Critical properties of mixed spin-1 and spin-5/2 with equal and unequal crystal fields
Ali Yigita) and Erhan Albayrakb)†
a. Çankhirhi Karatekin University, Department of Physics, 18100, Çankhirhi, Turkey;
b. Erciyes University, Department of Physics, 38039, Kayseri, Turkey
Abstract The effects of assuming equal or unequal crystal fields (CF) on the phase diagrams of a mixed spin-1 and spin-5/2 system are investigated in terms of the recursion relations on the Bethe lattice (BL). The equal CF case was considered for the coordination numbers q=3, 4, and 6, while for q=3 the unequal CF case was also studied. It was found that for the equal CF case, the model exhibits second-order phase transitions and two compensation temperatures for all q, the reentrant behavior for q=4 and first-order phase transitions and tricritical point (TCP) for q=6. In the unequal CF case for q=3, the system yields first- and second-order phase transitions, TCP's, and three compensation temperatures. In addition, the TCP's in a very short range are classified as the stable and unstable ones depending on their free energies.
Spin current transmission in Co1-xTbx films Li Wang(王力), Yangtao Su(苏仰涛), Yang Meng(孟洋), Haibin Shi(石海滨), Xinyu Cao(曹昕宇), and Hongwu Zhao(赵宏武). Chin. Phys. B, 2022, 31(2): 027504.
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