Details

Autor(en) / Beteiligte

• Gao, Fei
• Ren, Weijun
• Zhuang, Yanxin
• Zhao, Xinguo
• Li, Bing
• Zhang, Zhidong

Titel

Magnetocaloric effect of an antiferromagnetic ErAl2Ge2 single crystal

Ist Teil von

• Journal of magnetism and magnetic materials, 2021-09, Vol.533, p.168014, Article 168014

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2021

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •A large magnetocaloric effect was found in antiferromagnetic compound ErAl2Ge2.•The maximum magnetic entropy change is −19.52 J/kg K for isotropic ErAl2Ge2.•The maximum magnetic entropy change is −24.84 J/kg K for ErAl2Ge2 single crystal.•The rotating magnetic entropy changes is −6.30 J/kg K for ErAl2Ge2 single crystal at H = 20 kOe.•Single crystal or textured ErAl2Ge2 may be used as the refrigerant of rotating magnetic refrigerator. The magnetocaloric effect (MCE) is the entropy change in magnetic materials upon application and removal of magnetic fields, providing an alternative path for refrigeration other than conventional gas cycles. In this work, we report a large MCE of the antiferromagnetic compound ErAl2Ge2. The maximum magnetic-entropy change is −19.52 J/kg K under a magnetic field change of 0–70 kOe for isotropic ErAl2Ge2 powder. This value increases to −24.84 J/kg K for a single crystal when the direction of the magnetic field H is parallel to the ab-plane. By using the anisotropy of the MCE of an ErAl2Ge2 crystal, large rotating magnetic-entropy changes of −6.30 J/kg K for H = 20 kOe and −9.03 J/kg K for H = 40 kOe can be obtained. Thus, a single crystal or textured ErAl2Ge2 may be used as the refrigerant of a rotating magnetic refrigerator, a magnetic cooling system with a simple structure.