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Identification and critical phenomenon studies of polymorphic phases in binary intermetallic compound DyIr3
Intermetallics ( IF 4.4 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.intermet.2020.106740
Binita Mondal , Shovan Dan , Sudipta Mondal , R.N. Bhowmik , R. Ranganathan , Chandan Mazumdar

Abstract The rare-earth and transition-metal based polycrystalline, binary compound DyIr 3 has been synthesized successfully and is found to form as a macroscopic coexistence of AuBe5 and AuCu 3 -type polymorphic structures. The analysis of dc magnetization and specific heat data reveals that among the two polymorphic phases, the AuBe5-type phase exhibits ferromagnetic ground state below 22 K, while AuCu 3 -type phase shows paramagnetic behaviour down to 2 K. The detail studies of magnetic relaxation, magnetic memory effect and frequency dependency of ac magnetic susceptibility establish the presence of glassy phase in the system. The critical behaviour have been investigated for DyIr 3 in detail in the vicinity of its magnetic transition temperature by means of dc magnetization, specific heat data, Arrott–Noakes plot, Kouvel–Fisher plot, critical isotherm, and magnetocaloric study. The type of magnetic universal class, in which DyIr 3 belongs, has been identified through the critical behaviour study.

中文翻译:

二元金属间化合物DyIr3多晶相的识别和临界现象研究

摘要 稀土和过渡金属基多晶二元化合物DyIr 3 已成功合成,并发现其形成为AuBe5 和AuCu 3 型多晶型结构的宏观共存。直流磁化强度和比热数据分析表明,在两个多晶相中,AuBe5 型相在 22 K 以下表现出铁磁基态,而 AuCu 3 型相在 2 K 以下表现出顺磁行为。 磁弛豫的详细研究、磁记忆效应和交流磁化率的频率依赖性确定了系统中玻璃相的存在。已经通过直流磁化、比热数据、Arrott-Noakes 图、Kouvel-Fisher 图、DyIr 3 在其磁转变温度附近详细研究了临界行为,临界等温线和磁热研究。通过临界行为研究确定了 DyIr 3 所属的磁性通用类的类型。
更新日期:2020-05-01
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