Magnetic nanocomposite composed of a silver matrix and grains of iron compound

被引：7

作者：

Tanaka, M

Misaka, Y

Shiomi, K

Yamamoto, T

Nakagawa, T

Katsura, M

Numazawa, T

Nakayama, T

Niihara, K

机构：

[1] Osaka Univ, Dept Nucl Engn, Suita, Osaka 5650871, Japan

[2] Natl Res Inst Met, Magnet Labs, Tsukuba, Ibaraki 305003, Japan

[3] Osaka Univ, ISIR, Ibaraki, Osaka 5670047, Japan

来源：

SCRIPTA MATERIALIA | 2001年 / 44卷 / 8-9期

关键词：

nanocomposite; iron oxide; magnetocaloric effect; lognormal distribution;

D O I：

10.1016/S1359-6462(01)00765-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The superparamagnetic nanocomposites composed of 10-30 nm nanograins of iron oxide or iron nitride dispersed in a silver matrix were synthesized and their δS was evaluated to examine their enhancement. The enhancement evaluated was smaller than predicted by a model of superparamagnetism. The magnetization of nanocomposites showed that the magnetic moment size has the lognormal distribution. The magnetocaloric efficiency was degraded by the distribution. It was necessary to synthesize nanocomposites with narrow particle distribution for improving magnetocaloric performance.

引用

页码：2141 / 2144

页数：4

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