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2014

Articles:

Gopman, D.B., Bedau, D., Mangin, S., Fullerton, E.E., Katine, J.A. and Kent, A.D.
Physical Review B - Condensed Matter and Materials Physics, 89(13)
2014

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

Gopman, D.B., Bedau, D., Mangin, S., Fullerton, E.E., Katine, J.A. and Kent, A.D.
Journal of Applied Physics, 115(11)
2014

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

Bénéteau, Adeline, Aeby-Gautier, Elisabeth, Geandier, Guillaume, Weisbecker, Patrick, Redjaimia, Abdelkrim and Appolaire, Benoit
Acta Materialia, 81:30--40
2014
ISSN: 1359-6454

Equipe: Département SI2M : Microstructures et Contraintes

Nominé, A., Martin, J., Noel, C., V. Bardin, I., L. Kovalev, V., Belmonte, T., G. Rakoch, A. and Henrion, G.
Applied Physics Letters, 104:081603
2014

Resume: Plasma electrolytic oxidation (PEO) processing of EV31 magnesium alloy has been carried out in fluoride containing electrolyte under bipolar pulse current regime. Unusual PEO cathodic microdischarges have been observed and investigated. It is shown that the cathodic micro-discharges exhibit a collective intermittent behavior, which is discussed in terms of charge accumulations at the layer/electrolyte and layer/metal interfaces. Optical emission spectroscopy is used to determine the electron density (typ. 1015cm_3) and the electron temperature (typ. 7500K) while the role of F_ anions on the appearance of cathodic micro-discharges is pointed out.

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Leroy, M.-A., Bataille, A.M., Dkhil, B., Porcher, F., Barbier, A., Jacques, V.L.R., Lu, Y., Bellouard, C., Hauet, T., Ravy, S., Herrero-Martin, J., Gatel, C., Bouzehouane, K., Gukasov, A., Andrieu, S. and Tiusan, C.
Physical Review B - Condensed Matter and Materials Physics, 90(3)
2014

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

2013

Articles:

Gazeli, K., Noel, C., Clement, F., Daugé, C., Svarnas, P. and Belmonte, T.
Plasma Sources Science and Technology, 22:025020
2013

Resume: The origin of differences in the rotational temperatures of various molecules and ions (N-2(+)(B), OH(A) and N-2(C)) is studied in helium atmospheric-pressure guided streamers. The rotational temperature of N-2(+)(B) is room temperature. It is estimated from the emission band of the first negative system at 391.4 nm, and it is governed by the temperature of N-2(X) in the surrounding air. N-2(X) is ionized by direct electron impact in the outer part of the plasma. N-2(+)(B) is deactivated by collisions with N-2 and O-2. The rotational temperature of OH(A), estimated from the OH band at 306.4 nm, is slightly higher than that of N-2(+)(B). OH(A) is excited by electron impact with H2O during the first 100 ns of the applied voltage pulse. Next, OH(A) is produced by electron impact with OH(X) created by the quenching of OH(A) by N-2 and O-2. H2O diffuses deeper than N-2 into the plasma ring and the rotational temperature of OH(A) is slightly higher than that of N-2(+)(B). The rotational temperature of N-2(C), estimated from the emission of the second positive system at 315.9 nm, is governed by its collisions with helium. The gas temperature of helium at the beginning of the pulse is predicted to be several hundred kelvin higher than room temperature.

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Bieber, T., Glad, X., De Poucques, L, Hugon, R., Vasseur, J.-L. and Bougdira., J.
The Open Plasma Physics Journal, 6:32-43
2013

Resume: This paper deals with pure argon plasma studied in a magnetically enhanced inductively coupled reactor. Laser induced fluorescence technique was performed with an optical parametric oscillator laser on the 3d4F7/2 and 3d2G9/2 Ar+ metastable levels and on the (2P03/2)4s2 neutral metastable state to determine their relative densities. Langmuir probe was used as a complementary diagnostic to measure the electron energy distribution functions. When increasing the confinement magnetic field, the metastable state density collapses for all cited levels, by contrast with ne which is continuously growing. Calculations were carried out for neutral argon to explain this behaviour. The results show that the metastable population is depleted by electron-impact excitation and ionization, these loss processes becoming dominant compared to the metastable state creation term.

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Kalitsov, A., Zermatten, P.-J., Bonell, F., Gaudin, G., Andrieu, S., Tiusan, C., Chshiev, M. and Velev, J.P.
Journal of Physics Condensed Matter, 25(49)
2013

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

Pushkareva, I., Scott, C., Goune, M., Valle, N., Redjaïmia, A. and Moulin, A
ISIJ International, 53:1215-1223
2013

Equipe: Département SI2M : Microstructures et Contraintes

G. Rakoch, A., Nominé, A., A. Gladkova, A., L. Kovaleva, V. and V. Bardin, I.
Russian Journal of Non Ferrous Metals, 54(1):8-12
2013

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

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