The Influence of Chemical Composition on the Magnetic Properties of Fe₁.₅₋ₓCoₓRh₀.₅Mo₃N (0 ≤ x ≤ 1.5)

Abstract

The system Fe1.5-xCoxRh0.5Mo3N has been studied by neutron diffraction, magnetometry, Mössbauer spectroscopy and transport measurements in order to follow the variations in the electronic properties as cobalt is added to ferromagnetic Fe 1.5Rh0.5Mo3N. The Curie temperature is maximised (132 K) when x = 0.5, although the saturation magnetisation decreases with increasing cobalt content. Co1.5Rh0.5Mo3N does not show long-range magnetic order above 5 K. All compositions show metallic conductivity and the temperature dependence of the internal hyperfine fields in iron-rich compositions can be fitted using the Stoner model. The change in behaviour observed for x > 0.9 is attributed to the dominance of antiferromagnetic interactions in cobalt-rich regions.

Department(s)

Chemistry

Keywords and Phrases

Antiferromagnetic Materials; Curie Temperature; Electronic Properties; Neutron Diffraction; Saturation Magnetization; Chemical Compositions; Hyperfine Fields; Magnetic Orders; Metallic Conductivity; Transport Measurements; Iron Compounds

International Standard Serial Number (ISSN)

0959-9428

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Royal Society of Chemistry, All rights reserved.

Publication Date

01 Sep 2007

Link to Full Text

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