Zobrazeno 1 - 10
of 176
pro vyhledávání: '"Gvasaliya, S. N."'
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
Publikováno v:
Phys. Rev. B 86, 214408 (2012)
We present results of inelastic neutron scattering study on two bond disordered quasi twodimensional quantum magnets (C$_4$H$_12$N$_2$)Cu$_2$(Cl$_{1-x}$Br$_x$)$_6$ with x=0.035 and 0.075. We observe the increase of spin gap, reduction of magnon bandw
Externí odkaz:
http://arxiv.org/abs/1210.5899
Autor:
Bendele, M., Maisuradze, A., Roessli, B., Gvasaliya, S. N., Pomjakushina, E., Weyeneth, S., Conder, K., Keller, H., Khasanov, R.
Publikováno v:
Phys. Rev. B 87, 060409(R) (2013)
The magnetic properties of Fe1.03Te under hydrostatic pressure up to p ~ 5.7 GPa were investigated by means of muon spin rotation, dc magnetization, and neutron depolarization measurements. With increasing pressure the antiferromagnetic ordering temp
Externí odkaz:
http://arxiv.org/abs/1209.0383
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:
Hüvonen, D., Zhao, S., Månsson, M., Yankova, T., Ressouche, E., Niedermayer, C., Laver, M., Gvasaliya, S. N., Zheludev, A.
Publikováno v:
Phys. Rev. B 85, 100410(R) (2012)
Neutron diffraction and calorimetric measurements are used to study the field-induced quantum phase transition in piperazinium-Cu$_2$(Cl$_{1-x}$Br$_x$)$_6$ ($x=0$, x=3.5% and x=7.5%), a prototypical quantum antiferromagnet with random bonds. The crit
Externí odkaz:
http://arxiv.org/abs/1201.6143
Autor:
Pfuner, F. S., Gvasaliya, S. N., Zaharko, O., Keller, L., Mesot, J., Pomjakushin, V., Chu, J. -H., Fisher, I. R., Degiorgi, L.
Publikováno v:
J. Phys.: Condens. Matter 24 (2012) 036001
We report a neutron diffraction study of the magnetic phase transitions in the charge-density-wave (CDW) TbTe$_3$ compound. We discover that in the paramagnetic phase there are strong 2D-like magnetic correlations, consistent with the pronounced anis
Externí odkaz:
http://arxiv.org/abs/1110.4072
Neutron diffraction is used to re-investigate the magnetic phase diagram of the noncentrosymmetric tetragonal antiferromagnet Ba2CuGe2O7. A novel incommensurate double-k magnetic phase is detected near the commensurate-incommensurate phase transition
Externí odkaz:
http://arxiv.org/abs/1108.0432