Enhancement of the curie temperature due to the coupling between Fe itinerant electrons and Dy localized electrons in DyFe2Zn20

被引：11

作者：

Isikawa, Yosikazu ^{[1
]}

Mizushima, Toshio ^{[1
]}

Miyamoto, Souta ^{[1
]}

Kumagai, Keigou ^{[1
]}

Nakahara, Mako ^{[1
]}

Okuyama, Hiroaki ^{[1
]}

Tayama, Takashi ^{[1
]}

Kuwai, Tomohiko ^{[1
]}

Lejay, Pascal ^{[2
,3
]}

机构：

[1] Toyama Univ, Grad Sch Sci & Engn, Toyama 9308555, Japan

[2] Ctr Natl Rech Sci, Inst Neel, FR-38042 Grenoble 9, France

[3] Univ Grenoble 1, FR-38042 Grenoble 9, France

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2013年 / 63卷 / 03期

基金：

日本学术振兴会;

关键词：

DyFe2Zn20; Single crystal; CEF; Magnetic anisotropy; Ferrimagnet; Rare earth; Itinerant electrons; FERROMAGNETISM;

D O I：

10.3938/jkps.63.644

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The temperature dependences of the magnetization and the specific heat of the ferromagnetic compound DyFe2Zn20 have been measured in detail in various magnetic fields. We have observed anomalous magnetic behaviors, i.e., a strong anisotropy at 2 K, the disappearance of this anisotropy at temperatures between approximately 30 K and T (c) , and an anomalous behavior of the specific heat in magnetic fields at temperatures near 20 K. These anomalous phenomena have been analyzed based on the strong exchange interaction between the Fe itinerant electrons and the Dy localized electrons, as well as the crystalline electric field, the Zeeman energy, and an usual exchange interaction between two Dy atoms. The higher T (c) of DyFe2Zn20 compared with that of DyRu2Zn20 is caused by this exchange interaction between the Fe and the Dy atoms.

引用

页码：644 / 649

页数：6

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