Giant magnetocaloric effect in the antiferromagnet GdScO3 single crystal
| Autor: | Zhengcai Xia, Jiang-Heng Jia, Ya-Jiao Ke, Jiafu Wang, Xiao-Xing Zhang, Yao-Dong Wu, Lei Su |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Condensed matter physics Mechanical Engineering Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion Magnetization Mean field theory Mechanics of Materials Materials Chemistry Magnetic refrigeration Antiferromagnetism 0210 nano-technology Néel temperature Single crystal Entropy (order and disorder) |
| Zdroj: | Journal of Alloys and Compounds. 803:992-997 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.06.361 |
| Popis: | We have investigated the magnetic properties and the magnetocaloric effect of GdScO 3 single crystal. A paramagnetic-antiferromagnetic magnetic phase transition has been observed in GdScO 3 single crystal at low temperature, with Gd 3+ sublattice in [001] direction ( T N = 2.6 K) and [010] direction ( T N = 2.8 K). This compound shows noticeable giant magnetocaloric effect with the maximum value of magnetic entropy change that come up to 47.3 J/kg K in [001] direction and 52.5 J/kg K in [010] direction for a field change of 70 kOe around its Neel temperature. The large magnetocaloric effect is due to the localized 4 f moment of Gd 3+ ( J = S = 7/2) ions. Taking the interactions of the system into consideration, the magnetization and magnetic entropy change can both be well fitted by the molecular field theory based on mean field approximation. The giant magnetocaloric effect suggest that GdScO 3 could be a potential material for magnetic refrigeration in low-temperature region. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect