scholarly journals Barkhausen noise and critical scaling in the demagnetization curve

2003 ◽  
Vol 67 (2) ◽  
Author(s):  
John H. Carpenter ◽  
Karin A. Dahmen
Keyword(s):  
Barkhausen Noise ◽  
Critical Scaling ◽  
Demagnetization Curve

Estimation of Demagnetization Curve of Magnet with Nonuniform Coercivity

2012 ◽  
Vol 132 (1) ◽  
pp. 101-107
Author(s):  
Takayuki Tokushige ◽  
Masafumi Umabuchi ◽  
Daisuke Miyagi ◽  
Norio Takahashi ◽  
Masaru Ito ◽  
...  
Keyword(s):  
Demagnetization Curve

scholarly journals Time-Response-Histogram-Based Feature of Magnetic Barkhausen Noise for Material Characterization Considering Influences of Grain and Grain Boundary under In Situ Tensile Test

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2350
Author(s):  
Jia Liu ◽  
Guiyun Tian ◽  
Bin Gao ◽  
Kun Zeng ◽  
Yongbing Xu ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Tensile Stress ◽  
Material Properties ◽  
Ferromagnetic Material ◽  
Silicon Steel ◽  
Time Response ◽  
Barkhausen Noise ◽  
Time Interval ◽  
Magnetic Barkhausen Noise

Stress is the crucial factor of ferromagnetic material failure origin. However, the nondestructive test methods to analyze the ferromagnetic material properties’ inhomogeneity on the microscopic scale with stress have not been obtained so far. In this study, magnetic Barkhausen noise (MBN) signals on different silicon steel sheet locations under in situ tensile tests were detected by a high-spatial-resolution magnetic probe. The domain-wall (DW) motion, grain, and grain boundary were detected using a magneto-optical Kerr (MOKE) image. The time characteristic of DW motion and MBN signals on different locations was varied during elastic deformation. Therefore, a time-response histogram is proposed in this work to show different DW motions inside the grain and around the grain boundary under low tensile stress. In order to separate the variation of magnetic properties affected by the grain and grain boundary under low tensile stress corresponding to MBN excitation, time-division was carried out to extract the root-mean-square (RMS), mean, and peak in the optimized time interval. The time-response histogram of MBN evaluated the silicon steel sheet’s inhomogeneous material properties, and provided a theoretical and experimental reference for ferromagnetic material properties under stress.

Kit demonstrates Barkhausen noise

2011 ◽  
Vol 46 (6) ◽  
pp. 651-653
Author(s):  
Mark Harrison
Keyword(s):  
Barkhausen Noise
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