.1 MB |
Survival of skyrmions along granular racetracks at room temperature
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Castell-Queralt, Josep (Universitat Autònoma de Barcelona. Departament de Física) ;
Abad-López, Guillermo (Universitat Autònoma de Barcelona. Departament de Física) ;
González-Gómez, Leonardo (Universitat Autònoma de Barcelona. Departament de Física) ;
Del-Valle, Nuria (Universitat Autònoma de Barcelona. Departament de Física) ;
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física)
Skyrmions can be envisioned as bits of information that can be transported along nanoracetracks. However, temperature, defects, and/or granularity can produce diffusion, pinning, and, in general, modification in their dynamics. [...]
2023 - 10.1039/d3na00464c
Nanoscale advances, Vol. 5, Issue 18 (September 2023) , p. 4728-4734
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2.
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12 p, 7.5 MB |
Exploiting random phenomena in magnetic materials for data security, logics, and neuromorphic computing : Challenges and prospects
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Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física) ;
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Random phenomena are ubiquitous in magnetism. They include, for example: the random orientation of magnetization in an assembly of non-interacting isotropic magnets; arbitrary maze domain patterns in magnetic multilayers with out-of-plane anisotropy, random polarization, and chirality of an array of magnetic vortices; or Brownian skyrmion motion, among others. [...]
2021 - 10.1063/5.0055400
APL materials, Vol. 9, Issue 7 (July 2021) , art. 070903
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3.
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4.
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8 p, 5.7 MB |
A new reversal mode in exchange coupled antiferromagnetic/ferromagnetic disks : Distorted viscous vortex
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Gilbert, Dustin A. (University of California. Physics Department) ;
Ye, Li (University of California. Physics Department) ;
Varea Espelt, Aïda (Universitat de Barcelona) ;
Agramunt Puig, Sebastià (Universitat Autònoma de Barcelona. Departament de Física) ;
Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física) ;
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física) ;
López-Barbera, José Francisco (Universitat Autònoma de Barcelona. Departament de Física) ;
Buchanan, K. S. (Colorado State University. Department of Physics) ;
Hoffmann, Axel (Argonne National Laboratory) ;
Sánchez Moreno, Àlvar (Universitat Autònoma de Barcelona. Departament de Física) ;
Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ;
Liu, Kai (University of California. Physics Department) ;
Nogués, Josep (Institut Català de Nanociència i Nanotecnologia)
Magnetic vortices have generated intense interest in recent years due to their unique reversal mechanisms, fascinating topological properties, and exciting potential applications. In addition, the exchange coupling of magnetic vortices to antiferromagnets has also been shown to lead to a range of novel phenomena and functionalities. [...]
2015 - 10.1039/c5nr01856k
Nanoscale, Vol. 7, Issue 21 (June 2015) , p. 9878-9885
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5.
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9 p, 1.2 MB |
Magnetic vortex evolution in self-assembled La₀.₇Sr₀.₃MnO₃ nanoislands under in-plane magnetic field
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Zabaleta Llorens, Jone (Institut de Ciència de Materials de Barcelona) ;
Jaafar, Míriam (Instituto de Ciencia de Materiales de Madrid) ;
Asenjo, Agustina (Instituto de Ciencia de Materiales de Madrid) ;
Agramunt Puig, Sebastià (Universitat Autònoma de Barcelona) ;
Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física) ;
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física) ;
Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física) ;
Puig i Molina, Mª Teresa (Institut de Ciència de Materials de Barcelona) ;
Obradors, Xavier (Institut de Ciència de Materials de Barcelona) ;
Mestres i Andreu, Narcís (Institut de Ciència de Materials de Barcelona)
The magnetic vortex formation at room temperature and its evolution under in-plane magnetic field is studied in chemically grown self-assembled La₀. ₇Sr₀. ₃MnO₃ nanoislands of less than 200 nm in width. [...]
2014 - 10.1063/1.4891277
APL materials, Vol. 2, issue 7 (July 2014) , art. 076111
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8 p, 469.0 KB |
Transport critical-current density of superconducting films with hysteretic ferromagnetic dots
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Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física) ;
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física) ;
Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física) ;
Dinner, Rafael B. (University of Cambridge. Department of Materials Science and Metallurgy)
Superconductor-ferromagnet hybrids present a rich and complex phenomenology. Particularly, a hysteretic behavior on the transport critical-current density, as a function of a uniform perpendicular applied field, has been experimentally found in superconducting films with some embedded ferromagnets. [...]
2012 - 10.1063/1.4732314
AIP advances, Vol. 2, Núm. 2 (June 2012) , art. 22166
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9 p, 718.2 KB |
A quasistatic magnetic cloak
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Souc, Ján (Slovak Academy of Sciences. Institute of Electrical Engineering) ;
Solovyov, Mykola (Slovak Academy of Sciences. Institute of Electrical Engineering) ;
Gömöry, Fedor (Slovak Academy of Sciences. Institute of Electrical Engineering) ;
Prat Camps, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ;
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física) ;
Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física)
Cloaking a three-dimensional object in free space from electromagnetic waves has recently become a theoretical possibility, although practical implementations can only be made in reduced schemes. If static fields are involved, requirements are less restrictive and some practical realizations have been possible. [...]
2013 - 10.1088/1367-2630/15/5/053019
New journal of physics, Vol. 15 (May 2013) , art. 053019
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7 p, 1.1 MB |
Geometrically controlled ratchet effect with collective vortex motion
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Rouco Gómez, Víctor (Institut de Ciència de Materials de Barcelona) ;
Palau, Anna (Institut de Ciència de Materials de Barcelona) ;
Monton, Carlos (University of California) ;
Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física) ;
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física) ;
Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física) ;
Obradors, Xavier (Institut de Ciència de Materials de Barcelona) ;
Puig i Molina, Mª Teresa (Institut de Ciència de Materials de Barcelona)
Rectified flux motion arising from the collective effect of many interacting vortices is obtained in a specially designed superconducting device. Ratchet structures with different asymmetric pinning potentials are generated by tuning the size, depth, and distribution of triangular blind-antidots in a high-temperature superconducting film. [...]
2015 - 10.1088/1367-2630/17/7/073022
New journal of physics, Vol. 17 (July 2015) , art. 73022
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10.
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14 p, 4.3 MB |
Magnetic illusion : transforming a magnetic object into another object by negative permeability
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Mach-Batlle, Rosa (Universitat Autònoma de Barcelona. Departament de Física) ;
Parra, Albert (Universitat Autònoma de Barcelona. Departament de Física) ;
Laut, Sergi (Universitat Autònoma de Barcelona. Departament de Física) ;
Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física) ;
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física) ;
Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física)
We theoretically predict and experimentally verify the illusion of transforming the magnetic signature of a 3D object into that of another arbitrary object. This is done by employing negative-permeability materials, which we demonstrate can be emulated by tailored sets of currents. [...]
2018 - 10.1103/PhysRevApplied.9.034007
Physical review applied, Vol. 9 (March 2018) , art. 034007
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