SUPERPARAMAGNETIC NANOCOMPOSITE OF SILVER IRON-OXIDE BY INERT-GAS CONDENSATION

被引：20

作者：

YAMAMOTO, T

SHULL, RD

BANDARU, PR

COSANDEY, F

HAHN, HW

机构：

[1] NIST, MAGNET MAT GRP, GAITHERSBURG, MD 20899 USA

[2] RUTGERS STATE UNIV, DEPT MAT SCI & ENGN, PISCATAWAY, NJ 08855 USA

[3] TH DARMSTADT, D-64295 DARMSTADT, GERMANY

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1994年 / 33卷 / 9B期

关键词：

NANOCOMPOSITE; NANOCRYSTALS; SUPERPARAMAGNETISM; IRON OXIDE; SILVER; INERT GAS CONDENSATION; MAGNETIC MATERIALS; MAGNETIZATION; GIANT MAGNETORESISTANCE; MAGNETIC REFRIGERATION;

D O I：

10.1143/JJAP.33.L1301

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A superparamagnetic nanocomposite of silver and iron oxide was synthesized by gas condensation. The procedure involved (1) coevaporation of Silver and iron, (2) in situ oxidation of iron particles, (3) in situ compaction, and (4) post-annealing in an inert or an oxidizing atmosphere. The magnetization plots against H/T fell on a single curve from room temperature to 160 K, thereby providing evidence of superparamagnetism. Annealing treatment modifies the effective magnetic moment size and saturation value of magnetization. The present process is a potential synthesis route for magnetic nanocomposites useful for applications such as magnetic refrigeration, recording and permanent magnets.

引用

页码：L1301 / L1303

页数：3

共 10 条

[1]

Bean C. P., 1959, J APPL PHYS S, V30

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