Ener, Semih ; Skokov, Konstantin P. ; Karpenkov, Dmitriy Yu. ; Kuz'min, Michael D. ; Gutfleisch, Oliver (2015)
Magnet properties of Mn70Ga30 prepared by cold rolling and magnetic field annealing.
In: Journal of Magnetism and Magnetic Materials, 382
doi: 10.1016/j.jmmm.2015.02.001
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The remanence and coercivity of arc melted Mn70Ga30 can be substantially improved by cold rolling. For best performance the rolled material should be annealed at T=730 K in the presence of a magnetic field of 1 T. The so-obtained magnet has a remanence of 0.239 T and a coercivity of 1.24 T at room temperature. The underlying reason for the high coercivity and remanence is the increase of the content of a metastable ferrimagnetic D022 phase at the expense of the normally stable anti-ferromagnetic D019. Magnetic field significantly increases the nucleation rate of the ferromagnetic D022 phase that leads to grain size refinement and as a consequence of improving remanence and coercive field.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Ener, Semih ; Skokov, Konstantin P. ; Karpenkov, Dmitriy Yu. ; Kuz'min, Michael D. ; Gutfleisch, Oliver |
| Art des Eintrags: | Bibliographie |
| Titel: | Magnet properties of Mn70Ga30 prepared by cold rolling and magnetic field annealing |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Mai 2015 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Magnetism and Magnetic Materials |
| Jahrgang/Volume einer Zeitschrift: | 382 |
| DOI: | 10.1016/j.jmmm.2015.02.001 |
| Kurzbeschreibung (Abstract): | The remanence and coercivity of arc melted Mn70Ga30 can be substantially improved by cold rolling. For best performance the rolled material should be annealed at T=730 K in the presence of a magnetic field of 1 T. The so-obtained magnet has a remanence of 0.239 T and a coercivity of 1.24 T at room temperature. The underlying reason for the high coercivity and remanence is the increase of the content of a metastable ferrimagnetic D022 phase at the expense of the normally stable anti-ferromagnetic D019. Magnetic field significantly increases the nucleation rate of the ferromagnetic D022 phase that leads to grain size refinement and as a consequence of improving remanence and coercive field. |
| Freie Schlagworte: | Permanent magnet, Mn–Ga, Plastic deformation, D022 phase |
| 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: | 16 Dez 2015 09:38 |
| Letzte Änderung: | 16 Dez 2015 09:38 |
| PPN: | |
| Sponsoren: | S. Ener is grateful to the European Community's Seventh Framework Programme for supporting this study with FP7/2007-2013 under Grant agreement number 280670 (Rare Earth Free Permanent Magnets – REFREEPERMAG)., K.P. Skokov acknowledges the support of the G8 Research Councils Initiative on Multilateral Research Funding under Grant agreement number 597810 (High Performance Permanent Magnets Sustainable for Next Generation – HPPMSNG.)., O. Gutfleisch gratefully acknowledges the financial support by the German Federal State of Hessen through its excellence programme LOEWE “RESPONSE”. |
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