Zobrazeno 1 - 10
of 414
pro vyhledávání: '"P Mélinon"'
Publikováno v:
New Journal of Physics, Vol 17, Iss 4, p 043034 (2015)
It is known that covalent semiconductors become superconducting if conveniently doped with large concentration of impurities. In this article we investigate, using ab initio methods, if the same situation is possible for an ionic, large-band gap semi
Externí odkaz:
https://doaj.org/article/d2e4cba3026a49a7939af86dd29fa7f7
Autor:
Bouzerar, Richard, Machon, Denis, Melinon, Patrice, May, Daniel, Löw, Ute, Zhou, Shengqiang, Bouzerar, Georges
Publikováno v:
Phys. Rev. B 94, 094437 (2016)
Although InP and GaAs have very similar band-structure their magnetic properties appear to drastically differ. Critical temperatures in (In,Mn)P are much smaller than that of (Ga,Mn)As and scale linearly with Mn concentration. This is in contrast to
Externí odkaz:
http://arxiv.org/abs/1609.04227
Autor:
Hapiuk, Dimitri, Masenelli, Bruno, Masenelli-Varlot, Karine, Tainoff, Dimitri, Boisron, Olivier, Albin, Clement, Melinon, Patrice
Publikováno v:
Journal of Physical Chemistry C 2013, 117, 10220
Self-organization of nanoparticles is a major issue to synthesize mesoscopic structures. Among the possible mechanisms leading to self-organization, the oriented attachment is efficient yet not completely understood. We investigate here the oriented
Externí odkaz:
http://arxiv.org/abs/1307.2801
Publikováno v:
Nanotechnology 23 (2012) 305706
By the use of a point charge model based on the Judd-Ofelt transition theory, the luminescence from Eu3+ ions embedded in Gd2O3 clusters is calculated and compared to the experimental data. The main result of the numerical study is that without invok
Externí odkaz:
http://arxiv.org/abs/1305.7355
Autor:
Masenelli, Bruno, Mollet, Oriane, Boisron, Olivier, Canut, Bruno, Ledoux, Gilles, Bluet, Jean-Marie, Melinon, Patrice, Huant, Serge
Publikováno v:
Nanotechnology 24 (2013) 165703
We investigate the luminescence properties of 10 nm YAG nanoparticles doped with Ce ions at 0.2%, 4% and 13% that are designed as active probes for Scanning Near field Optical Microscopy. They are produced by a physical method without any subsequent
Externí odkaz:
http://arxiv.org/abs/1305.6919
Autor:
Cuche, A., Masenelli, B., Ledoux, G., Amans, D., Dujardin, C., Sonnefraud, Y., Melinon, P., Huant, S.
Publikováno v:
Nanotechnology 20, 015603 (2009)
We present a new kind of fluorescent oxide nanoparticles with properties well suited to active-tip based near-field optics. These particles with an average diameter in the range 5-10 nm are produced by Low Energy Cluster Beam Deposition (LECBD) from
Externí odkaz:
http://arxiv.org/abs/0807.3634
Autor:
Favre, Luc, Dupuis, Véronique, Bernstein, Estela, Mélinon, Patrice, Pérez, Alain, Stanescu, Stefan, Epicier, Thierry, Simon, Jean-Paul, Babonneau, David, Tonnerre, Jean-Marc
In this present work, we report a structural and magnetic study of mixed Co58Pt42 clusters. MgO, Nb and Si matrix can be used to embed clusters, avoiding any magnetic interactions between particles. Transmission Electron Microscopy (TEM) observations
Externí odkaz:
http://arxiv.org/abs/cond-mat/0605330
Autor:
Gerber, A., Milner, A., Finkler, A., Karpovski, M., Goldsmith, L., Tuaillon-Combes, J., Boisron, O., Melinon, P., Perez, A.
We study the contribution of different types of scattering sources to the extraordinary Hall effect. Scattering by magnetic nano-particles embedded in normal-metal matrix, insulating impurities in magnetic matrix, surface scattering and temperature d
Externí odkaz:
http://arxiv.org/abs/cond-mat/0310551
An improved micro-SQUID technique is presented allowing us to measure the temperature dependence of the magnetisation switching fields of single nanoparticles well above the critical superconducting temperature of the SQUID. Our first measurements on
Externí odkaz:
http://arxiv.org/abs/cond-mat/0106112
Autor:
Jamet, M., Negrier, M., Dupuis, V., Tuaillon-Combes, J., Melinon, P., Perez, A., Wernsdorfer, W., Barbara, B., Vogel, J., Baguenard, B.
A low concentration of cobalt clusters with a fcc structure and containing almost one thousand atoms are embedded in two different metallic matrices: platinum and niobium. Samples have been prepared using a co-deposition technique. Cobalt clusters pr
Externí odkaz:
http://arxiv.org/abs/cond-mat/0012324