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15 results on '"Chaban, Ievgeniia"'

2. Ultrafast Structural Dynamics of a Photoexcited Mn−Fe Charge‐Transfer Material in the Polaronic and Phase Transition Regimes.

Author

Hervé, Marius, Privault, Gaël, Trzop, Elzbieta, Akagi, Shintaro, Watier, Yves, Zerdane, Serhane, Chaban, Ievgeniia, Torres Ramírez, Ricardo G., Mariette, Celine, Volte, Alix, Cammarata, Marco, Levantino, Matteo, Tokoro, Hiroko, Ohkoshi, Shin‐ichi, and Collet, Eric

Abstract

The Rb0.94Mn0.94Co0.06[Fe(CN)6]0.98 material was designed to exhibit a 75 K wide thermal hysteresis around room temperature, associated with a bistability between the low temperature MnIIIFeII tetragonal phase and the high temperature MnIIFeIII cubic phase. We have recently shown that a single laser pulse can be used to drive, at room temperature, the photoinduced phase transition from the MnIIIFeII tetragonal phase to the MnIIFeIII cubic phase. By using a specific powder sample streaming technique, we could monitor by time‐resolved X‐ray diffraction how the ultrafast out‐of‐equilibrium dynamics, imposed by the structural relaxation around the local photoinduced charge transfer, changes with the fluence of the laser pulse. In this paper we present a detailed structural analysis of the crystalline reorganizations associated with the charge‐transfer in different regimes of photoexcitation. In the low excitation polaronic regime, the photoinduced charge transfer is local and accompanied by an anisotropic distortion of the Mn coordination sphere and of the tetragonal lattice. In the high excitation regime, a macroscopic and cooperative charge‐transfer phase transition occurs towards the cubic lattice, where the coordination around the Mn reaches octahedral symmetry. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Non-reversible Photoinduced Phase Transition in the RbMnFe Prussian Blue Analogue Studied by Streaming Crystallography

Author

Hervé, Marius, Chaban, Ievgeniia, Privault, Gaël, Akagi, Shintaro, Trzop, Elzbieta, Mariette, Céline, Volte, Alix, Watier, Yves, Levantino, Matteo, Tokoro, Hiroko, Ohkoshi, Shin-Ichi, Collet, Eric, Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Université de Tsukuba = University of Tsukuba, European Synchroton Radiation Facility [Grenoble] (ESRF), European Synchrotron Radiat. Facil., Université Joseph Fourier - Grenoble 1 (UJF), The University of Tokyo (UTokyo), Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, and HERVE, Marius

Subjects
[PHYS]Physics [physics], ultrafast dynamics, time-resolved crystallography, Prussian blue analogue, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], photo-induced phase transition, [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat], [PHYS] Physics [physics], [PHYS.PHYS.PHYS-CHEM-PH] Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]
Abstract

International audience

Published
2023

6. Crystalline-like ordering of 8CB liquid crystals revealed by time-domain Brillouin scattering.

Author

Chaban, Ievgeniia, Klieber, Christoph, Busselez, Rémi, Nelson, Keith A., and Pezeril, Thomas

Subjects
*BRILLOUIN scattering, *LIQUID crystals, *SMECTIC liquid crystals, *MOLECULAR structure, *PHASE transitions
Abstract

We demonstrate that time-domain Brillouin scattering (TDBS), a technique based on an ultrafast pump-probe approach, is sensitive to phase transitions and apply it to the study of structural changes in 8CB liquid crystals at different temperatures across the isotropic, nematic, smectic, and crystalline phases. We investigate the viscoelastic properties of 8CB squeezed in a narrow gap, from the nanometer to submicrometer thickness range, and conclude on the long-range molecular structuring of the smectic phase. These TDBS results reveal that confinement effects favor structuring of the smectic phase into a crystallinelike phase that can be observed at wide distances far beyond the molecular dimensions. [ABSTRACT FROM AUTHOR]

Published
2020
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7. Ultrafast Dynamics of Non-reversible Photoinduced Phase Transition in the RbMnFe Prussian Blue Analogue Studied by Streaming Crystallography

Author

Hervé, Marius, Chaban, Ievgeniia, Privault, Gaël, Akagi, Shintaro, Trzop, Elzbieta, Mariette, Céline, Volte, Alix, Watier, Yves, Levantino, Matteo, Tokoro, Hiroko, Ohkoshi, Shin-Ichi, Collet, Eric, Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, European Synchroton Radiation Facility [Grenoble] (ESRF), and Department of Chemistry, School of science, The University of Tokyo

Subjects
[PHYS]Physics [physics], [CHIM.CRIS]Chemical Sciences/Cristallography, [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract

International audience

Published
2022

8. Controlling materials with lattice vibrations

Author

Privault, Gaël, Collet, Eric, Lorenc, Maciej, Chaban, Ievgeniia, Subedi, A, Mevellec, J, Corraze, B, Humbert, B, Janod, E, Daro, N, Chastanet, G, Institute for Physical Research (IPR), National Academy of Sciences of the Republic of Armenia [Yerevan] (NAS RA), Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux Jean Rouxel (IMN), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - Ecole Polytechnique de l'Université de Nantes (Nantes Univ - EPUN), Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and ANR-19-CE30-0004,ELECTROPHONE,Transitions de phase ELECTROnique de matériaux moleculaires controllées par PHONONIQUE non-linéaire(2019)

Subjects
[PHYS]Physics [physics], [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Abstract

National audience

Published
2021

9. Symmetry-resolved THz, IR, Raman spectroscopies and DFT studies of lattice phonon modes in the spin crossover crystal [Fe(phen)2(NCS)2]

Author

Privault, Gaël, Gournay, Lucas, Mevellec, J, Corraze, B, Chaban, Ievgeniia, Janod, E, Lorenc, Maciej, Daro, N, Chastanet, G, Humbert, B, Subedi, A, Collet, Eric, Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux Jean Rouxel (IMN), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - Ecole Polytechnique de l'Université de Nantes (Nantes Univ - EPUN), Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and ANR-19-CE30-0004,ELECTROPHONE,Transitions de phase ELECTROnique de matériaux moleculaires controllées par PHONONIQUE non-linéaire(2019)

Subjects
[PHYS]Physics [physics], [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [CHIM.CRIS]Chemical Sciences/Cristallography, [CHIM.COOR]Chemical Sciences/Coordination chemistry
Abstract

National audience

Published
2021

10. Photoinduced charge-transfer in Prussian blue analogues: from local self-trapping to macroscopic phase transition

Author

Collet, Eric, Azzolina, Giovanni, Zerdane, Serhane, Hervé, Marius, Privault, Gaël, Chaban, Ievgeniia, Bertoni, Roman, Trzop, Elzbieta, Mariette, Céline, Cailleau, Hervé, Ecolivet, Claude, Lorenc, Maciej, Cammarata, Marco, Tokoro, Hiroko, Ohkoshi, Shin-Ichi, Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Structure et dynamique multi-échelle des édifices moléculaires (DYNAMO), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut des Molécules et Matériaux du Mans (IMMM), Le Mans Université (UM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Department of Applied Chemistry, The University of Tokyo (UTokyo)-School of Engineering, The University of Tokyo (UTokyo), and Collet, Eric

Subjects
[PHYS]Physics [physics], [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM.CRIS]Chemical Sciences/Cristallography, [CHIM.MATE]Chemical Sciences/Material chemistry, [CHIM.CRIS] Chemical Sciences/Cristallography, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat], [PHYS] Physics [physics]
Abstract

International audience

Published
2021

11. Experimental and theoretical analysis of vibrational modes in Fe(phen)2(NCS)2 single crystal

Author

Privault, Gaël, Gournay, Lucas, Mevellec, J, Corraze, B, Chaban, Ievgeniia, Janod, E, Lorenc, Maciej, Daro, N, Chastanet, G, Humbert, B, Subedi, A, Collet, Eric, Institut de Physique de Rennes (IPR), Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux Jean Rouxel (IMN), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST), Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - Ecole Polytechnique de l'Université de Nantes (Nantes Univ - EPUN), Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and ANR-19-CE30-0004,ELECTROPHONE,Transitions de phase ELECTROnique de matériaux moleculaires controllées par PHONONIQUE non-linéaire(2019)

Subjects
[PHYS]Physics [physics], [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [CHIM.CRIS]Chemical Sciences/Cristallography, [CHIM.COOR]Chemical Sciences/Coordination chemistry
Abstract

National audience

Published
2021

13. The effect of substrate temperature on the critical velocity in microparticle impact bonding.

Author

Chaban, Ievgeniia, Sun, Yuchen, Veysset, David, Nelson, Keith A., and Schuh, Christopher A.

Subjects
*CRITICAL velocity, *CRITICAL temperature, *TEMPERATURE effect, *COATING processes, *METAL spraying
Abstract

A number of nascent coating and micromanufacturing processes involve particles sprayed at a high velocity, which impact a substrate, deform, and adhere. Successful bonding between the particles and the substrate requires impact velocities higher than the so-called critical adhesion velocity. This critical velocity is influenced by the temperature of the substrate, a variable that we isolate in this work by conducting single-particle impacts on a variable-temperature substrate for three systems (Al–Al, Sn–Sn, and Ti–Ti) with particles individually selected within a narrow size distribution. Our results quantitatively connect the increase in substrate temperature to a significant lowering of the critical velocity, which we attribute to the lower dynamic strength of the thermally softened substrate. The data are generally consistent with expectations for bonding being controlled by a hydrodynamic process of jetting upon impact. [ABSTRACT FROM AUTHOR]

Published
2021
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14. Time-domain Brillouin scattering for the determination of laser-induced temperature gradients in liquids.

Author

Chaban, Ievgeniia, Shin, Hyun D., Klieber, Christoph, Busselez, Rémi, Gusev, Vitalyi E., Nelson, Keith A., and Pezeril, Thomas

Subjects
*BRILLOUIN scattering, *THERMAL lensing, *MIE scattering, *TRANSDUCERS, *ELECTROMECHANICAL devices
Abstract

We present an optical technique based on ultrafast photoacoustics to determine the local temperature distribution profile in liquid samples in contact with a laser heated optical transducer. This ultrafast pump-probe experiment uses time-domain Brillouin scattering (TDBS) to locally determine the light scattering frequency shift. As the temperature influences the Brillouin scattering frequency, the TDBS signal probes the local laser-induced temperature distribution in the liquid. We demonstrate the relevance and the sensitivity of this technique for the measurement of the absolute laser-induced temperature gradient of a glass forming liquid prototype, glycerol, at different laser pump powers— i.e., different steady state background temperatures. Complementarily, our experiments illustrate how this TDBS technique can be applied to measure thermal diffusion in complex multilayer systems in contact with a surrounding liquid. [ABSTRACT FROM AUTHOR]

Published
2017
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