Вид документа : Статья из журнала Шифр издания : 54/M 17 Автор(ы) : Samokhvalov A. A., Arbuzova T. I., Viglin N. A., Osipov V. V., Solin N. I., Naumov S. V., Bamburov V. G., Lobachevskaya N. I., Reznitskikh O. G. Заглавие : Magnetic and electrical properties of Mg12xCuxO solid solutions and magnetic shielding in Cu–Mg12xCuxO structures Место публикации : Physics of the Solid State. - 1999. - Vol. 41, № 2. - С. 262-264: il. Примечания : Bibliogr. : p. 264 (7 ref.) ISSN: 1063-7834 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Ключевые слова (''Своб.индексиров.''): сверхпроводники--оксикупрат магния--электропроводность Аннотация: Mg12xCuxO solid solutions having an NaCl structure with 0x0.20 are synthesized andCu–Mg12xCuxO structures are prepared for superconductivity studies. The magnetic susceptibility x, electron paramagnetic resonance ~EPR!, and electrical conductivity of the solid solutions are studied at temperatures of 5–550 K. It is shown that x21(T) obeys the Curie–Weiss law with a paramagnetic Curie temperature Q close to zero and an effective magnetic moment meff 51.9mB , close to the 1.73mB of a Cu21 ion with spin S51/2. The width DH of the EPR line depends weakly on temperature and increases as x is raised. The volume narrowing of the EPR linewidth DH is used to estimate the exchange interaction parameter, 331024 eV. The g-factor is close to 2 and is temperature independent. The electrical conductivity of Mg12xCuxO at T5300 K is '10211210212V21cm21 for x50 and increases to 1025 21026V21cm21 for x50.1520.20. The conductivity is p-type. Magnetic shielding is observed in Cu–Mg12xCuxO structures with x50.15 and 0.20. The possible connection of this phenomenon with interference superconductivity in the contact layer of the structure is discussed Доп.точки доступа: Samokhvalov, A. A.; Arbuzova, T. I.; Viglin, N. A.; Osipov, V. V.; Solin, N. I.; Naumov, S. V.; Bamburov, V. G.; Бамбуров Виталий Григорьевич; Lobachevskaya, N. I.; Лобачевская Нина Ивановна; Reznitskikh, O. G.