Campus Units

Electrical and Computer Engineering, Ames Laboratory

Document Type

Article

Publication Date

10-2015

Journal or Book Title

Materials Evaluation

Volume

73

Issue

10

First Page

1377

Last Page

1383

Abstract

Barkhausen noise emissions occur in ferromagnetic materials on application of a time varying external magnetic field. These emissions primarily occur because of the movement of domain walls in the presence of pinning sites or discontinuities, which act as inhibitors to domain wall motion within the material. The emissions can be sensed using an induction coil placed close to the sample surface. The coil can sense the variations in magnetic flux, which translates to the induced electromagnetic field. This study optimizes the design of the barkhausen noise sensor via finite element simulations. The different parameters involved in improvement of the design of the barkhausen noise sensor are discussed.

Comments

This is an article from Materials Evaluation 73 (2015): 1377. Posted with permission.

Copyright Owner

American Society for Nondestructive Testing

Language

en

File Format

application/pdf

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