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Raoufi, Tina, Shokrian, Fatemeh. (1400). Study of Landau theory and universal curve on La0.6-xGdxSr0.4MnO3 (x= 0 - 0.1) manganite. هنرهای کاربردی, 1(1), 39-43. doi: 10.22075/ppam.2021.23933.1010
Tina Raoufi; Fatemeh Shokrian. "Study of Landau theory and universal curve on La0.6-xGdxSr0.4MnO3 (x= 0 - 0.1) manganite". هنرهای کاربردی, 1, 1, 1400, 39-43. doi: 10.22075/ppam.2021.23933.1010
Raoufi, Tina, Shokrian, Fatemeh. (1400). 'Study of Landau theory and universal curve on La0.6-xGdxSr0.4MnO3 (x= 0 - 0.1) manganite', هنرهای کاربردی, 1(1), pp. 39-43. doi: 10.22075/ppam.2021.23933.1010
Raoufi, Tina, Shokrian, Fatemeh. Study of Landau theory and universal curve on La0.6-xGdxSr0.4MnO3 (x= 0 - 0.1) manganite. هنرهای کاربردی, 1400; 1(1): 39-43. doi: 10.22075/ppam.2021.23933.1010

Study of Landau theory and universal curve on La0.6-xGdxSr0.4MnO3 (x= 0 - 0.1) manganite

Progress in Physics of Applied Materials
مقاله 7، دوره 1، شماره 1، اسفند 2021، صفحه 39-43    اصل مقاله (1.13 M)
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.22075/ppam.2021.23933.1010
نویسندگان
Tina Raoufi* 1، 2؛ Fatemeh Shokrian3
1Beijing National Laboratory for Condensed Matter Physics and Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Physics, Chinese Academy of Science, Beijing 100190, China.
2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
3Education of Semnan province, Semnan, Iran.
تاریخ دریافت: 20 تیر 1400،  تاریخ بازنگری: 05 مرداد 1400،  تاریخ پذیرش: 09 مرداد 1400 
چکیده
In this study, the magnetocaloric effect and magnetic properties of La0.6-xGdxSr0.4MnO3 (x= 0-0.1) samples (with the R-3c space group crystalize in rhombohedral structure) synthesized by the Sol-gel method is presented here. The aim of the study is the investigation of the Landau theory and universal curve approach applied to the magnetic entropy change of La0.6-xGdxSr0.4MnO3 (x= 0-0.1) compounds. A universal curve is an important tool that allows us to compare the performance quality of different materials during measurements, regardless of their nature, processing, or experimental settings. Thermodynamic models were used to calculate the MCE. Theoretical and experimental data -∆SM (T) are well-matched in the compounds. The study of the universal curve and Landau theory showed that the nature of the transition is the second-order ferromagnetic (FM) -paramagnetic (PM) magnetic phase transition. From an application point of view, theoretical research confirmed that compounds containing Gd in the La site can be used for magnetic refrigeration technology.
کلیدواژه‌ها
Manganite؛ Landau theory؛ Universal Curve؛ Magnetocaloric effect؛ Second-order phase transition
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