Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Sheptyakov, D V"'
Autor:
Ali, N. Z., Williams, R. C., Xiao, F., Clark, S. J., Lancaster, T., Blundell, S. J., Sheptyakov, D. V., Jansen, M.
We have investigated the structural and magnetic transitions in CsCoO$_2$ using calorimetric measurements, neutron powder diffraction (NPD), density functional theory (DFT) calculations and muon-spin relaxation ($\mu$SR) measurements. CsCoO$_2$ exhib
Externí odkaz:
http://arxiv.org/abs/1410.3686
Publikováno v:
Physical Review B 86, 014433 (2012)
The low-temperature crystal structure of BaCuSi2O6 has been investigated with high-resolution synchrotron x-ray and neutron powder diffraction techniques and has been found to be on average (ignoring the incommensurate modulation) orthorhombic, with
Externí odkaz:
http://arxiv.org/abs/1208.4499
Autor:
Pomjakushin, V. Yu., Sheptyakov, D. V., Pomjakushina, E. V., Krzton-Maziopa, A., Conder, K., Chernyshov, D., Svitlyk, V., Shermadini, Z.
Publikováno v:
Physical Review B 83, 144410 (2011)
Neutron and x-ray powder and single crystal synchrotron diffraction of CsyFe2-xSe2 show the presence of superstructure reflections with propagation vector k=[2/5, 1/5, 1] with respect to the average crystal structure I4/mmm (a = 4, c = 15A). The prop
Externí odkaz:
http://arxiv.org/abs/1102.1919
Publikováno v:
JOURNAL OF PHYSICS-CONDENSED MATTER 22, 115601 (2010)
High resolution neutron diffraction shows that the mesoscopic separation into ferromagnetic (FM) and antiferromagnetic (AFM) phases and the FM transition temperature T_C in the perovskite manganite (La_{1-y}Pr_{y})_{0.7}Ca_{0.3}MnO_3 strongly depend
Externí odkaz:
http://arxiv.org/abs/0912.0155
Autor:
Krimmel, A., Günther, A., Kraetschmer, W., Dekinger, H., Büttgen, N., Eyert, V., Loidl, A., Sheptyakov, D. V., Scheidt, E. -W., Scherer, W.
Publikováno v:
Phys. Rev. B Vol. 80, 121101(R) (2009)
The transition--metal oxide CaCu$_3$Ru$_4$O$_{12}$ with perovskite--type structure shows characteristic properties of an intermediate--valence system. The temperature--dependent susceptibility exhibits a broad maximum around $150 - 160$ K. At this te
Externí odkaz:
http://arxiv.org/abs/0909.4208
Autor:
Rasch, J. C. E., Sheptyakov, D. V., Schefer, J., Keller, L., Böhm, M., Gozzo, F., Volkov, N. V., Sablina, K. A., Petrakovskii, G. A., Grimmer, H., Conder, K., Löffler, J. F.
Publikováno v:
J. Solid State Chem. 182, 1188 (2009)
We report on the crystallographic structure of the layered compound Pb3Mn7O15. Previous analysis based on laboratory X-ray data at room temperature gave contradictory results in terms of the description of the unit cell. Motivated by recent magnetic
Externí odkaz:
http://arxiv.org/abs/0810.5296
Publikováno v:
PHYSICAL REVIEW B 76, 174433 (2007)
Crystal and magnetic structures of a series of novel quantum spin trimer system Ca3Cu3xNix(PO4)4 (x=0,1,2) were studied by neutron powder diffraction at the temperatures 1.5-290 K. The composition with one Ni per trimer (x=1) has a monoclinic structu
Externí odkaz:
http://arxiv.org/abs/0709.2250
Publikováno v:
Phys. Rev. B 75, 054410 (2007)
The crystal and magnetic structures of the specified CMR manganite system have been studied as a function of $y=(0.2-1)$ across the metal-insulator (MI) transition, and of the oxygen mass ($^{16}$O, $^{18}$O). We quantitatively show how the polaronic
Externí odkaz:
http://arxiv.org/abs/cond-mat/0701244
Autor:
Troyanchuk, I. O., Bushinsky, M. V., Nikitin, A. V., Lobanovsky, L. S., Balagurov, A. M., Sikolenko, V., Efimov, V., Sheptyakov, D. V.
Publikováno v:
Journal of Applied Physics; Feb2013, Vol. 113 Issue 5, p053909, 8p, 1 Chart, 10 Graphs
Autor:
Mogare, K. M.1, Sheptyakov, D. V.2, Bircher, R.3, Güdel, H.-U.3, Jansen, M.1 Jansen@krf.mpg.de
Publikováno v:
European Physical Journal B: Condensed Matter. Aug2006, Vol. 52 Issue 3, p371-376. 6p. 2 Diagrams, 1 Chart, 6 Graphs.