Zobrazeno 1 - 10
of 203
pro vyhledávání: '"Lushnikov, S G"'
Autor:
Chillal, S., Gvasaliya, S. N., Schroeter, D., Kraken, M., Litterst, F. J., Shaplygina, T. A., Lushnikov, S. G., Zheludev, A.
PbFe$_{1/2}$Ta$_{1/2}$O$_{3}$ (PFT) belongs to the family of PbB$'_{x}$B$"_{1-x}$O$_{3}$ which have inherent chemical disorder at the B-site. Due to this disorder, a complex magnetic phase diagram is expected in the material. In this paper, we report
Externí odkaz:
http://arxiv.org/abs/1402.2914
Autor:
Chillal, S., Thede, M., Litterst, F. J., Gvasaliya, S. N., Shaplygina, T. A., Lushnikov, S. G., Zheludev, A.
Publikováno v:
Phys. Rev B 87, 220403(R) (2013)
The disordered antiferromagnet \pfn (\pfns) is investigated in a wide temperature range by combining M\"ossbauer spectroscopy and neutron diffraction experiments. It is demonstrated that the magnetic ground state is a {\it microscopic} coexistence of
Externí odkaz:
http://arxiv.org/abs/1211.4203
We report a neutron scattering study of a ferroelectric phase transition in Sr$_{0.61}$Ba$_{0.39}$Nb$_2$O$_6$ (SBN-61). The ferroelectric polarization is along the crystallographic $c$-axis but the transverse acoustic branch propagating along the $<$
Externí odkaz:
http://arxiv.org/abs/1206.2012
Autor:
Cervellino, A., Gvasaliya, S. N., Roessli, B., Rotaru, G. M., Cowley, R. A., Lushnikov, S. G., Shaplygina, T. A., Bouchenoire, L.
The structure of BaMg1/3Ta2/3O3 (BMT) has been studied using X-ray scattering. The phonons have been measured and the results are similar to those of other materials with the perovskite structure such as PbMg1/3Nb2/3O3 (PMN). The acoustic and lowest
Externí odkaz:
http://arxiv.org/abs/1204.4273
Autor:
Cervellino, A., Gvasaliya, S. N., Roessli, B., Rotaru, G. M., Cowley, R. A., Lushnikov, S. G., Shaplygina, T. A., Bossak, A., Chernyshov, D.
A quite unusual diffuse scattering phenomenology was observed in the single-crystal X-ray diffraction pattern of cubic perovskite BMT ($\mathrm{BaMg}_{1/3}\mathrm{Ta}_{2/3}\mathrm{O}_3$). The intensity of the scattering is parametrized as a set of cu
Externí odkaz:
http://arxiv.org/abs/1204.4303
Autor:
Rotaru, G -M, Padmanabhan, B, Gvasaliya, S N, Roessli, B, Strassle, Th, Cowley, R A, Lushnikov, S G, Klotz, S
We report measurements of the evolution of the diffuse scattering in a single crystal PbMg1/3Nb2/3O3 as a function of hydrostatic pressure. Upon applying pressure the diffuse scattering intensity decreases and is suppressed at about 3 GPa, while no c
Externí odkaz:
http://arxiv.org/abs/0910.2108
Autor:
Cervellino, A., Gvasaliya, S. N., Zaharko, O., Roessli, B., Rotaru, G. M., Cowley, R. A., Lushnikov, S. G., Shaplygina, T. A., Fernandez-Diaz, M. -T.
The relaxor ferroelectric PbMg_1/3Ta_2/3O_3 was studied by single-crystal neutron and synchrotron x-ray diffraction and its detailed atomic structure has been modeled in terms of static Pb-displacements that lead to the formation of polar nanoregions
Externí odkaz:
http://arxiv.org/abs/0908.2920
Autor:
Rotaru, G. -M., Roessli, B., Amato, A., Gvasaliya, S. N., Mudry, C., Lushnikov, S. G., Shaplygina, T. A.
Publikováno v:
Phys. Rev. B 79, 184430 (2009)
We have investigated the magnetic ground-state of the multiferroic relaxor ferroelectric \pfn with $\mu$SR spectroscopy and neutron scattering. We find that a transition to a partially disordered phase occurs below T=20 K that coexists with long-rang
Externí odkaz:
http://arxiv.org/abs/0901.1816
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We show that the neutron diffuse scattering in relaxor ferroelectric (1-x)PbZn$_{1/3}$Nb$_{2/3}$O$_{3}$ - x PbTiO$_{3}$ (x=0.07) consists of two components. The first component is strictly elastic but extended in q-space and grows below 600 K. The se
Externí odkaz:
http://arxiv.org/abs/0805.2908