Z 18 Electrical resistance and magnetic properties of double-doped ceramics La1.85-4/3xSr0.15+4/3xCu1-xMnxO4 [Text] / A. V. Tkach, A. I. Ponomarev, T. B. Charikova, A. O. Tashlykov, V. L. Kozhevnikov // Low Temperature Physics. - 2007. - Vol. 33, № 2-3. - P257-263. - Библиогр. : с. 263 (23 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КЕРАМИКА ЛАНТАН-СТРОНЦИЕВАЯ -- ЭЛЕКТРОСОПРОТИВЛЕНИЕ -- МАГНИТНЫЕ СВОЙСТВА Аннотация: Resistive and magnetic measurements are made on La1.85−4/3xSr0.15+4/3xCu1−xMnxO4 ceramics with x=0.02, 0.04, 0.06, and 0.08. It is found that at these concentrations the temperature of the beginning and end of the superconducting transition depend weakly on the concentration x. The resistive properties exhibit a combination of metallic conductivity (or superconductivity) along the grains with hopping transport between grains. At low temperatures the superconductivity apparently coexists with two different magnetic phases Полный текст |