Structure and magnetic properties of iron-based cyanide compounds

Author

Ding, J. ; Ng, C.W. ; Shi, Y.

Author_Institution

Dept. of Mater. Sci., Nat. Univ. of Singapore, Singapore

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

2938

Lastpage

2940

Abstract

The M_1.5[Fe(CN)₆]·zH₂O powders with M=Ni, Co, Cu and Zn and z=4-7 were prepared by co-precipitation. A structural change was found after heat treatment at a temperature in the range of 100-200°C. Mossbauer and magnetic measurements have shown that the Fe^III-CN-M^II state was the major structure in the co-precipitated form, while the Fe ^II-CN-M^III bond was formed in the annealed samples. The stable Fe^II-CN-M^III state could convert into a metastable Fe^III-CN-M^II state accompanied by two peaks in UV-visible spectra. A broad peak was observed in the photo-luminescence spectra, indicating the potential for optical applications

Keywords

Mossbauer effect; annealing; iron compounds; magnetic particles; molecular magnetism; photoluminescence; powders; precipitation (physical chemistry); ultraviolet spectra; visible spectra; 100 to 200 C; Co_1.5[Fe(CN)₆]; Co_1.5[Fe(CN)₆]·zH₂O powder; Cu_1.5[Fe(CN)₆]; Cu_1.5[Fe(CN)₆]·zH₂O powder; Mossbauer spectra; Ni_1.5[Fe(CN)₆]; Ni_1.5[Fe(CN)₆]·zH₂O powder; UV-visible spectra; Zn _1.5[Fe(CN)₆]·zH₂O powder; Zn_1.5[Fe(CN)₆]; annealing; co-precipitation; heat treatment; iron cyanide compound; magnetic properties; metastable state; molecular magnet; photoluminescence spectra; structure; Annealing; Bonding; Heat treatment; Iron; Magnetic properties; Magnetic variables measurement; Metastasis; Powders; Temperature distribution; Zinc;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951353

Filename

951353