Features of the Low-Temperature Heat Capacity of Er3 –xTmxAl5O12 Garnet Single Crystals
- Авторлар: Charnaya E.V.1, Shevchenko E.V.1, Khazanov E.N.2, Taranov A.V.2, Ulyashev A.M.3
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Мекемелер:
- St. Petersburg State University
- Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences
- Sorokin Syktyvkar State University
- Шығарылым: Том 64, № 8 (2019)
- Беттер: 811-817
- Бөлім: Novel Radio Systems and Elements
- URL: https://journals.rcsi.science/1064-2269/article/view/201009
- DOI: https://doi.org/10.1134/S1064226919070064
- ID: 201009
Дәйексөз келтіру
Аннотация
In this paper, we present the results of studies of the heat capacity of single-crystal garnets Er3 ‒ xTmxAl5O12 (x = 0, 1, 2, 3) in magnetic fields of up to 9 T and in the temperature range 1.9–220 K. The temperature dependences of the heat capacity are approximated using the sum of the contributions of Schottky anomalies associated with magnetic Er3+ and Tm3+ ions and the Debye and Einstein lattice contributions. Entropy and magnetic entropy are calculated using the heat capacity data. With an increase in the magnetic field, entropy is shown to decrease. This indicates the possibility of using the studied garnets in the adiabatic demagnetization method.
Авторлар туралы
E. Charnaya
St. Petersburg State University
Хат алмасуға жауапты Автор.
Email: charnaya@mail.ru
Ресей, St. Petersburg, 198504
E. Shevchenko
St. Petersburg State University
Email: khazanov@cplire.ru
Ресей, St. Petersburg, 198504
E. Khazanov
Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences
Хат алмасуға жауапты Автор.
Email: khazanov@cplire.ru
Ресей, Moscow, 125009
A. Taranov
Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences
Email: khazanov@cplire.ru
Ресей, Moscow, 125009
A. Ulyashev
Sorokin Syktyvkar State University
Email: khazanov@cplire.ru
Ресей, Syktyvkar, 167001
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