MAGNETOSTRICTION IN ANTIFERROMAGNETIC Fe1-xMnx (0.30 ≤ x ≤ 0.55) ALLOYS

Acta Metall Sin

2008, Vol. 44

Issue (10): 1235-1237 DOI:

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MAGNETOSTRICTION IN ANTIFERROMAGNETIC Fe1-xMnx (0.30 ≤ x ≤ 0.55) ALLOYS

Xu Yun-Wei;MA Tian-Yu;;Mi YAN

浙江大学材化学院

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Xu Yun-Wei; MA Tian-Yu; Mi YAN. MAGNETOSTRICTION IN ANTIFERROMAGNETIC Fe1-xMnx (0.30 ≤ x ≤ 0.55) ALLOYS. Acta Metall Sin, 2008, 44(10): 1235-1237 .

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Abstract Antiferromagnetic Fe1-xMnx(x = 0.30, 0.35, 0.40, 0.50, 0.55) alloys have been prepared by induction melting method. A homogenization for 24 h at 1000℃ has been carried out on the samples, followed by furnace cooling to room temperature. The microstructure and magnetostrictive properties of Fe1-xMnx samples were investigated. It was found that when x≤0.40, Fe1-xMnx alloys consisted of fcc γand hcp ε phases with poor magnetostrictive property, and the volume proportion of εphase decreased with the increase of Mn content. When x>0.40, the samples were single fcc γ phase and possessed much better magnetostrictive performance. The magnetostriction of Fe0.50Mn0.50 sample reached 873×10-6 in 1.9T magnetic field. The large magnetostriction in γ-Fe-Mn alloy can be attributed to the magnetic-field-induced fcc→hcp structural transformation.

Key words: Fe-Mn alloy antiferromagnets magnetostriction magnetic-field-induced phase transformation

Received: 17 January 2008

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