MAGNETIC MEASUREMENTS AND TRANSMISSION ELECTRON-MICROSCOPY INVESTIGATIONS ON FE-CO ULTRAFINE POWDERS DERIVED FROM A BIMETALLIC CARBONYL CLUSTER

被引：2

作者：

PREDIERI, G

PARETI, L

SOLZI, M

ARMIGLIATO, A

BIGI, S

机构：

[1] CNR,IST LAMEL,I-40126 BOLOGNA,ITALY

[2] CNR,INST MASPEC,I-43100 PARMA,ITALY

[3] UNIV MODENA,IST MINERAL & PETROL,I-41100 MODENA,ITALY

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1994年 / 4卷 / 02期

关键词：

D O I：

10.1039/jm9940400361

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The molecular carbonyl cluster HFeCo3(CO)12 (1) affords an ultrafine Fe-Co powder by thermal treatment under inert atmosphere. Several magnetic or magneto-structural transformations have been evidenced by thermomagnetic analysis (TMA) from 20 to 950-degrees-C. Transmission electron microscopy (TEM) investigations on samples treated at an intermediate temperature showed the presence of both mono- and bi-metallic crystallites of nanometric size. The saturation magnetization was found to increase with increasing annealing temperature, while the opposite behaviour was found for coercitivity. A comparison was made with the magnetic properties of the cast FeCo3 alloy.

引用

页码：361 / 364

页数：4

共 15 条

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