About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Advances in Magnetic Materials
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Presentation Title |
D-18: Order-disorder Transition and Antiferromagnetism in Cu-Mn-Al BCC Alloys |
Author(s) |
Tatsuya Ito, Xiao Xu, Toshihiro Omori, Kaoru Namba, Takashi Saito, Ryosuke Kainuma |
On-Site Speaker (Planned) |
Tatsuya Ito |
Abstract Scope |
Recently, antiferromagnetic alloys have been attracting attention in the field of spintronics, because a higher Néel temperature is favored for the applications. From the previous studies, we estimated that the Cu-Mn-Al alloys would have been antiferromagnetic with a high Néel temperature if they were in the <i>B</i>2 structure. However, it is difficult to retain the <i>B</i>2 because of easy ordering to the <i>L</i>2<sub>1</sub> (Heusler) structure during quenching. In this work, we focused on the way to decrease the <i>B</i>2/<i>L</i>2<sub>1</sub> order-disorder transition temperature by substituting Al with Cu or Mn, and we investigated their magnetic properties. The Cu<sub>2+<i>x</i></sub>MnAl<sub>1-<i>x</i></sub> and Cu<sub>2</sub>Mn<sub>1+<i>x</i></sub>Al<sub>1-<i>x</i></sub> samples were prepared by induction melting, and the order-disorder transition temperatures and magnetic properties were investigated for the quenched samples. As a result, we achieved antiferromagnetism with a high Néel temperature of 540 K in Cu<sub>50</sub>Mn<sub>35</sub>Al<sub>15</sub> alloy. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, |