/ K. A. Shaykhutdinov [et al.]> // JETP Letters. - 2010. -
Vol. 92,
Is. 5. - P. 332-337,
DOI 10.1134/S0021364010170133. - Cited References: 8. - The work was supported by the Siberian Branch, Russian Academy of Sciences (project no. 53, the Interdisciplinary Integration Program), by the Russian Foundation for Basic Research (project no. 10-02-00251), and by the Ministry of Education and Science of the Russian Federation (program "Scientific and Pedagogical Personnel of Innovative Russia" for 2009-2013). A.D.F. acknowledges the support of the Siberian Branch, Russian Academy of Sciences, provided in the framework of the Lavrent'ev Competition of the projects submitted by young researchers.
. - ISSN 0021-3640
РУБ Physics, Multidisciplinary
Аннотация: The behavior of the low-temperature specific heat C(T) for YBa2Cu3O6 + x single crystals with the doping level corresponding to the normal phase has been studied by the relaxation technique at different values of the applied magnetic field. It has been found that the C(T)/T plot exhibits such an anomaly as a steep increase with decreasing temperature from T about 4 K down to T a parts per thousand currency sign 2 K (the minimum temperature value accessible in the experiment). The applied magnetic field as high as 9 T inverts this anomaly and leads to a sharp drop in C(T)/T during cooling within the same temperature range. A model involving the Schottky-type centers formulated in this work and the data on spin correlation functions has allowed us to calculate the temperature dependence of the specific heat, which fits the experimental curves quite well.
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Держатели документа: [Shaykhutdinov, K. A.
Popkov, S. I.
Val'kov, V. V.
Dzebisashvili, D. M.
Fedoseev, A. D.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Lavrov, A. N.
Kozeeva, L. P.
Kameneva, M. Yu.] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, Novosibirsk 630090, Russia
[Val'kov, V. V.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent'eva 3, Novosibirsk 630090, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation
Доп.точки доступа: Shaykhutdinov, K. A.; Шайхутдинов, Кирилл Александрович; Popkov, S. I.; Попков, Сергей Иванович; Lavrov, A. N.; Kozeeva, L. P.; Kameneva, M. Y.; Val'kov, V. V.; Вальков, Валерий Владимирович; Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Fedoseev, A. D.;
Федосеев,
Александр Дмитриевич