News Column

Reports Outline Nanocrystals Findings from Aix-Marseille University

June 27, 2014

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Nanocrystals have been published. According to news originating from Marseille, France, by NewsRx correspondents, research stated, "In this work, we present a study focused on the effect of partial substitution of Co by Fe on structure and magnetic properties of nanocrystalline Pr2Co7. These compounds were synthesized by mechanical alloying and to correlate their properties with microstructural evolution, a multi-scale study by: X-ray diffraction (XRD), transmission electron microscopy, and magnetization was carried out."

Our news journalists obtained a quote from the research from Aix-Marseille University, "The Rietveld analysis of XRD diagrams shows that Pr2Co7-xFex, annealed at 973K, mainly adopt a hexagonal Ce2Ni7 type structure with P6(3)/mmc space group. These pseudo-ternary compounds exhibit more interesting magnetic properties than the binary Pr2Co7 compounds. A systematic study of the intrinsic magnetic properties of these alloys shows that the substitution leads to enhancement of the Curie temperatures (T-C) by 26% for a Fe content equal to 0.5. This increase is due to the electronic as well as the magnetovolume effects. In addition, the study of extrinsic magnetic properties of the Pr2Co6.5Fe0.5 compound has revealed the existence of a large coercive field H-c, and a high remanent magnetization M-r."

According to the news editors, the research concluded: "Our results show that in these alloys, iron in solid solution has a strong effect on hardness and ordering temperature, which is particularly promising for permanent magnet applications."

For more information on this research see: Intrinsic and extrinsic magnetic properties of nanocrystalline Pr-2(Co,Fe) 7. Physica Status Solidi A-Applications and Materials Science, 2014;211(4):910-916. Physica Status Solidi A-Applications and Materials Science can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany (see also Nanocrystals).

The news correspondents report that additional information may be obtained from R. Fersi, Aix Marseille Univ, CP2M, F-13397 Marseille, France. Additional authors for this research include N. Mliki, M. Cabie and L. Bessais.

Keywords for this news article include: France, Europe, Marseille, Nanotechnology, Nanocrystalline, Emerging Technologies

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Source: Science Letter

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