Mn-Sn系合金の磁性と熱膨張

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タイトル別名
  • Magnetic Properties and Thermal Expansion of Mn-Sn Alloys
  • Mn Snケイ ゴウキン ノ ジセイ ト ネツ ボウチョウ

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The magnetization, the linear thermal expansion and the hardness of Mn-Sn alloys cooled down to room temperature in a furnace after homogenizing at 1070 K for 10.8 ks were investigated. Mn-23.8-24.4%Sn alloys show a stable η-single phase with a hexagonal structure and are ferromagnetic at room temperature. The alloys containing Sn more than 24.4% show a structure mixed with a ferrimagnetic hexagonal ζ phase. The Mn-Sn alloy with an η-single phase shows a maximum value of the magnetization of 0.4×10−6 Wb·m·kg−1 in a wide temperature range below the Néel point. In the mixed phase alloy, the Curie point of ferrimagnetism appears below the antiferromagnetic transition point, and the magnetization increases abruptly with decrease of the temperature. The linear thermal expansion of the Mn-Sn alloys with an η phase exhibits a relatively low coefficient below the Néel point. A maximum value of spontaneous volume magnetostriction of 0.7×10−2 was obtained in the Mn-24.4%Sn alloy. This value is about a half of that of the Invar type Mn-Ge alloys. The Vickers hardness of Mn-Sn alloys shows a minimum value of about 300 in the vicinity of the η phase region, and the hardness rapidly increases on the lower Sn side.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 49 (7), 558-561, 1985

    公益社団法人 日本金属学会

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