| Issue |
EPJ Web of Conferences
Volume 40, 2013
JEMS 2012 – Joint European Magnetic Symposia
|
|
|---|---|---|
| Article Number | 06008 | |
| Number of page(s) | 4 | |
| Section | Magnetic materials for energy applications (permanent magnets, magnetocalorics…) | |
| DOI | https://doi.org/10.1051/epjconf/20134006008 | |
| Published online | 14 January 2013 | |
https://doi.org/10.1051/epjconf/20134006008
Hard magnetic properties of melt-spun Mn-Al-C alloys
1
SATIE, ENS Cachan, CNRS, UniverSud, 61 av President Wilson, F94235 Cachan, France
2
Wigner RCP, HAS, ISSPO, H1525 Budapest, POB 49, Hungary
Structural and magnetic characterization of Mnx−yAl100−x−yC2y (x = {50, 55}; y = {0, 1}) meltspun ribbons is reported. To obtain the metastable ferromagnetic τphase, rapidly solidified alloys were annealed either in a vacuum furnace at 823 K or directly in the vibrating sample magnetometer under applied magnetic field. Optimal magnetic properties were demonstrated by Mn54Al44C2 samples proved to be singlephase with a coercivity of 0.19 T measured in both cases. For this composition the structural ε→τ phase transformation has been magnetically detected at 786 K, Curie temperature of τphase (Tc = 592 K, Tp = 610 K) has been determined using mean field approximations in ferromagnetic and paramagnetic regions. Rietveld refinement of Xray diffraction spectra was employed to analyse the phase constitution of annealed alloys, lattice parameters as a function of chemical composition and mean grain size for the phases involved.
© Owned by the authors, published by EDP Sciences, 2013
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