6 Papers
51 Citations
H. Bernas is an academic researcher from Centre national de la recherche scientifique. The author has contributed to research in topics: Irradiation & Ion. The author has an hindex of 6, co-authored 6 publications.
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Papers
In situ studies of microstructural changes in YBa2Cu3O7-x during O and He irradiation
TL;DR: In this article, the microstructural changes occurring in YBa2Cu3O7-x (the so-called "123" phase) upon room temperature irradiation by He+ and O+, in situ, on samples that had been thinned by ion milling before irradiation, using a transmission electron microscope on line with the ion implanter.
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In situ structural evolution of ion-irradiated R─Ba─Cu─O (R = Eu, Gd) superconductors
TL;DR: In this article, an in situ transmission electron microscopy study of damage evolution of Eu-Ba-Cu-O and Gd-Ba/Cu/O ceramics under 50keV He ion irradiation was performed.
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High resolution electron microscopy of ion-irradiated GdBa2Cu3O7
TL;DR: GdBa{sub 2}Cu{sub 3}O{sub 7} crystals were irradiated at room temperature with 200 keV Ne ions and 300 keV Xe ions and further HREM studies showed two types of extended defects: (i) mobile extended defects, which account for the preferential defect pinning to twin boundaries reported earlier; (ii) stable amorphous areas which are clearly identified by HREM observations.
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Structural effect of heavy ion irradiation on GdBaCuO ceramics
M.-O. Ruault,H. Bernas,M. Gasgnier,J.C. Levet,Henri Noël,Patrick Gougeon,Michel Potel +6 more
- 01 Jan 1990
TL;DR: In this article, the influence of twin boundaries as sinks on defects induced by 480 keV Kr ion irradiation in GdBaCuO crystals was observed in situ at 40 and 300 K. The interaction of the dislocations with the twin boundaries followed on a video recording.
Structural change induced in Kr irradiated RBaCuO ceramics (R Gd, Ho)
M.-O. Ruault,M. Barrachin,Jerome Lesueur,L. Dumoulin,H. Bernas,M. Gasgnier,J.C. Levet,Henri Noël,R. Gougeon,Michel Potel +9 more
TL;DR: In situ electron microscopy was performed during irradiation from 5×10 11 to 2.5×10 13 Kr/cm 2 as discussed by the authors, where the large deposited energy has two effects: (i) it leads to amorphization at low (≈0.02) displacement per atom ratios, presumably due to cation “backbone disordering; (ii) it produces visible extended defects which interact each other and with the twin boundaries.
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