Výsledky vyhledávání

Akademický článek

Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.

Report

Cs2NaAl1-xCrxF6: A family of compounds presenting magnetocaloric effect

Autor: Pedro, S. S., Tedesco, J. C. G., Yokaichiya, F., Brandão, P., Gomes, A. M., Landgesell, S., Pires, M. J. M., Sosman, L. P., Mansanares, A. M., Reis, M., Bordallo, H. N.

In this paper we explore the magnetocaloric effect (MCE) of chromium-doped elpasolite Cs$_2$NaAl$_{1-x}$Cr$_x$F$_6$ (x = 0.01 and 0.62) single crystals. Our magnetization and heat capacity data show the magnetocaloric potentials to be comparable to t

Externí odkaz: http://arxiv.org/abs/1312.3014

Zobrazit plný text záznamu

Report

Spin-driven Phase Transitions in ZnCr$_2$Se$_4$ and ZnCr$_2$S$_4$ Probed by High Resolution Synchrotron X-ray and Neutron Powder Diffraction

Autor: Yokaichiya, F., Krimmel, A., Tsurkan, V., Margiolaki, I., Thompson, P., Bordallo, H. N., Buchsteiner, A., Stüßer, N., Argyriou, D. N., Loidl, A.

The crystal and magnetic structures of the spinel compounds ZnCr$_2$S$_4$ and ZnCr$_2$Se$_4$ were investigated by high resolution powder synchrotron and neutron diffraction. ZnCr$_2$Se$_4$ exhibits a first order phase transition at $T_N=21$ K into an

Externí odkaz: http://arxiv.org/abs/0811.3084

Zobrazit plný text záznamu

Report

Glass Transition in the Polaron Dynamics of CMR Manganites

Autor: Argyriou, D. N., Lynn, J. W., Osborn, R., Campbell, B., Mitchell, J. F., Ruett, U., Bordallo, H. N., Wildes, A., Ling, C. D.

Neutron scattering measurements on a bilayer manganite near optimal doping show that the short-range polarons correlations are completely dynamic at high T, but then freeze upon cooling to a temperature T* 310 K. This glass transition suggests that t

Externí odkaz: http://arxiv.org/abs/cond-mat/0205148

Zobrazit plný text záznamu

Report

Interplay of spin and orbital ordering in the layered colossal magnetoresistance manganite La2-2xSr1+2xMn2O7 (0.5<=x<=1.0)

Autor: Ling, C. D., Millburn, J. E., Mitchell, J. F., Linton, D. N. Argyriou J., Bordallo, H. N.

The crystallographic and magnetic phase diagram of the n=2 layered manganite La2-2xSr1+2xMn2O7 in the region x=>0.5 has been studied using temperature dependent neutron powder diffraction. The magnetic phase diagram reveals a progression of ordered m

Externí odkaz: http://arxiv.org/abs/cond-mat/0007253

Zobrazit plný text záznamu

Report

Lattice Displacements Above Tc in the Layered Manganite La1.2Sr1.8Mn2O7

Autor: Argyriou, D. N., Bordallo, H. N., Mitchell, J. F., Jorgensen, J. D., Strouce, G. F.

Neutron diffraction data presented in this paper demonstrates the relevance of lattice displacement above TC, in our understanding of the evolution of the crystal structure with temperature in the layered CMR manganite La1.2Sr1.8Mn2O7. The anomalous

Externí odkaz: http://arxiv.org/abs/cond-mat/9904045

Zobrazit plný text záznamu