MAGNETOCALORIC EFFECT SUPPRESSION INDUCED BY MECHANICAL MILLING ON INTERMETALLIC DyCo2

被引：0

作者：

de Paula, V. G. ^{[1
]}

Silva, M. Gomes ^{[2
]}

da Silva, L. M. ^{[2
]}

dos Santos, A. O. ^{[2
]}

Lang, R. ^{[3
]}

Otubo, L. ^{[4
]}

Coelho, A. A. ^{[1
]}

Cardoso, L. P. ^{[1
]}

机构：

[1] Univ Estadual Campinas UNICAMP, Inst Fis Gleb Wataghin, BR-13083859 Sao Paulo, Brazil

[2] Univ Fed Maranhao UFMA, CCSSJ, BR-65900000 Imperatriz, Maranhao, Brazil

[3] Univ Fed Sao Paulo, ICT, BR-12231280 Sao Paulo, Brazil

[4] IPEN, Ctr Ciencia & Tecnol Mat, BR-05508000 Sao Paulo, Brazil

来源：

7TH INTERNATIONAL CONFERENCE ON MAGNETIC REFRIGERATION AT ROOM TEMPERATURE | 2016年

关键词：

mechanical milling; magnetocaloric effect; magnetization;

D O I：

10.18462/iir.thermag.2016.0208

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Structural and magnetic properties of mechanically milled samples of intermetallic DyCo2 were investigated by x-ray diffraction and magnetization measurements. The results show that the average crystallite size is reduced down to 35 un for the sample milled for 8 h. The milling process induces structural disorder as evidenced by x-ray diffraction data, leading to a weakening of Itinerant Electron Metamagnetism (IEM) mechanism and suppression of the magnetocaloric effect. The RCP values of milled samples were not significantly reduced in comparison with the bulk sample due to the broadening of magnetic entropy change peak.

引用

页码：267 / 270

页数：4

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