Výsledky vyhledávání - "J. Y. Prieur"

Strong reduction of the coercivity by a surface acoustic wave in an out-of-plane magnetized epilayer

Autor: P. Rovillain, Catherine Gourdon, J.-Y. Duquesne, J.-Y. Prieur, Ibrahima Camara, Laura Thevenard, Aristide Lemaître

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2016, 93, pp.140405. ⟨10.1103/PhysRevB.93.140405⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 93, pp.140405. ⟨10.1103/PhysRevB.93.140405⟩

International audience; Inverse magnetostriction is the effect by which magnetization can be changed upon application of stress/strain. A strain modulation may be created electrically by exciting interdigitated transducers to generate surface acousti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ee037c2ebdd8e4dd4b09df8b9526546
http://arxiv.org/abs/1602.09064

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Magnetic field dependence of the acoustic two‐pulse echo envelope modulation in Si:B at very low temperatures

Autor: Alois Würger, K Laßmann, J. Joffrin, J.-Y. Prieur

Publikováno v: physica status solidi (c). 1:2795-2798

At temperatures below about 30 mK in Si:B the phase relaxation time T2 of the two-level systems associated with the acceptor ground state can be determined from the decay of the two-pulse echo. It has been shown to depend on the concentration of inte

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::667a2b178f809da89e8ba535651296f5
https://doi.org/10.1002/pssc.200405357

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Acoustic solitons, phonon echoes, and sound amplification in Si:B at very low temperatures

Autor: K Laßmann, J.-Y. Prieur, J. Joffrin

Publikováno v: Physica B: Condensed Matter. :125-128

Phonon echoes, sound amplification, and acoustic solitons are observed in Si:B at temperatures below about 25 mK depending on the density of states of two-level systems associated with the acceptor ground state. We report on the influence of acceptor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::776882352dd117f2d88e0b152fc307c2
https://doi.org/10.1016/s0921-4526(02)00438-6

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Surface acoustic wave triggering of giant magnetocaloric effect in MnAs/GaAs devices

Autor: M. Eddrief, Massimiliano Marangolo, J.-Y. Prieur, W. Karboul-Trojet, J.-Y. Duquesne, Victor H. Etgens, Loïc Becerra

Publikováno v: Applied Physics Letters
Applied Physics Letters, 2014, 105 (16), pp.162403. ⟨10.1063/1.4898387⟩

International audience; We have measured the attenuation of surface acoustic waves travelling through lithographied hybrid structures composed of MnAs thin films epitaxied on piezoelectric GaAs. Around room temperature, MnAs presents a well-known mag

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ed25ee95015fffbfd76eb2b0d8bbe50
https://hal.science/hal-01233807

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Resistivity in the mixed state of YBCO thin films with different oxygen contents

Autor: J. Joffrin, M. Stenger, S. Friemel, J.-Y. Prieur, S. Baumhoff

Publikováno v: Solid State Communications. 110:115-119

We report electrical transport measurements of thin YBCO-films with three different oxygen contents in the mixed state, with a magnetic field applied perpendicular to the CuO2 layers. We have analysed our resistivity data in the framework of two mode

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::507ba363ead44d577cdf0455ab905570
https://doi.org/10.1016/s0038-1098(98)00608-5

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Anomalies of attenuation and phase velocity of surface acoustic waves in thin films in the vicinity of

Autor: J.-P. Contour, M. Stenger, S. Baumhoff, J. Joffrin, J.-Y. Prieur

Publikováno v: The European Physical Journal B. 2:177-182

We present measurements of the attenuation and phase velocity of surface acoustic waves in thin YBa2Cu3O YBa2Cu3O7‒δ films as a function of temperature, in magnetic fields up to 3.6 T applied parallel to the c-axis of the films. We have observed a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::269a7a88a8e0ed308db8dc7f75589d35
https://doi.org/10.1007/s100510050238

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Mutual inductance critical current measurements in oxygen-deficient YBa2Cu3O7?? thin films

Autor: M. Stenger, C. Barre, J.-Y. Prieur, Roger Wördenweber, J. Joffrin

Publikováno v: Journal of Low Temperature Physics. 105:1313-1318

Comparative studies of a standard four-contact DC method and a contactless mutual inductance setup have been carried out on the temperature dependence of the critical current of YBa2Cu3O7−δ (YBCO) thin films. The DC measurements are restricted to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e4b54648a69c1b201db6d7ed16694634
https://doi.org/10.1007/bf00753882

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In situ X-ray measurements of oxygen-out diffusion in YBa2Cu3O7−δ thin films

Autor: J.-Y. Prieur, M. Stenger, J. Joffrin, T. Königs, G. Ockenfuß, Roger Wördenweber, M. Reese, C. Barre

Publikováno v: Solid State Communications. 98:777-780

In order to change the oxygen content of YBa 2 Cu 3 O 7−δ thin films, we have measured the YBCO c-axis length “in situ” by X-ray analysis while heating the films in a flow of 10 mbar of molecular oxygen. We observed two kinds of c-axis length

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::97b753273bb9322fcdd9fdc312d46558
https://doi.org/10.1016/0038-1098(96)00201-3

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Sound amplification by stimulated emission of phonons using two-level systems in glasses

Autor: M. Stenger, J.-Y. Prieur, M. Devaud, J. Joffrin, C. Barre, M. Chapellier

Publikováno v: Physica B: Condensed Matter. :235-238

We discuss different possibilities to amplify an ultrasonic wave in a glass by inverting the populations of the two-level systems: we show that the only convenient one is the so-called “rapid adiabatic passage”. We describe different steps of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72edc18a6869ae96e7564d4919ffdee9
https://doi.org/10.1016/0921-4526(95)00706-7

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Ultrasonic triggering of giant magnetocaloric effect in MnAs thin films

Autor: A. L. Ferreira, M. Eddrief, J.-Y. Prieur, Victor H. Etgens, J. Agudo Canalejo, Massimiliano Marangolo, J.-Y. Duquesne

Publikováno v: Physical Review B: Condensed Matter and Materials Physics (1998-2015)
Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2012, 86 (3), ⟨10.1103/PhysRevB.86.035207⟩
Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2012, 86 (3), ⟨10.1103/PhysRevB.86.035207⟩

Mechanical control of magnetic properties in magnetostrictive thin films offers the unexplored opportunity to employ surface wave acoustics in such a way that dynamic magnetic effects are triggered. Strain-induced modulation of the magnetic anisotrop

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a4e426269212ef3853156a455c639ec
http://arxiv.org/abs/1206.5217

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