Table-like shape magnetocaloric effect and large refrigerant capacity in dual-phase HoNi/HoNi2 composite?

• 作者: Dan Guo Jiang Wang Yaming Wang Yikun Zhang Zhongming Ren
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL,MAGNETIC,AND OPTICAL PROPERTIES
• 页码范围: 588-592
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/aba9be

摘要

Nowadays, magnetic cooling (MC) technology by using the magnetocaloric effect (MCE) has attracted extensive research interest for its promising practical applications. A constant large/giant MCE covers wide refrigeration temperatures (denote as table-like shape) is beneficial for obtaining high efficiency performance for MC. In this paper, the HoNi/HoNi2 composite was successfully synthesized by arc-melting method and proved to be composed of HoNi and HoNi2 crystalline phases with weight ratios of 52.4 wt.％ and 47.6 wt.％, respectively. The maximum magnetic entropy change (-?SmaxM ) is 18.23 J/(kg·K), and the refrigerant capacity values RC1, RC2, and RC3 are 867.9 J/kg, 676.4 J/kg, and 467.8 J/kg with?H = 0–70 kOe, respectively. The table-like shape MCE and large refrigerant capacity values make the composite attractive for cryogenic MC using the Ericsson cycle.