Magnetoelectric laminate composite based tachometer for harsh environment applications

Robert Myers, Rashed Adnan Islam, Makarand Karmarkar, Shashank Priya

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


This study reports the design, fabrication, and characterization of a tachometer utilizing magnetoelectric (ME) laminate composites with sandwich structure consisting of Pb (Zr,Ti) O3 (PZT) and Galfenol. High temperature characterization of Galfenol shows that it can sustain the magnetic property over 500 °C. The Curie temperature of PZT compositions was in the range of 325-340 °C. The magnitude of the ME coefficient was found to scale with the dimensionless ratio (d g/S), where d is the piezoelectric strain constant, g is the piezoelectric voltage constant, and S is the elastic compliance. The tachometer design is based on the principle that when ME composite is exposed to oscillating magnetic field, it generates voltage with the same frequency.

Original languageEnglish (US)
Article number122904
JournalApplied Physics Letters
Issue number12
StatePublished - 2007
Externally publishedYes


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