Magnetoelectric doubling and mixing of electric and magnetic field frequencies in a layered multiferroic heterostructure

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:485

Article

Burdin, D. A.¹  Ekonomov, N. A.¹  Chashin, D., V¹  Fetisov, Y. K.¹  Gordeev, S. N.^2,3 

[1] MIREA Russian Technol Univ, Moscow 119454, Russia

[2] Univ Bath, Dept Phys, Bath BA2 7AY, Avon, England

[3] Univ Bath, Ctr Nanosci & Nanotechnol, Bath BA2 7AY, Avon, England

关键词: Multiferroic heterostructure;    Nonlinear magnetoelectric effect;    Piezoelectric effect;    Elastomagnetic effect;    Frequency mixing;    Frequency doubling;   

DOI  :  10.1016/j.jmmm.2019.04.037

来源: Elsevier

【 摘 要 】

Nonlinear magnetoelectric effects in a disk-like heterostructure composed of a layer of amorphous ferromagnet (FeBSiC) mechanically coupled to a layer of piezoelectric ceramics (lead zirconate titanate) were studied both experimentally and theoretically. The structure was excited by alternating electrical and magnetic fields far from its acoustic resonance frequency. This induced changes in the magnetic induction within the heterostructure which were recorded using an electromagnetic coil. The experiments were performed for excitations with electric and magnetic fields up to 250 V/cm and 6 Oe, respectively, and bias permanent magnetic fields up to 60 Oe. For large excitation fields, a generation of the second harmonic and harmonics corresponding to the sum and difference frequencies were observed. The coefficient of the frequency doubling for the converse magnetoelectric effect and the coefficient of mixing of electrical and magnetic field frequencies were found to be 4.6.10(-6) G cm(2)/V-2 and similar to 1.10(-2) G cm/(Oe.V), respectively. A simple theoretical model qualitatively describing the experimental findings was proposed. It was shown that the nonlinearity in the converse magnetoelectric effect arises due to the nonlinear dependence of magnetic induction in the ferromagnetic layer on mechanical stress.

【 授权许可】

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