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1.
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12 p, 5.1 MB |
Slow Magnetic Relaxation of Dy Adatoms with In-Plane Magnetic Anisotropy on a Two-Dimensional Electron Gas
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Bellini, Valerio (Istituto di Nanoscienze-CNR) ;
Rusponi, Stefano (École Polytechnique Fédérale de Lausanne. Institute of Physics) ;
Kolorenč, Jindřich (Czech Academy of Sciences. Institute of Physics) ;
Mahatha, Sanjoy K. (Thapar Institute of Engineering and Technology) ;
Valbuena, Miguel Ángel (Institut Català de Nanociència i Nanotecnologia) ;
Persichetti, Luca (Università di Roma "Tor Vergata") ;
Pivetta, Marina (École Polytechnique Fédérale de Lausanne. Institute of Physics) ;
Sorokin, Boris V. (École Polytechnique Fédérale de Lausanne. Institute of Physics) ;
Merk, Darius (École Polytechnique Fédérale de Lausanne. Institute of Physics) ;
Reynaud, Sébastien (École Polytechnique Fédérale de Lausanne. Institute of Physics) ;
Sblendorio, Dante (École Polytechnique Fédérale de Lausanne. Institute of Physics) ;
Stepanow, Sebastian (Eidgenössische Technische Hochschule Zürich) ;
Nistor, Corneliu (Eidgenössische Technische Hochschule Zürich) ;
Gargiani, Pierluigi (ALBA Laboratori de Llum de Sincrotró) ;
Betto, Davide (European Synchrotron Radiation Facility) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia) ;
Gambardella, Pietro (Eidgenössische Technische Hochschule Zürich) ;
Brune, Harald (École Polytechnique Fédérale de Lausanne. Institute of Physics) ;
Carbone, Carlo (Consiglio Nazionale delle Ricerche. Istituto di Struttura della Materia) ;
Barla, Alessandro (Consiglio Nazionale delle Ricerche. Istituto di Struttura della Materia)
We report on the magnetic properties of Dy atoms adsorbed on the (001) surface of SrTiO. X-ray magnetic circular dichroism reveals slow relaxation of the Dy magnetization on a time scale of about 800 s at 2. [...]
2022 -  10.1021/acsnano.2c04048
ACS nano, Vol. 16, Issue 7 (June 2022) , p. 11182-11193
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40 p, 2.2 MB |
Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
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Avci, Can Onur (Institut Català de Nanociència i Nanotecnologia) ;
Garello, Kevin (Institut Català de Nanociència i Nanotecnologia) ;
Nistor, Corneliu (Institut Català de Nanociència i Nanotecnologia) ;
Godey, Sylvie. (Institut Català de Nanociència i Nanotecnologia) ;
Ballesteros, Belén (Institut Català de Nanociència i Nanotecnologia) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia) ;
Barla, Alessandro (Consiglio Nazionale Delle Ricerche. Istituto di Struttura della Materia) ;
Valvidares, Manuel (ALBA Laboratori de Llum de Sincrotró) ;
Pellegrin, Eric. (ALBA Laboratori de Llum de Sincrotró) ;
Ghosh, Abhijit (ETH Zurich. Department of Materials) ;
Miron, Ioan Mihai (SPINTEC) ;
Boulle, Olivier (SPINTEC) ;
Auffret, Stéphane (SPINTEC) ;
Gaudin, Gilles (SPINTEC) ;
Gambardella, Pietro (Institut Català de Nanociència i Nanotecnologia)
We present a comprehensive study of the current-induced spin-orbit torques in perpendicularly magnetized Ta/CoFeB/MgO layers. The samples were annealed in steps up to 300 °C and characterized using x-ray-absorption spectroscopy, transmission electron microscopy, resistivity, and Hall effect measurements. [...]
2014 - 10.1103/PhysRevB.89.214419
Physical review B : Condensed matter and materials physics, Vol. 89, issue 21 (June 2014) , art. 214419
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3.
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18 p, 5.2 MB |
Molecular Approach for Engineering Interfacial Interactions in Magnetic/Topological Insulator Heterostructures
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González Cuxart, Marc (Institut Català de Nanociència i Nanotecnologia) ;
Valbuena, Miguel Ángel (Institut Català de Nanociència i Nanotecnologia) ;
Robles, Roberto (Centro de Física de Materiales (CSIC-UPV/EHU)) ;
Moreno, Cesar (Institut Català de Nanociència i Nanotecnologia) ;
Bonell, Frédéric (Institut Català de Nanociència i Nanotecnologia) ;
Sauthier, Guillaume (Institut Català de Nanociència i Nanotecnologia) ;
Imaz, Inhar (Institut Català de Nanociència i Nanotecnologia) ;
Xu, Heng (Institut Català de Nanociència i Nanotecnologia) ;
Nistor, Corneliu (ETH Zurich. Department of Materials) ;
Barla, Alessandro (Istituto di Struttura della Materia) ;
Gargiani, Pierluigi (ALBA Laboratori de Llum de Sincrotró) ;
Valvidares, Manuel (ALBA Laboratori de Llum de Sincrotró) ;
Maspoch Comamala, Daniel (Institut Català de Nanociència i Nanotecnologia) ;
Gambardella, Pietro (ETH Zurich. Department of Materials) ;
Valenzuela, Sergio O. (Institut Català de Nanociència i Nanotecnologia) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia)
Controlling interfacial interactions in magnetic/topological insulator heterostructures is a major challenge for the emergence of novel spin-dependent electronic phenomena. As for any rational design of heterostructures that rely on proximity effects, one should ideally retain the overall properties of each component while tuning interactions at the interface. [...]
2020 - 10.1021/acsnano.0c02498
ACS nano, Vol. 14, Issue 5 (May 2020) , p. 6285-6294
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4.
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14 p, 1.8 MB |
Towards microscopic control of the magnetic exchange coupling at the surface of a topological insulator
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Rüssmann, Philipp (Peter Grünberg Institut) ;
Mahatha, Sanjoy K. (Aarhus University. Department of Physics and Astronomy) ;
Sessi, Paolo (Universität Würzburg) ;
Valbuena, Miguel Ángel (Institut Català de Nanociència i Nanotecnologia) ;
Bathon, Thomas (Universität Würzburg) ;
Fauth, Kai (Universität Würzburg) ;
Godey, Sylvie (Institut Català de Nanociència i Nanotecnologia) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia) ;
Kokh, Konstantin A. (Novosibirsk State University) ;
Tereshchenko, Oleg E. (Novosibirsk State University) ;
Gargiani, Pierluigi (ALBA Laboratori de Llum de Sincrotró) ;
Valvidares, Manuel (ALBA Laboratori de Llum de Sincrotró) ;
Jiménez, Erika (European Synchrotron Radiation Facility) ;
Brookes, N. B (European Synchrotron Radiation Facility) ;
Bode, Matthias (Universität Würzburg) ;
Bihlmayer, G (Peter Grünberg Institut) ;
Blügel, Stefan (Peter Grünberg Institut) ;
Mavropoulos, Phivos (Peter Grünberg Institut) ;
Carbone, Carlo (Istituto di Struttura della Materia) ;
Barla, Alessandro (Istituto di Struttura della Materia)
Magnetically doped topological insulators may produce novel states of electronic matter, where for instance the quantum anomalous Hall effect state can be realized. Pivotal to this goal is a microscopic control over the magnetic state, defined by the local electronic structure of the dopants and their interactions. [...]
2018 - 10.1088/2515-7639/aad02a
JPhys materials, Vol. 1, Núm. 1 (September 2018) , art. 015002
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5.
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15 p, 5.7 MB |
Superparamagnetism-induced mesoscopic electron focusing in topological insulators
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Sessi, Paolo (Universität Würzburg) ;
Rüßmann, P. (Peter Grünberg Institut) ;
Bathon, Thomas (Universität Würzburg) ;
Barla, Alessandro (Consiglio Nazionale Delle Ricerche) ;
Kokh, K. A. (Novosibirsk State University) ;
Tereshchenko, O. E. (Russian Academy of Sciences) ;
Fauth, Kai (Universität Würzburg) ;
Mahatha, Sanjoy K (Consiglio Nazionale Delle Ricerche) ;
Valbuena, Miguel Ángel (Institut Català de Nanociència i Nanotecnologia) ;
Godey, Sylvie (Institut Català de Nanociència i Nanotecnologia) ;
Glott, F. (Physikalisches Institut. Experimentelle Physik II. Universität Würzburg) ;
Mugarza, Aitor (Institut Català de Nanociència i Nanotecnologia) ;
Gargiani, Pierluigi (ALBA Laboratori de Llum de Sincrotró) ;
Valvidares, Manuel (ALBA Laboratori de Llum de Sincrotró) ;
Long, N. H. (Peter Grünberg Institut) ;
Carbone, Carlo (Consiglio Nazionale Delle Ricerche) ;
Mavropoulos, Phivos (Peter Grünberg Institut) ;
Blügel, Stefan (Peter Grünberg Institut) ;
Bode, Matthias (Universität Würzburg)
Recently it has been shown that surface magnetic doping of topological insulators induces backscattering of Dirac states which are usually protected by time-reversal symmetry [Sessi, Nat. Commun. 5, 5349 (2014)10. [...]
2016 - 10.1103/PhysRevB.94.075137
Physical review B, Vol. 94, Issue 7 (August 2016) , art. 75137
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