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...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.展开更多
采用射频磁控溅射技术在Sr Ti O_3(100)衬底上制备Fe_(81)Ga_(19)薄膜。利用XRD、AFM和VSM表征了Fe_(81)Ga_(19)薄膜的生长取向、内应力、表面形貌和磁性,研究了不同溅射功率(60~100 W)对Fe_(81)Ga_(19)薄膜结构和磁性能的影响。结果表...采用射频磁控溅射技术在Sr Ti O_3(100)衬底上制备Fe_(81)Ga_(19)薄膜。利用XRD、AFM和VSM表征了Fe_(81)Ga_(19)薄膜的生长取向、内应力、表面形貌和磁性,研究了不同溅射功率(60~100 W)对Fe_(81)Ga_(19)薄膜结构和磁性能的影响。结果表明,所有薄膜主要以A_2相和L1_2相存在。随着溅射功率的增大,A_2相衍射峰的强度缓慢降低,内应力显著增加,表面粗糙度降低,薄膜的剩余磁化强度和饱和磁化强度明显减小,而矫顽力保持不变,都为50 Oe。展开更多
基金Project supported by the Key Program of the National Natural Science Foundation of China (Grant No. 50531010)National Science Fund for Distinguished Young Scholars of China (Grant No. 50925101)Science Fund for Creative Research Groups of the National Natural Science Foundation of China (Grant No. 50921003)
文摘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.
文摘采用射频磁控溅射技术在Sr Ti O_3(100)衬底上制备Fe_(81)Ga_(19)薄膜。利用XRD、AFM和VSM表征了Fe_(81)Ga_(19)薄膜的生长取向、内应力、表面形貌和磁性,研究了不同溅射功率(60~100 W)对Fe_(81)Ga_(19)薄膜结构和磁性能的影响。结果表明,所有薄膜主要以A_2相和L1_2相存在。随着溅射功率的增大,A_2相衍射峰的强度缓慢降低,内应力显著增加,表面粗糙度降低,薄膜的剩余磁化强度和饱和磁化强度明显减小,而矫顽力保持不变,都为50 Oe。
