Low-temperature behavior of specific heat curves in ruthenocurate RuSr[2]Gd[1. 5]Ce[0. 5]Cu[2]O[ (10-дельта) ]: superconducting, magnetic and crossing-point effects [Text] / B. I. Belevtsev [и др. ] // Известия РАН. Серия физическая. - 2010. - Т. 74, N 8. - С. 1098-1101. . - Библиогр.: c. 1101 (9 назв. )
Рубрики: Физика Общие вопросы физики Химическая технология Общие вопросы химической технологии Кл.слова (ненормированные): аномалия Шоттки -- магнитные свойства -- намагниченность -- поликристаллические образцы -- сверхпроводящие свойства -- удельная теплоемкость -- Шоттки аномалия Аннотация: Magnetic and superconducting properties of polycrystalline samples of RuSr[2]Gd[1. 5]Ce[0. 5]Cu[2]O (10-дельта), as-prepared (by solid-state reaction) and annealed in pure oxygen at different pressure are presented. Specific heat and magnetization were investigated in the temperature range 1. 8-300 K with a magnetic field up to 8 T. Specific heat, C (T), shows a jump at the superconducting transition (with onset at T~37. 5 K) and a Schottky-type anomaly below 20 K. It is found that curves C (T) taken for different values of magnetic field have the same crossing point (at T[*]~ 2. 7 K) for all samples studied. At the same time, C (H) curves taken for different temperatures have a crossing point at a characteristic field H[*]~2. 7 T. These effects are manifestations of the crossing-point phenomenon, which is supposed to be inherent for strongly correlated electron systems. Доп.точки доступа: Belevtsev, B. I.; Krasovitsky, V. B.; Naugle, D. G.; Rathnayaka, K. D. D.; Agnolet, Glenn; Felner, I. Имеются экземпляры в отделах: всего 1 : ч.з. (1) Свободны: ч.з. (1) |