Magnetization and magnetocaloric effect in ball-milled zinc ferrite powder

被引：58

作者：

Gass, J. ^{[1
]}

Srikanth, H. ^{[1
]}

Kislov, N. ^{[2
]}

Srinivasan, S. S. ^{[2
]}

Emirov, Y. ^{[3
]}

机构：

[1] Univ S Florida, Dept Phys, Tampa, FL 33620 USA

[2] Univ S Florida, Coll Engn, Clean Energy Res Ctr, Tampa, FL 33620 USA

[3] Univ S Florida, Coll Engn, Nanomat & Nanomanufacturing Res Ctr, Tampa, FL 33620 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 07期

关键词：

D O I：

10.1063/1.2829754

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Enhancement of magnetocaloric effect (MCE) in nanostructured materials is important for refrigeration applications such as spot cooling in microelectromechanical system devices. Here we report the first investigation of MCE properties in ball-milled ZnFe2O4 particles. The MCE was obtained by measuring a family of M-H curves at set temperature intervals and calculating the entropy change (Delta S) for this system using the Maxwell relation. The surface structure of zinc ferrite particles is sensitive to ball milling conditions and we observed that these surface effects greatly impact the MCE and our observations could provide a route for its potential enhancement by controlled surface modification. (C) 2008 American Institute of Physics.

引用

页数：3

共 20 条

[1] Preparation of zinc ferrite by high-energy ball-milling and microstructure characterization by Rietveld's analysis [J].