Výsledky vyhledávání - "E. Fernandez Pinel"

Magnetic Properties of ZnO Nanoparticles

Autor: Antonio Hernando, P. Crespo, M L Ruíz González, Germán R. Castro, A. Quesada, J. de la Venta, José M. González-Calbet, Miguel A. García, J. Llopis, Jesús Merino, E. Fernandez Pinel

Publikováno v: E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
E-Prints Complutense. Archivo Institucional de la UCM
instname

We experimentally show that it is possible to induce room-temperature ferromagnetic-like behavior in ZnO nanoparticles without doping with magnetic impurities but simply inducing an alteration of their electronic configuration. Capping ZnO nanopartic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::214aa656edfb733d67bcd1bbe9995660
https://doi.org/10.1021/nl070198m

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MAGNETIC PROPERTIES OF ORGANIC COATED GOLD SURFACES

Autor: J. de la Venta, Antonio Hernando, O. Rodríguez de la Fuente, Asunción Fernández, P. Crespo, Soledad Penadés, C. de Julián Fernández, Miguel Angel Garcia, E. Fernandez Pinel

Publikováno v: E-Prints Complutense. Archivo Institucional de la UCM
instname
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid

We review here our recent results of experimental observation of room temperature magnetism in gold nanoparticles (NPs) and thin films. Capping gold surfaces with certain organic molecules leads to the appearance of magnetism at room temperature. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11d2e91f1147355ba6140a372438f760
https://doi.org/10.1142/s0217984907012761

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Magnetism in Polymers with Embedded Gold Nanoparticles

Autor: Paolo Mazzoldi, Andrea Pucci, Giacomo Ruggeri, J. de la Venta, Antonio Hernando, E. Fernandez Pinel, C. de Julián Fernández, Miguel A. García, P. Crespo

Publikováno v: Advanced Materials. 19:875-877

preserve the surprising magnetic properties induced at thenanoscale. NPs exhibit a large fraction of surface atoms, whichare different to those of the bulk volume mainly because ofthe broken symmetry at the surface, which alters their elec-tronic con

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e11d8afac9c5f0391ac638c2e953c702
https://doi.org/10.1002/adma.200600984

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Room-temperature ferromagnetism in the mixtures of theTiO2andCo3O4powders

Autor: Lucas Pérez, Adrián Quesada, Marisol Martín-González, M. A. García, J. Llopis, Aida Serrano, M. Plaza, J. de la Venta, E. Fernandez Pinel, José Luis Costa-Krämer, F. Jiménez-Villacorta, José F. Fernández, Israel Lorite

Publikováno v: Physical Review B. 79

We report here the observation of ferromagnetism (FM) at 300 K in mixtures of TiO₂ and Co₃O₄ powders despite the antiferromagnetic and diamagnetic characters of both oxides, respectively. The ferromagnetic behavior is found in the early stages

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::df56a246818d69a5cf377b674eafe042
https://doi.org/10.1103/physrevb.79.144405

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Fe impurities weaken the ferromagnetic behavior in Au nanoparticles

Autor: P. Crespo, David Alcantara, Antonio Hernando, Marta Multigner, Soledad Penadés, J. M. de la Fuente, Miguel A. García, E. Fernandez Pinel

Publikováno v: E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
Digital.CSIC. Repositorio Institucional del CSIC
instname
E-Prints Complutense. Archivo Institucional de la UCM

4 páginas, 4 figuras, 1 tabla.
In this Letter, we report on a crucial experiment showing that magnetic impurities reduce the ferromagnetic order temperature in thiol-capped Au glyconanoparticles (GNPs). The spontaneous magnetization of AuFe GNP

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a70b7f5614c02e8c4a4b13a5ff43ac11
http://eprints.ucm.es/41792/

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Giant magnetic anisotropy at nanoscale: overcoming the superparamagnetic limit

Autor: P. Crespo, Soledad Penadés, J. de la Venta, E. Fernandez Pinel, Asunción Fernández, Antonio Hernando, Miguel A. García

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
E-Prints Complutense: Archivo Institucional de la UCM
Universidad Complutense de Madrid
idUS. Depósito de Investigación de la Universidad de Sevilla
E-Prints Complutense. Archivo Institucional de la UCM

4 páginas, 3 figuras.
It has been observed for palladium and gold nanoparticles that the magnetic moment at a constant applied field does not change with temperature over the range comprised between 5 and 300 K. These samples, with sizes smalle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8269e849449f675f270032a4f7c10f8c
http://arxiv.org/abs/cond-mat/0605171

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