Title: Barkhausen noise as an intrinsic fingerprint for ferromagnetic components

Journal Article · · Smart Materials and Structures
ORCiD logo [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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Here in this work, the suitability of magnetic Barkhausen noise as an intrinsic fingerprint of ferromagnetic components is determined. This technique has potential for this application because it is based inherently on the near surface microstructural features of ferromagnetic materials. All materials typically display some variation in their microstructure simply as a result of the manufacturing process (rolling, heat treating, welding, grinding), thus providing the potential that Barkhausen noise measurements between nominally similar components will be unique. In this work, we demonstrate that Barkhausen noise measurements are both repeatable in time for a single sample made from a ferromagnetic material, and unique across a number of instances of nominally similar samples. The results of this work have profound implications in a variety of applications in forensics and physical security. For example, consider the fabrication of the next generation of tamper-evident containers and devices using conventional processes for steel. In addition, since Barkhausen noise is sensitive to changes in microstructures due to grinding and welding, these measurements can be used to detect clandestine repairs and tampering. Finally, because the method inherently results in a time series measurement at each point on a sample, it is expected to have far higher dimensionality than physically similar eddy current measurement. However, the higher dimensionality of Barkhausen measurements suggest that they should be harder to counterfeit than eddy current measurements.

Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
U.S. Department of State; USDOE Office of Legacy Management (LM), Office of Site Operations (LM-20)
Grant/Contract Number:
89233218CNA000001; AC52-06NA25396
OSTI ID:
1483514
Report Number(s):
LA-UR-18-22941
Journal Information:
Smart Materials and Structures, Journal Name: Smart Materials and Structures Journal Issue: 1 Vol. 28; ISSN 0964-1726
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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