Ener, Semih and Kroder, Johannes and Skokov, Konstantin P. and Gutfleisch, Oliver (2016):
The search for room temperature tetragonal phases of Fe-Mn-Ga: A reactive crucible melting approach.
In: Journal of Alloys and Compounds, 683, pp. 198-204. Elsevier Science Publishing, ISSN 09258388,
[Article]
Abstract
For the experimental search of new permanent magnet materials a bulk high-throughput method is needed. One possible method for bulk high-throughput screening is the simple and effective reactive crucible melting technique. In this work, we successfully applied reactive crucible melting to the Ni-Mn-Ga and Fe-Mn-Ga ternary Heusler systems. Energy dispersive X-ray spectroscopy was used for elemental analysis of phases formed in the crucibles which allowed us to construct parts of the room-temperature phase diagrams of Ni-Mn-Ga and Fe-Mn-Ga systems. By means of magneto-optical Kerr microscopy the phases with stripe domains - an essential feature of an uniaxial magnetic anisotropy- were identified and synthesized by conventional metallurgy. The structural/microstructural properties of the synthesized individual sample were investigated in addition to the magnetic properties. The most interesting hard magnetic material in Fe-Mn-Ga family is Mn38.5Fe32.5Ga29 with the remanent magnetization of 20 Am2kg−1 and a coercivity of 0.33 T at room temperature.
| Item Type: | Article |
|---|---|
| Erschienen: | 2016 |
| Creators: | Ener, Semih and Kroder, Johannes and Skokov, Konstantin P. and Gutfleisch, Oliver |
| Title: | The search for room temperature tetragonal phases of Fe-Mn-Ga: A reactive crucible melting approach |
| Language: | English |
| Abstract: | For the experimental search of new permanent magnet materials a bulk high-throughput method is needed. One possible method for bulk high-throughput screening is the simple and effective reactive crucible melting technique. In this work, we successfully applied reactive crucible melting to the Ni-Mn-Ga and Fe-Mn-Ga ternary Heusler systems. Energy dispersive X-ray spectroscopy was used for elemental analysis of phases formed in the crucibles which allowed us to construct parts of the room-temperature phase diagrams of Ni-Mn-Ga and Fe-Mn-Ga systems. By means of magneto-optical Kerr microscopy the phases with stripe domains - an essential feature of an uniaxial magnetic anisotropy- were identified and synthesized by conventional metallurgy. The structural/microstructural properties of the synthesized individual sample were investigated in addition to the magnetic properties. The most interesting hard magnetic material in Fe-Mn-Ga family is Mn38.5Fe32.5Ga29 with the remanent magnetization of 20 Am2kg−1 and a coercivity of 0.33 T at room temperature. |
| Journal or Publication Title: | Journal of Alloys and Compounds |
| Journal volume: | 683 |
| Publisher: | Elsevier Science Publishing |
| Uncontrolled Keywords: | Reactive crucible melting, Fe-Mn-Ga, Heusler alloys, Hard magnetic phases |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Functional Materials 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 08 Jul 2016 11:13 |
| Official URL: | http://dx.doi.org/10.1016/j.jallcom.2016.05.069 |
| Identification Number: | doi:10.1016/j.jallcom.2016.05.069 |
| Funders: | The authors thank the LOEWE project RESPONSE funded by the Ministry of Higher Education, Research and the Arts (HMWK) of the Hessen state. |
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