Sanyal, Udishnu ; Ener, Semih ; Anagnostopoulou, Evangelia ; Pousthomis, Marc ; Fazzini, Pier-Francesco ; Lacroix, Lise-Marie ; Skokov, Konstantin P. ; Gutfleisch, Oliver ; Viau, Guillaume (2016)
Co@CoSb Core–Shell Nanorods: From Chemical Coating at the Nanoscale to Macroscopic Consolidation.
In: Chemistry of Materials, 28 (14)
doi: 10.1021/acs.chemmater.6b01419
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Core-shell magnetic anisotropic particles were prepared by reduction of Sb acetate at the surface of cobalt nanorods dispersed in a solution consisting of 1,2 tetradecanediol in oleylamine. X-ray diffraction and local EDS analyses revealed a thin beta-CoSb shell with a controlled thickness ranging from 5 to 15 nm that depended on the Sb/Co molar ratio and the reduction temperature. The shell completely coats the rod surface but does not alter the shape anisotropy or the hcp structure of the cobalt cores, and the hard magnetic properties are preserved after coating with a coercivity higher than 3 kOe. Consolidated nanostructured materials that exhibit properties of permanent magnets were prepared by compaction of the core-shell Co@CoSb nanorods. The thin CoSb shell was very efficient for preventing the cobalt anisotropic core from sintering at high temperatures (up to 300 degrees C) and high pressures (up to 1.5 GPa). These results indicate that the bottom-up approach is very promising for preparation of nanostructured hard magnetic materials.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Sanyal, Udishnu ; Ener, Semih ; Anagnostopoulou, Evangelia ; Pousthomis, Marc ; Fazzini, Pier-Francesco ; Lacroix, Lise-Marie ; Skokov, Konstantin P. ; Gutfleisch, Oliver ; Viau, Guillaume |
| Art des Eintrags: | Bibliographie |
| Titel: | Co@CoSb Core–Shell Nanorods: From Chemical Coating at the Nanoscale to Macroscopic Consolidation |
| Sprache: | Englisch |
| Publikationsjahr: | 26 Juli 2016 |
| Verlag: | American Chemical Society, Washington, USA |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Chemistry of Materials |
| Jahrgang/Volume einer Zeitschrift: | 28 |
| (Heft-)Nummer: | 14 |
| DOI: | 10.1021/acs.chemmater.6b01419 |
| Kurzbeschreibung (Abstract): | Core-shell magnetic anisotropic particles were prepared by reduction of Sb acetate at the surface of cobalt nanorods dispersed in a solution consisting of 1,2 tetradecanediol in oleylamine. X-ray diffraction and local EDS analyses revealed a thin beta-CoSb shell with a controlled thickness ranging from 5 to 15 nm that depended on the Sb/Co molar ratio and the reduction temperature. The shell completely coats the rod surface but does not alter the shape anisotropy or the hcp structure of the cobalt cores, and the hard magnetic properties are preserved after coating with a coercivity higher than 3 kOe. Consolidated nanostructured materials that exhibit properties of permanent magnets were prepared by compaction of the core-shell Co@CoSb nanorods. The thin CoSb shell was very efficient for preventing the cobalt anisotropic core from sintering at high temperatures (up to 300 degrees C) and high pressures (up to 1.5 GPa). These results indicate that the bottom-up approach is very promising for preparation of nanostructured hard magnetic materials. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 24 Okt 2016 11:36 |
| Letzte Änderung: | 24 Okt 2016 11:36 |
| PPN: | |
| Sponsoren: | This work was supported by the European Commission for the REFREEPERMAG FP7 project (EU NMP3-SL-2012-280670). |
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