Abstract
Electric field modulation of magnetic properties via magnetoelectric coupling in composite materials is of fundamental and technological importance for realizing tunable energy efficient electronics. Here we provide foundational analysis on magnetoelectric voltage tunable inductor (VTI) that exhibits extremely large inductance tunability of up to 1150% under moderate electric fields. This field dependence of inductance arises from the change of permeability, which correlates with the stress dependence of magnetic anisotropy. Through combination of analytical models that were validated by experimental results, comprehensive understanding of various anisotropies on the tunability of VTI is provided. Results indicate that inclusion of magnetic materials with low magnetocrystalline anisotropy is one of the most effective ways to achieve high VTI tunability. This study opens pathway towards design of tunable circuit components that exhibit field-dependent electronic behavior.
Highlights
Electric field modulation of magnetic properties via magnetoelectric coupling in composite materials is of fundamental and technological importance for realizing tunable energy efficient electronics
Through combination of analytical models that were validated by experimental results, comprehensive understanding of various anisotropies on the tunability of voltage tunable inductor (VTI) is provided
E-field or voltage tunable inductors (VTIs) represent a new class of magnetoelectric components that can have significant effect on enhancing the efficiency of power electronics and reducing the number of passives by actively changing the magnitude of inductance depending upon the operating conditions
Summary
Electric field modulation of magnetic properties via magnetoelectric coupling in composite materials is of fundamental and technological importance for realizing tunable energy efficient electronics. We provide foundational analysis on magnetoelectric voltage tunable inductor (VTI) that exhibits extremely large inductance tunability of up to 1150% under moderate electric fields This field dependence of inductance arises from the change of permeability, which correlates with the stress dependence of magnetic anisotropy. Multiferroic magnetoelectric composites comprising of magnetostrictive and piezoelectric phases take advantage of strain-mediated interaction that allows control of magnetic permeability through E-field[1,3,4] This control can be exploited to re-design one of the fundamental components for electronic circuits, inductor, that is extensively used in control circuits, power converters, filters, etc. E-field or voltage tunable inductors (VTIs) represent a new class of magnetoelectric components that can have significant effect on enhancing the efficiency of power electronics and reducing the number of passives by actively changing the magnitude of inductance depending upon the operating conditions. This VTI exhibited an inductance tunability of up to 56.6% in a wide range of frequency
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