HYPERSOUND STUDIES OF THE ELECTRON DOPED LN2-XCEXCUO4 AND HOLE DOPED LA2-XMXCUO4 HIGH-TC SINGLE-CRYSTALSстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Here we report the growth of the electron doped HTSC Ln2-xCexCuO4(Ln = Gd, Eu, Nd, Pr; x = 0, 0.15) single crystals and room temperature measurements of their hypersound surface acoustic wave (SAW) velocities V(SAW). Mandelstamm-Brillouin light scattering was used to the determination of the V(SAW) values in (001) crystal planes. SAW velocities of the hole doped La2-xMxCuO4 (M = Ca, Sr, Ba;O less-than-or-equal-to x less-than-or-equal-to 0.15) crystals were also measured. For both type of crystals V(SAW) is constant for all the azimuths of the SAW vector in the (001) plane. In the case of Ln2-xCexCuO4 crystals the V(SAW) value rises almost-equal-to 20% with the Ln radii increase from Gd to Pr.