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論文

Abnormally enhanced diamagnetism in Al-Zn-Mg alloys

西村 克彦*; 松田 健二*; Lee, S.*; 布村 紀男*; 島野 寛基*; Bendo, A.*; 渡邊 克己*; 土屋 大樹*; 並木 孝洋*; 戸田 裕之*; et al.

Journal of Alloys and Compounds, 774, p.405 - 409, 2019/02

 パーセンタイル:100(Chemistry, Physical)

Temperature and time dependences of magnetization of Al-1.0%Zn-4.2%Mg, Al-2.6%Zn-3.2%Mg, Al-4.1%Zn-1.1%Mg, and Al-5%Zn (at.%) alloys were measured in the range between 10 and 310 K after various periods of natural aging and peak-aged heat treatments. Enhanced diamagnetic contributions on the magnetization were observed for the as-quenched Al-Zn-Mg alloys for the first time. The enhanced diamagnetism observed in Al-2.6%Zn-3.2%Mg and Al-4.1%Zn-1.1%Mg were found to largely alter in natural aging, while that of Al-1.0%Zn-4.2%Mg little changed. After peak-aged heat treatments, the diamagnetism of Al-Zn-Mg was largely reduced. The binary Al-5%Zn showed neither enhanced diamagnetism nor natural aging effect on the magnetization. Isothermal time variations of magnetization of Al-Zn-Mg alloys at 300 K were found to be related with solute-vacancy clustering.

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