Title :
Conductive microbead array detection by high-frequency eddy-current testing technique with SV-GMR sensor
Author :
Yamada, S. ; Chomsuwan, K. ; Hagino, T. ; Tian, H. ; Minamide, K. ; Iwahara, M.
Author_Institution :
Dept. of Nature & Environ. Technol., Kanazawa Univ., Ishikawa, Japan
Abstract :
This paper describes the detection of conductive microbeads (PbSn) based on eddy-current testing (ECT) technique. High-frequency magnetic field applied to the conductive microbeads enables spin-valve giant magnetoresistance (SV-GMR) sensor to detect the magnetic fields occurred from eddy currents flowing in the conductive microbeads. In this paper, analysis of these magnetic fields by an analytical method is discussed and compared with experimental results.
Keywords :
eddy current testing; giant magnetoresistance; lead alloys; magnetic sensors; micromagnetics; spin valves; tin alloys; PbSn; SV-GMR sensor; conductive microbead array detection; high-frequency eddy-current testing technique; magnetic field detection; spin-valve giant magnetoresistance sensor; Circuit testing; Eddy currents; Electrical capacitance tomography; Magnetic analysis; Magnetic field measurement; Magnetic fields; Magnetic sensors; Probes; Sensor arrays; Sensor phenomena and characterization; Conductive microbead; eddy-current testing; high-frequency; spin-valve giant magnetoresistance;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855172
