Giant magnetodielectric effect and magnetic field tunable dielectric resonance in spinel MnZn ferrite

Abstract

Articles you may be interested inSingle-phase Mn1−xZnxFe2O4(x=0.2, 0.5, 0.8) hollow ceramic microspheres: One-step preparation and electromagnetic properties Effect of Li substitution on dielectric and ferroelectric properties of ZnO thin films grown by pulsed-laser ablationThe sensitive response of the dielectric permittivity under the application of magnetic fields in Mn 0.60 Zn 0.40 Fe 2.12 O 4+␦ polycrystalline ferrite is presented. A magnetic field of 3.5 kOe induced a giant magnetodielectric ͕MD= ͓Ј͑H͒ − Ј͑0͔͒ / Ј͑0͖͒ response, of 1800% at f = 7 MHz, at room temperature. The ferrite exhibits a large magnetic field-induced frequency response of 180 Hz/Oe. We suggest that this effect arises primarily from a spin-dependent space charge polarization mechanism in response to the application of dc magnetic fields.

Magnetic and magnetodielectric properties of Bi-substituted yttrium iron garnet ceramics

“…This means that magnetodielectric effect may arise in materials without coupling between magnetic and electric orders. Such extrinsic magnetodielectric effect has been observed in g-Fe 2 O 3 [14], spinel MnZn ferrite [15], La 2/3 Ca 1/3 MnO 3 [16], LaBiMn 4/3 Co 2/3 O 6 [17], and so on. Catalan also suggests that careful examination of dielectric losses and frequency dependence helps us to understand the physical nature of the observed magnetodielectric effect [13].…”

Magnetodielectric effect of Mn–Zn ferrite at resonant frequency

“…Through the combination of the Maxwell-Wagner (M-W) effect and magnetoresistance (MR) effect, the MD effect can be achieved in the ferromagnetic material without magnetoelectric coupling [7]. Recently, Yajie Chen reported a MD ratio of 1800% in Mn 0.60 Zn 0.40 Fe 2.12 O 4 þ at f ¼7 MHz in a magnetic field of 3.5 kOe [8].…”

“…According to reports, the MD effect is enhanced at resonant frequency compared with the one at non-resonant frequency [6][7][8][9]. However, the generation mechanism of the large MD effect at resonant frequency has not been investigated.…”

Magnetodielectric effect in composites of nanodimensional glass and CuO nanoparticles

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Most of these materials fall into the category of multiferroics-a single phase material possessing both ferroelectric and ferromagnetic order.…”