Magnetoelectric effect in three-layered gradient LiNbO3/Ni/Metglas composites

• Published in: Modern electronic materials Vol. 8; no. 4; pp. 141 - 147
• Main Authors: Kuts, Viktor V., Turutin, Andrei V., Kislyuk, Aleksandr M., Kubasov, Ilya V., Zhukov, Roman N., Temirov, Alexander A., Malinkovich, Mikhail D., Sobolev, Nikolai A., Parkhomenko, Yuri N.
• Format: Journal Article
• Language: English
• Published: Moscow Pensoft Publishers 2022
• Subjects: Annealing; Coefficients; Composite materials; Lithium niobates; Magnetic fields; Remanence
• ISSN: 2452-2449; 2452-1779
• DOI: 10.3897/j.moem.8.4.98951

The effect of annealing in a permanent magnetic field on the magnitude of magnetoelectric coefficient in three-layered gradient magnetoelectric LiNbO
3
/Ni/Metglas composites has been studied. A method of electrochemical nickel deposition on bidomain lithium niobate crystals has been demonstrated. We show that the optimum annealing temperature in a permanent magnetic field for the generation of the highest remanence in the Ni layer is 350 °C. The specimens annealed at this temperature exhibit the greatest shift of the magnetoelectric coefficient dependence on external magnetic field magnitude relative to the value
H
dc
= 0. The quasi-static magnetoelectric coefficient in the absence of an external magnetic field proves to be 1.2 V/(cm ∙ Oe). The highest magnetoelectric coefficient that has been achieved at a bending structure resonance frequency of 278 Hz proves to be 199.3 V/(cm ∙ Oe) without application of an external magnetic field. The experimental magnetoelectric coefficient figures for three-layered gradient LiNbO
3
/Ni/Metglas composites are not inferior to those for most magnetoelectric composite materials reported earlier.