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360 p, 11.5 MB |
High-Tc Magnetic Spirals and Fe-based Frustrated Multiferroics
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Romaguera Camps, Arnau ;
Herrero Martin, Javier, dir. ;
Garcia Muñoz, José Luis, dir.
Aquesta tesi recull una investigació sobre òxids magnètics frustrats que poden desenvolupar potencialment multiferroicitat a alta temperatura. L'ús d'aquests materials, amb acoblament magnetoelèctric, podria permetre baixos consums energètics en l'operació de nous dispositius d'emmagatzematge de dades així com el desenvolupament d'electrònica d'ultra baixa potència. [...]
Esta tesis recoge una investigación de óxidos magnéticos frustrados, de interés como potenciales materiales multiferroicos de alta temperatura. El uso de este tipo de materiales, con acoplamiento magnetoeléctrico, podría permitir bajos consumos energéticos en la operación de nuevos dispositivos de almacenamiento de datos y el desarrollo de electrónica de ultra baja potencia. [...]
This thesis work investigates frustrated magnetic oxides as potential materials to develop high-temperature multiferroicity. Multiferroic materials with magnetoelectric coupling are promising candidates for low-energy switching in data storage devices and might lead to ultra-low-power electronics. [...]
2023
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2.
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255 p, 10.9 MB |
Enhancing the High-temperature Chiral Magnetic State in YBaCuFeO5
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Zhang, Xiaodong ;
García-Muñoz, José Luis, dir. ;
Herrero-Martín, Javier, dir.
Los materiales multiferroicos magnetoeléctricos - en los que el orden magnético induce ferroelectricidad - están atrayendo mucho interés debido a la gran importancia de poder controlar el estado magnético a través de la aplicación de campos eléctricos y viceversa. [...]
Magnetoelectric multiferroic materials, where magnetic order induces ferroelectricity are attracting high interest because of the importance of controlling magnetism by electric fields and vice versa. [...]
2022
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3.
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7 p, 1.3 MB |
Coexistence of structural and magnetic phases in van der Waals magnet CrI3
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Meseguer-Sánchez, Jaume (Universitat de València. Instituto de Ciencia Molecular) ;
Popescu, Catalin (ALBA Laboratori de Llum de Sincrotró) ;
García-Muñoz, José Luis (Institut de Ciència de Materials de Barcelona) ;
Luetkens, Hubertus (Paul Scherrer Institute. Laboratory for Muon Spin Spectroscopy) ;
Taniashvili, Grigol (Tbilisi State University. Department of Physics (Georgia)) ;
Navarro-Moratalla, Efrén (Universitat de València. Instituto de Ciencia Molecular) ;
Guguchia, Zurab (Paul Scherrer Institute. Laboratory for Muon Spin Spectroscopy) ;
Santos, Elton J. G. (The University of Edinburgh. Higgs Centre for Theoretical Physics)
CrI3 has raised as an important system to the emergent field of two-dimensional van der Waals magnetic materials. However, it is still unclear why CrI3 which has a ferromagnetic rhombohedral structure in bulk, changed to anti-ferromagnetic monoclinic at thin layers. [...]
2021 -  10.1038/s41467-021-26342-4
Nature communications, Vol. 12 (November 2021) , art. 6265
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21 p, 1.9 MB |
Unveiling a New High-Temperature Ordered Magnetic Phase in ϵ-Fe2O3
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García-Muñoz, José Luis (Institut de Ciència de Materials de Barcelona) ;
Romaguera, Arnau (Institut de Ciència de Materials de Barcelona) ;
Fauth, François (ALBA Laboratori de Llum de Sincrotró) ;
Nogués, Josep (Institut Català de Nanociència i Nanotecnologia) ;
Gich García, Martí (Institut de Ciència de Materials de Barcelona)
Iron oxides are among the most abundant materials on Earth, and yet there are some of their basic properties which are still not well-established. Here, we present temperature-dependent magnetic, X-ray, and neutron diffraction measurements refuting the current belief that the magnetic ordering temperature of ϵ-FeO is ∼500 K, i. [...]
2017 - 10.1021/acs.chemmater.7b03417
Chemistry of materials, Vol. 29, Issue 22 (November 2017) , p. 9705-9713
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309 p, 8.4 MB |
Spin-lattice coupling in strongly correlated cobalt oxides investigated by synchrotron and neutron techniques
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Padilla-Pantoja, Jessica ;
García-Muñoz, José Luis (Físic), dir. ;
Herrero-Martín, Javier, dir. ;
Granados García, Xavier, tut. ;
Universitat Autònoma de Barcelona.
Departament de Física
El trabajo que se presenta en esta tesis has sido realizado entre Enero del 2011 y Diciembre del 2015 en el Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), con la colaboración del Sincrotrón ALBA (Cerdanyola del Vallès). [...]
The work presented in this thesis has been carried out between January of 2011 and December of 2015 at the Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), with the collaboration of the ALBA Synchrotron Light Source (Cerdanyola del Vallès). [...]
[Barcelona] : Universitat Autònoma de Barcelona, 2016
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6.
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260 p, 5.6 MB |
Magnetic order, spin-induced ferroelectricity and structural studies in multiferroic Mn1 xCoxWO4
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Urcelay Olabarria, Irene ;
Skumryev, Vassil, dir. ;
Ressouche, Eric, dir. ;
García-Muñoz, José Luis, dir. ;
Universitat Autònoma de Barcelona.
Departament de Física
El presente manuscrito resume el trabajo realizado durante los últimos tres años en el Institut Laue Langevin (Grenoble) en colaboración con el Instituto de Ciencia de Materiales de Barcelona, la Universitat Autònoma de Barcelona y el Commissariat à l'énergie atomique et aux énergies alternatives (Grenoble). [...]
The manuscript summarizes the work done during the last three years in the Institut Laue Langevin (Grenoble) in collaboration with the Instituto de Ciencia de Materiales de Barcelona, the Universitat Autònoma de Barcelona and the Commissariat à l'énergie atomique et aux énergies alternatives (Grenoble). [...]
[Barcelona] : Universitat Autònoma de Barcelona, 2013
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7.
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10 p, 1.2 MB |
Neutron diffraction, magnetic, and magnetoelectric studies of phase transitions in multiferroic Mn0.90Co0.10WO4
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Urcelay Olabarria, Irene (Institut Laue-Langevin) ;
Ressouche, Eric (Commissariat à l'Énergie Atomique et aux Énergies Alternatives (França)) ;
Mukhin, A. A. (Institut obshcheĭ fiziki im. A.M. Prokhorova) ;
Ivanov, Vsevolod (Institut obshcheĭ fiziki im. A.M. Prokhorova) ;
Balbashov, A. M. (Moscow Power Engineering Institute) ;
Vorobev, G. P. (Moskovskiĭ gosudarstvennyĭ universitet im. M.V. Lomonosova) ;
Popov, Yu F. (Moskovskiĭ gosudarstvennyĭ universitet im. M.V. Lomonosova) ;
Kadomtseva, A. M. (Moskovskiĭ gosudarstvennyĭ universitet im. M.V. Lomonosova) ;
García-Muñoz, José Luis (Institut de Ciència de Materials de Barcelona) ;
Skumryev, Vassil (Universitat Autònoma de Barcelona. Departament de Física)
We have studied various spontaneous and magnetic-field-induced phase transitions in single crystals of multiferroic Mn0. 9Co0. 1WO4 using magnetic and magnetoelectric measurements and neutron diffraction. [...]
2012 - 10.1103/PhysRevB.85.094436
Physical review B : condensed matter and materials physics, Vol. 85, Núm. 9 (March 2012) , p. 094436/1-094436/10
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8.
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6 p, 880.4 KB |
Conical antiferromagnetic order in the ferroelectric phase of Mn0.8Co0.2WO4 resulting from the competition between collinear and cycloidal structures
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Urcelay Olabarria, Irene (Institut Laue-Langevin) ;
Ressouche, Eric (Commissariat à l'Énergie Atomique et aux Énergies Alternatives (França)) ;
Mukhin, A. A. (Institut obshcheĭ fiziki im. A.M. Prokhorova) ;
Ivanov, Vsevolod (Institut obshcheĭ fiziki im. A.M. Prokhorova) ;
Balbashov, A. M. (Moscow Power Engineering Institute) ;
García-Muñoz, José Luis (Institut de Ciència de Materials de Barcelona) ;
Skumryev, Vassil (Universitat Autònoma de Barcelona. Departament de Física)
Evolution of competing commensurate collinear (AF4) and incommensurate cycloidal (AF2) magnetic structures in Mn0. 8Co0. 2WO4 multiferroic was studied by neutron diffraction, magnetic, and pyroelectric characterization measurements. [...]
2012 - 10.1103/PhysRevB.85.224419
Physical review B : condensed matter and materials physics, Vol. 85, Núm. 22 (June 2012) , p. 224419/1-224419/6
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