Magnetostriction of Fe81Ga19 oriented crystals

• Published in: Chinese physics B 2010-11, Vol.19 (11), p.646-652
• Main Author: 王智彬 刘敬华 蒋成保
• Format: Article
• Language: English
• Subjects: MPa; 取向晶体; 帕斯卡; 应力计算; 数值模拟; 磁致伸缩效应; 预应力
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/19/11/117504

The effect of the orientation on the magnetostriction in Fe81Ga19 alloy has been investigated experimentally and theoretically. The Fe81Ca19 [001] and [110] oriented crystals were prepared and the magnetostriction was measured under different pre-stress. The saturation magnetostriction of the [001] oriented crystal increases from 170×10^-6 to 330×10^-6 under the pre-stress from 0 to 50 MPa. The [110] oriented crystal has a saturation magnetostriction from 20×10^-6 to 140×10^-6 with the compressive pre-stress from 0 to 40 MPa. The magnetostriction of [001] and [110] oriented crystals has been simulated based on the phenomenological theory. The domain rotation path has been determined and the resultant magnetostriction calculated under different pre-stress. The experimental and simulated results both show that the [001] oriented crystal exhibits better magnetostriction than [110] oriented crystal. The enhancement of the saturation magnetostriction by the compressive pre-stress in the [110] oriented crystal is higher than that in the [001] oriented crystal.