Výsledky vyhledávání - "Roland Currat"

APERIODIC'97 - Proceedings Of The International Conference On Aperiodic Crystals

Autor: Jean-Louis Verger-Gaugry, Marc de Boissieu, Roland Currat

Publikováno v: APERIODIC '97
Roland Currat (Editor), Marc de Boissieu (Editor), Jean-Louis Verger-gaugry (Editor). APERIODIC '97, Aug 1997, Alpe d'Huez, France. World Scientific Publishing Co Pte Ltd (2 February 1999), 828 p., 1999, APERIODIC '97, ISBN-10 ‏ : ‎ 981023371X-ISBN-13 ‏ : ‎ 978-9810233716

Dimensions ‏ : ‎ 16.51 x 5.08 x 22.23 cm; International audience

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e86f30ea08150220be8ea2b822cfdab
https://hal.archives-ouvertes.fr/hal-03154174

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Lattice dynamics of the Zn–Mg–Sc icosahedral quasicrystal and its Zn–Sc periodic 1/1 approximant

Autor: Yvan Sidis, S. Francoual, Tsutomu Ishimasa, Franz Gähler, Kaoru Shibata, Satoshi Tsutsui, Roland Currat, An Pang Tsai, B. Hennion, Alfred Q. R. Baron, D. Wu, Pierre Bastie, Thomas A. Lograsso, Marek Mihalkovic, Taku J. Sato, Hiroyuki Takakura, Marc de Boissieu, L. P. Regnault

Publikováno v: Nature Materials. 6:977-984

Quasicrystals are long-range-ordered materials that lack translational invariance, so the study of their physical properties remains a challenging problem. Here, we have carried out inelastic-X-ray- and neutron-scattering experiments on single-grain

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bf2dcd8d44b188949dd3b5a57a8bec34
https://doi.org/10.1038/nmat2044

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Experimental study of the dynamics of Zn2Mg Laves phase

Autor: An Pang Tsai, Kaoru Shibata, M. de Boissieu, S. Francoual, Yvan Sidis, B. Hennion, Roland Currat

Publikováno v: Journal of Non-Crystalline Solids. 353:3182-3187

A way to address the problem of phonons in quasicrystals (QCs) is to compare their dynamical response with that of approximant crystalline structures. Although the Zn2Mg Laves phase is not a periodic approximant of a QC phase, its structure is a peri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d96b1a2ef2a60b17cdd5933059d028bb
https://doi.org/10.1016/j.jnoncrysol.2007.05.052

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Experimental study of the dynamics of icosahedral phases

Autor: Kaoru Shibata, Roland Currat, Alfred Q. R. Baron, An Pang Tsai, Satoshi Tsutsui, M. de Boissieu

Publikováno v: Journal of Non-Crystalline Solids. :303-307

We review experimental results obtained in the study of the dynamics of icosahedral phases by mean of inelastic neutron and X-ray scattering on single grains of the i-AlPdMn, i-ZnMgY and i-CdYb phases. Although the three phases have very different at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7265e96d369d354aa2279acf5006c72b
https://doi.org/10.1016/j.jnoncrysol.2003.11.062

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Experimental Study of Phonon Dynamics in the Icosahedral i-CdYb Phase and its 1/1 Periodic Approximant

Autor: Thomas A. Lograsso, H. Takakura, M. de Boissieu, A. R. Ross, S. Francoual, Alfred Q. R. Baron, Roland Currat, Kaoru Shibata, Satoshi Tsutsui, An Pang Tsai

Publikováno v: Ferroelectrics. 305:235-238

We report on a comparative dynamical study carried out by inelastic X-ray scattering on the i-Cdit5.7Yb quasicrystal and on its 1/1 approximant Cdit6Yb. The phonon response function is shown to be very similar in both systems, with well defined acous

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a0a760398684b72fa1d4b1b584f7f9da
https://doi.org/10.1080/00150190490462937

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Observation of a sample-dependent 37 K anomaly on the lattice parameters of strontium titanate

Autor: Eric Courtens, Klaus-Dieter Liss, Roland Currat, Ludovic Arzel, Bernard Hehlen, F. Dénoyer

Publikováno v: Europhysics Letters (EPL). 61:653-659

The lattice parameters of tetragonal strontium titanate are determined to about 1 part in 106 with penetrating X-rays. While no peculiarity is detected in a bulk sample, a distinct anomaly at 37 K is observed in an optically polished thin platelet de

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49105a570f15bbce0a9342a9f9080e3d
https://doi.org/10.1209/epl/i2003-00121-4

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Studies of the dynamics in charge-density-wave systems using inelastic X-ray scattering with meV-energy-resolution

Autor: Herwig Requardt, Roland Currat, J. E. Lorenzo, Pierre Monceau, R. Danneau

Publikováno v: Journal de Physique IV. 12:39-42

We report measurements of the dynamics of the charge-density-wave systems K0.3MoO3 and NbSe3 applying the quite recent technique of meV-resolution inelastic X-ray scattering (IXS). In K0.3MoO3, serving as a test-case with existing reference results f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::452c7468f5b8b29d51df01ed884007e5
https://doi.org/10.1051/jp4:20020349

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Dynamics of the ZnMgY icosahedral phase

Autor: M. de Boissieu, Kaoru Shibata, Roland Currat, Taku J. Sato, H. Takakura, An Pang Tsai

Publikováno v: Journal of Alloys and Compounds. 342:278-282

The dynamics of the icosahedral ZnMgY phase has been investigated on a single-grain quasicrystalline sample using inelastic neutron scattering. Similarly to other quasicrystals we observe well defined acoustic modes for values of the wavevector small

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66058bc97b8b247a5530f526139e705e
https://doi.org/10.1016/s0925-8388(02)00192-5

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Temperature dependence of the 8-Å superstructure in decagonal Al–Co–Ni

Autor: Garry J. McIntyre, Friedrich Frey, K. Hradil, M. de Boissieu, Eveline Weidner, A. Letoublon, An Pang Tsai, Roland Currat

Publikováno v: Journal of Alloys and Compounds. 342:57-64

Diffuse layers corresponding to an 8 A superperiod along the ‘periodic’ axis of decagonal Al–Ni–Co phases were investigated by in situ X-ray and neutron diffraction at temperatures up to 980 °C. The diffuse layers consist of an unstructured

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ac24875979e79193f4c283a4f3d19e2
https://doi.org/10.1016/s0925-8388(02)00134-2

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Low-T Ferroelectricity in Antiphase Domain Boundaries of SrTiO 3

Autor: Ludovic Arzel, Alexander K. Tagantsev, Bernard Hehlen, Roland Currat, Klaus-Dieter Liss, F. Dénoyer, Eric Courtens

Publikováno v: Ferroelectrics. 267:317-322

The ferroelectric transition of bulk strontium titanate is suppressed by a combination of two effects: (1) the structural changes produced by the antiferrodistortive transition at T-a =105 K and (2) the quantum fluctuations. The structural changes ar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c537eaf28f884eb404e6e31252159cd6
https://doi.org/10.1080/00150190211011

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