Investigation of Room Temperature Ferromagnetic Nanoparticles of Gd5Si4

被引：14

作者：

Hadimani, R. L. ^{[1
,2
]}

Gupta, S. ^{[2
]}

Harstad, S. M. ^{[3
]}

Pecharsky, V. K. ^{[2
,3
]}

Jiles, D. C. ^{[1
,3
]}

机构：

[1] Iowa State Univ, Dept Elect & Comp Engn, Ames, IA 50011 USA

[2] US DOE, Ames Lab, Div Mat Sci & Engn, Ames, IA 50011 USA

[3] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2015年 / 51卷 / 11期

关键词：

Contrast agents; gadolinium nanoparticles; magnetocaloric nanoparticles; room temperature ferromagnetic nanoparticles; GD;

D O I：

10.1109/TMAG.2015.2446774

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Gd-5(SixGe1-x)(4) compounds undergo first-order phase transitions close to room temperature when x congruent to 0.5, which are accompanied by extreme changes of properties. We report the fabrication of the nanoparticles of one of the parent compounds-Gd5Si4-using high-energy ball milling. Crystal structure, microstructure, and magnetic properties have been investigated. Particles agglomerate at long milling times, and the particles that are milled >20 min lose crystallinity and no longer undergo magnetic phase transition close to 340 K, which is present in a bulk material. The samples milled for >20 min exhibit a slightly increased coercivity. Magnetization at a high temperature of 275 K decreases with the increase in the milling time.

引用

页数：4

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