Zobrazeno 1 - 10
of 92
pro vyhledávání: '"Rovillain, P."'
Autor:
Rovillain, Pauline, Duquesne, Jean-Yves, Christienne, Louis, Eddrief, Mahmoud, Pini, Maria Gloria, Rettori, Angelo, Tacchi, Silvia, Marangolo, Massimiliano
Publikováno v:
Phys. Rev. Applied 18, 064043 (2022)
The dependence of the velocity of surface acoustic wave (SAW) as a function of an external applied magnetic field is investigated in a Fe thin film epitaxially grown on a piezoelectric GaAs substrate. The SAW velocity is observed to strongly depend o
Externí odkaz:
http://arxiv.org/abs/2203.10994
Autor:
Hemme, Pierre, Djemia, Philippe, Rovillain, Pauline, Gallais, Yann, Sacuto, Alain, Forget, Anne, Colson, Dorothée, Charron, Eric, Perrin, Bernard, Belliard, Laurent, Cazayous, Maximilien
Publikováno v:
J. Phys.: Condens. Matter 33, 495402 (2021)
Time resolved pump and probe acoustics and first-principles calculations were employed to assess elastic properties of the TbMnO3 perovskite manganite having orthorhombic symmetry. Measuring sound velocities of bulk longitudinal and shear acoustic wa
Externí odkaz:
http://arxiv.org/abs/2109.15023
Autor:
Narayanan, N., Graham, P. J., Rovillain, P., O'Brien, J., Bertinshaw, J., Yick, S., Hester, J., Maljuk, A., Souptel, D., Büchner, B., Argyriou, D., Ulrich, C.
The precise crystal symmetry and hence the emergence of the electric polarization still remains an open question in the multiferroic materials $R$Mn$_2$O$_5$ ($R$ = rare-earth, Bi, Y). While previous diffraction studies have indicated that $R$Mn$_2$O
Externí odkaz:
http://arxiv.org/abs/2109.05164
Autor:
Hemme, Pierre, Djemia, Philippe, Rovillain, Pauline, Gallais, Yann, Sacuto, Alain, Forget, Anne, Colson, Dorothee, Charron, Eric, Perrin, Bernard, Belliard, Laurent, Cazayous, Maximilien
Publikováno v:
Appl. Phys. Lett. 118, 062902 (2021)
We have performed elasticity measurements in the bulk multiferroic BiFeO3 (BFO) using acoustical pump and probe spectroscopy. The sound velocities of the (quasi)-longitudinal and of the two (quasi)-transverse acoustic waves along three independent di
Externí odkaz:
http://arxiv.org/abs/2102.05580
Publikováno v:
Physical Review B 102, 184409 (2020)
We present spin pumping experiments in Co/Pt bilayers grown on Al2O3(0001) and on ferroelectric Y-cut LiNbO3 substrates. Spin pumping is triggered by resonant ferromagnetic resonance induced by surface acoustic waves. We observe that spin pumping eff
Externí odkaz:
http://arxiv.org/abs/2011.06872
Autor:
Agbelele, A., Sando, D., Toulouse, C., Paillard, C., Johnson, R. D., Ruffer, R., Popkov, A. F., Carretero, C., Rovillain, P., Breton, J. -M. Le, Dkhil, B., Cazayous, M., Gallais, Y., Measson, M. -A., Sacuto, A., Manuel, P., Zvezdin, A. K., Barthelemy, A., Juraszek, J., Bibes, M.
Publikováno v:
Adv. Mater. 29, 1602327 (2017)
The magnetic-field-dependent spin ordering of strained BiFeO3 films is determined using nuclear resonant scattering and Raman spectroscopy. The critical field required to destroy the cycloidal modulation of the Fe spins is found to be significantly l
Externí odkaz:
http://arxiv.org/abs/1708.09183
Strong reduction of the coercivity by a surface acoustic wave in an out-of-plane magnetized epilayer
Autor:
Thevenard, Laura, Camara, Ibrahima Sock, Prieur, Jean-Yves, Rovillain, Pauline, Lemaître, Aristide, Gourdon, Catherine, Duquesne, Jean-Yves
Publikováno v:
Phys. Rev. B 93, 140405 (2016)
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 acoustic waves (SAWs). Hence SA
Externí odkaz:
http://arxiv.org/abs/1602.09064
Autor:
Liu, J., Toulouse, C., Rovillain, P., Cazayous, M., Gallais, Y., Measson, M. -A., Cheong, S. W., Lee, N., Sacuto, A.
Publikováno v:
Phys. Rev. B 86, 184410 (2012)
Lattice and spin excitations have been studied by Raman scattering in hexagonal YbMnO3 single crystals. The temperature dependences of the phonon modes show that the E2 mode at 256 cm-1 related to the displacement of Mn and O ions in a-b plane is cou
Externí odkaz:
http://arxiv.org/abs/1211.1540
Publikováno v:
Phys. Rev. B 86, 014437 (2012)
We have performed Raman measurements on TbMnO3 single crystal under magnetic field along the three crystallographic directions. The flip of the spin spiral plane creates an electromagnon excitation. In addition to the electromagnons induced by the He
Externí odkaz:
http://arxiv.org/abs/1207.5566
Autor:
Rovillain, P., Cazayous, M., Gallais, Y., Measson, M-A., Sacuto, A., Sakata, H., Mochizuki, M.
Publikováno v:
Phys. Rev. Lett. 107, 027202 (2011)
We have studied the impact of the magnetic field on the electromagnon excitations in TbMnO3 crystal. Applying magnetic field along the c axis, we show that the electromagnons transform into pure antiferromagnetic modes, losing their polar character.
Externí odkaz:
http://arxiv.org/abs/1107.0593