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A. P. Nosov, I. V. Gribov, N. A. Moskvina, A. V. Druzhinin, V. I. Osotov

THIN FILM FeGa-FeCoGa/Metglas/LGT STRUCTURES FOR MAGNETOELECTRIC MAGNETIC FIELD SENSORS

DOI: 10.17804/2410-9908.2018.6.117-125

The paper studies the influence of the composition of a graded magnetostrictive layer on the magnetoelectric effect in three-layered laminated structures of the type composite magnetostrictive ferromagnet / ferroelectric / composite magnetostrictive ferromagnet. A single crystal of La3Ga5.5Ta0.5O14 (lanthanum gallium tantalite) is used as the ferroelectric. The graded magnetostrictive layer consists of a Metglas-type amorphous ribbon with magnetostrictive Galfenol thin films of either Fe0.72Ga0.28 or Fe0.62Co0.19Ga0.19 compositions deposited on it by pulsed laser deposition. The dc and ac magnetic field dependences of the magnetoelectric effect are investigated in the frequency range from 20 Hz to 10 kHz. Magnetic noise is investigated at frequencies ranging between 0.5 and 14 Hz. It is shown experimentally that the deposition of the Fe0.62Co0.19Ga0.19 films increases the value of the magnetoelectric voltage coefficient and decreases magnetic noise. The results can be useful in the development of magnetoelectric sensors of dc and ac magnetic fields for
nondestructive testing at elevated temperatures.

Acknowledgments: The work was performed within the state assignment from the Ministry of Education of Russia (Spin, No. АААА-А18-118020290104-2).

Keywords: nondestructive testing, magnetic field sensor, magnetoelectric effect, amorphous alloy, thin films, Galfenol, lanthanum gallium tantalate

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Article reference

Thin Film Fega-Fecoga/metglas/lgt Structures for Magnetoelectric Magnetic Field Sensors / A. P. Nosov, I. V. Gribov, N. A. Moskvina, A. V. Druzhinin, V. I. Osotov // Diagnostics, Resource and Mechanics of materials and structures. - 2018. - Iss. 6. - P. 117-125. -
DOI: 10.17804/2410-9908.2018.6.117-125. -
URL: http://eng.dream-journal.org/issues/2018-6/2018-6_231.html
(accessed: 06/22/2024).

 

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