Analysis of domain wall dynamics based on skewness of magnetic Barkhausen noise for applied stress determination

作者：Ding, Song; Tian, GuiYun^*; Dobmann, Gerd; Wang, Ping

来源：Journal of Magnetism and Magnetic Materials, 2017, 421: 225-229.

DOI：10.1016/j.jmmm.2016.08.030

• Applied stress
• Magnetic Barkhausen Noise
• Skewness
• Domain wall motion

Skewness of Magnetic Barkhausen Noise (MBN) signal is used as a new feature for applied stress determination. After experimental studies, skewness presents its ability for measuring applied tensile stress compared with conventional feature, meanwhile, a non-linear behavior of this new feature and an independence of the excitation conditions under compressive stress are found and discussed. Effective damping during domain wall motion influencing the asymmetric shape of the MBN statistical distribution function is discussed under compressive and tensile stress variation. Domain wall (DW) energy and distance between pinning edges of the DW are considered altering the characteristic relaxation time, which is the reason for the non-linear phenomenon of skewness.

• 出版日期2017-1-1
• 单位南京航空航天大学