Zobrazeno 1 - 10
of 200
pro vyhledávání: '"De Brion, S"'
Autor:
Alexanian, Y., Saugnier, J., Decorse, C., Robert, J., Ballou, R., Lhotel, E., Debray, J., Gay, F., Simonet, V., de Brion, S.
The possibilities of combining several degrees of freedom inside a unique material have recently been highlighted in their dynamics and proposed as information carriers in quantum devices where their cross-manipulation by external parameters such as
Externí odkaz:
http://arxiv.org/abs/2402.05260
Autor:
Alexanian, Y., Lhotel, E., Ballou, R., Colin, C. V., Klein, H., Priol, A. Le, Museur, F., Robert, J., Pachoud, E., Lejay, P., Hadj-Azzem, A., Fåk, B., Berrod, Q., Zanotti, J. -M., Suard, E., Dejoie, C., de Brion, S., Simonet, V.
Geometrical frustration, as in pyrochlore lattices made of corner-sharing tetrahedra, precludes the onset of conventional magnetic ordering, enabling the stabilization of fluctuating spin states at low temperature. Disorder is a subtle ingredient tha
Externí odkaz:
http://arxiv.org/abs/2303.05483
Autor:
Amelin, K., Alexanian, Y., Nagel, U., Room, T., Robert, J., Debray, J., Simonet, V., Decorse, C., Wang, Z., Ballou, R., Constable, E., de Brion, S.
The significance of spin-lattice coupling in the phase diagram of the quantum spin-icepyrochlore Tb2Ti2O7 has been a topic of debate for some time. Here, we focus on the aspect of vibronic coupling, which occurs between the Tb3+ electronic levels and
Externí odkaz:
http://arxiv.org/abs/2009.10545
Autor:
Fabreges, X., Petit, S., Brubach, J. B., Roy, P., Deutsch, M., Ivanov, A., Pinsard-Gaudart, L., Simonet, V., Ballou, R., de Brion, S.
Publikováno v:
Phys. Rev. B 100, 094437 (2019)
In the multiferroic hexagonal manganite HoMnO3, inelastic neutron scattering and synchrotron based THz spectroscopy have been used to investigate the spin waves associated to the Mn order together with Ho crystal field excitations. While the Mn order
Externí odkaz:
http://arxiv.org/abs/1903.03009
Autor:
Ramakrishnan, M., Constable, E., Cano, A., Mostovoy, M., White, J. S., Gurung, N., Schierle, E., de Brion, S., Colin, C. V., Gay, F., Lejay, P., Ressouche, E., Weschke, E., Scagnoli, V., Ballou, R., Simonet, V., Staub, U.
We report the direct observation of a magnetic-feld induced long-wavelength spin spiral modulation in the chiral compound Ba3TaFe3Si2O14. This new spin texture emerges out of a chiral helical ground state, and is hallmarked by the onset of a unique c
Externí odkaz:
http://arxiv.org/abs/1810.02656
Autor:
Fabrèges, X., Ressouche, E., Duc, F., de Brion, S., Amara, M., Detlefs, C., Paolasini, L., Suard, E., Regnault, L. -P., Canals, B., Strobel, P., Simonet, V.
Publikováno v:
Phys. Rev. B 95, 014428 (2017)
In the spinel compound GeCo$_2$O$_4$, the Co$^{2+}$ pyrochlore sublattice presents remarkable magnetic field-induced behaviors that we unveil through neutron and X-ray single-crystal diffraction. The N\'eel ordered magnetic phase is entered through a
Externí odkaz:
http://arxiv.org/abs/1609.08805
Autor:
Toulouse, C, Cazayous, M, De Brion, S, Levy-Bertrand, F, Barkaoui, H, Lejay, P, Chaix, L, Lepetit, M. B., Brubach, J. B., Roy, P
The chiral langasite Ba$\_3$NbFe$\_3$Si$\_2$O$\_{14}$ is a multiferroic compound. While its magnetic order below T$\_N$=27 K is now well characterised, its polar order is still controversial. We thus looked at the phonon spectrum and its temperature
Externí odkaz:
http://arxiv.org/abs/1508.06090
Autor:
Toulouse, C., Chaix, L., Liu, J., Gallais, Y., Measson, M-A., Sacuto, A., Pinsard-Godart, L., Willaert, F., Brubach, J. B., Roy, P., Petit, S., Simonet, V., de Brion, S., Cazayous, M.
Publikováno v:
Physical Review B 89, 094415 (2014)
We used Raman and terahertz spectroscopies to investigate lattice and magnetic excitations and their cross-coupling in the hexagonal YMnO3 multiferroic. Two phonon modes are strongly affected by the magnetic order. Magnon excitations have been identi
Externí odkaz:
http://arxiv.org/abs/1402.7239
Autor:
Silva, N. J. O., Amaral, V. S., Urtizberea, A., Bustamante, R., Millán, A., Palacio, F., Kampert, E., Zeitler, U., de Brion, S., Iglesias, Òscar, Labarta, Amílcar
We show that the coercive field in ferritin and ferrihydrite depends on the maximum magnetic field in a hysteresis loop and that coercivity and loop shifts depend both on the maximum and cooling fields. In the case of ferritin we show that the time d
Externí odkaz:
http://arxiv.org/abs/1011.4737
Publikováno v:
Phys. Rev. B 78, 184410 (2008)
SrEr$_2$O$_4$ has been characterised by low-temperature powder neutron diffraction, as well as single crystal specific heat and magnetisation measurements. Magnetisation measurements show that the magnetic system is highly anisotropic at temperature
Externí odkaz:
http://arxiv.org/abs/0808.2675