Effect of magnetic bias field on magnetoelectric coupling in magnetoelectric composites

Liu, Y. X.; Wan, Jing; Liu, J.-M.; Nan, Ce Wen

doi:10.1063/1.1613811

Cited by 44 publications

(30 citation statements)

References 15 publications

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“…90 The field dependency of transverse magnetoelectric coefficient (a E,31 ) can be attributed to the non-linear response of magneto-stress coupling in sample. 93 The hysteresis behavior of a E,31 is almost symmetric with respect to change in sign of applied magnetic field (either þH or ÀH) which can be originate from a small biquadratic term P 2 M 2 and can be non-linear magnetoelectricity. 94 …”

Section: J Magnetoelectric Couplingmentioning

confidence: 99%

Dielectric anomalies due to grain boundary conduction in chemically substituted BiFeO3

Kumari

Ortega

Kumar

et al. 2015

Journal of Applied Physics

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We describe systematic studies on Nd and Mn co-doped BiFeO 3 , i.e., (Bi 0.95 Nd 0.05 ) (Fe 0.97 Mn 0.03 )O 3 (BNFM) polycrystalline electroceramics. Raman spectra and X-ray diffraction patterns revealed the formation of rhombohedral crystal structure at room temperature, and ruled out structural changes in BiFeO 3 (BFO) after low percentage chemical substitution. Strong dielectric dispersion and a sharp anomaly around 620 K observed near the Neel temperature (T N $ 643 K of BFO) support strong magneto-dielectric coupling, verified by the exothermic peak in differential thermal data. Impedance spectroscopy disclosed the appearance of grain boundary contributions in the dielectric data in the region, and their disappearance just near the Neel temperature suggests magnetically active grain boundaries. The resistive grain boundary components of the BNFM are mainly responsible for magneto-dielectric coupling. Capacitive grain boundaries are not observed in the modulus spectra and the dielectric behavior deviates from the ideal Debye-type. The ac conduction studies illustrate short-range order with ionic translations assisted by both large and small polaron hopping. Magnetic studies indicate that the weak antiferromagnetic phase of BNFM ceramics is dominated by a strong paramagnetic response (unsaturated magnetization even at applied magnetic field of 7 T). The bulk BNFM sample shows a good in-plane magnetoelectric coupling (ME) coefficient. V C 2015 AIP Publishing LLC. [http://dx

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Section: J Magnetoelectric Couplingmentioning

confidence: 99%

Dielectric anomalies due to grain boundary conduction in chemically substituted BiFeO3

Kumari

Ortega

Kumar

et al. 2015

Journal of Applied Physics

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“…However, MSCP can be substituted by PECP; we note that the constitutive equations of both the materials are identical. The properties of the above material have been taken from [Liu et al 2003]; see Table 1. The dimensions of the layered cylinder, length = 4 m, inner radius = 0.7 m and thickness = 0.6 m, are taken from [Wang and Zhong 2003].…”

Section: Constitutive Equationsmentioning

confidence: 99%

Untitled

2008

JOMMS

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See inside back cover or http://www.jomms.org for submission guidelines.Regular subscription rate: $500 a year.Subscriptions, requests for back issues, and changes of address should be sent to Mathematical Sciences Publishers, 798 Evans Hall, Department of Mathematics, University of California, Berkeley, CA 94720-3840. ELASTIC CONSTANTS AND THERMAL EXPANSION AVERAGES OF A NONTEXTURED POLYCRYSTAL ROLAND DEWITThis paper gives expressions for the overall average elastic constants and thermal expansion coefficients of a polycrystal in terms of its single crystal components. The polycrystal is assumed to be statistically homogeneous, isotropic, and perfectly disordered. Upper and lower bounds for the averages are easily found by assuming a uniform strain or stress. The upper bound follows from Voigt's assumption that the total strain is uniform within the polycrystal while the lower bound follows from Reuss' original assumption that the stress is uniform. A self-consistent estimate for the averages can be found if it is assumed that the overall response of the polycrystal is the same as the average response of each crystallite. The derivation method is based on Eshelby's theory of inclusions and inhomogeneities. We define an equivalent inclusion, which gives an expression for the strain disturbance of the inhomogeneity when external fields are applied. The equivalent inclusion is then used to represent the crystallites. For the self-consistent model the average response of the grains has to be the same as the overall response of the material, or the average strain disturbance must vanish. The result is an implicit equation for the average polycrystal elastic constants and an explicit equation for the average thermal expansion coefficients. For the particular case of cubic symmetry the results can be reduced to a cubic equation for the selfconsistent shear modulus. For lower symmetry crystals it is best to calculate the self-consistent bulk and shear modulus numerically. IntroductionA polycrystal, whose properties vary in a complicated fashion from point to point over a small microscopic length scale, may appear on average to be uniform or perhaps, more generally, its properties appear to vary smoothly. The determination of such overall properties from the properties and geometrical arrangement of the constituent monocrystal grains is our aim. In the simplest case the polycrystal is assumed to be statistically homogeneous, isotropic, and perfectly disordered. General expressions for averages can then be derived. Many different properties can be averaged, such as dielectric constants, diffusivity, elastic constants, electrical conductivity, magnetic permeability, magnetostriction, piezoelectric constants, thermal conductivity, or thermal expansion. In this paper we treat the elastic constants, which have already received more attention than most other physical properties, and the thermal expansion. Elastic constants are fundamental physical data needed for the characterization of materials. In addition to their fundam...

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“…The traditional ME theories on the basis of the linear constitutive relationships of magnetostrictive material is inappropriate to describe the nonlinear ME response in a broad range of the bias magnetic field. Therefore, some theoretical researches about the influence of bias magnetic field on ME response are reported [5][6][7][8][9]. Liu et al tried to explain the problem by numerical and finite element methods, but it's still not enough to reveal the inherence of the dependence [6].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, some theoretical researches about the influence of bias magnetic field on ME response are reported [5][6][7][8][9]. Liu et al tried to explain the problem by numerical and finite element methods, but it's still not enough to reveal the inherence of the dependence [6]. Nan et al predicted the dependence of ME response on H dc by using the Green's function technique and taking into consideration the nonlinear dependence of the magnetostriction of Terfenol-D on H dc , but the model is not in an explicit form [5,8] ME composites based on a nonlinear magnetostrictive constitutive relation, but it is obviously inconvenient for practical applications due to adopting five fitting parameters to fit the experimental results [7].…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, ME composite materials can be used as transducers in wireless powering systems, energy harvesting and magnetic field sensors, with the main advantage being that they require no external power to operate. Especially, the ME laminate composite has a relative higher ME voltage coefficient and a simpler fabricating procedure, which has attracted wide concern [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Bias Magnetic Field on Magnetoelectric Characteristics in Magnetostrictive/Piezoelectric Laminate Composites

Chen¹,

Luo²

2015

Journal of Magnetics

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The magnetoelectric (ME) characteristics for Terfenol-D/PZT laminate composite dependence on bias magnetic field is investigated. At low frequency, ME response is determined by the piezomagnetic coefficient d 33,m and the elastic compliance of magnetostrictive material, d 33,m and for Terfenol-D are inherently nonlinear and dependent on H dc , leading to the influence of H dc on low-frequency ME voltage coefficient. At resonance, the mechanical quality factor Q m dependences on H dc results in the differences between the low-frequency and resonant ME voltage coefficient with H dc . In terms of ΔE effect, the resonant frequency shift is derived with respect to the bias magnetic field. Considering the nonlinear effect of magnetostrictive material and Q m dependence on H dc , it predicts the low-frequency and resonant ME voltage coefficients as a function of the dc bias magnetic field. A good agreement between the theoretical results and experimental data is obtained and it is found that ME characteristics dependence on H dc are mainly influenced by the nonlinear effect of magnetostrictive material.

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Effect of magnetic bias field on magnetoelectric coupling in magnetoelectric composites

Cited by 44 publications

References 15 publications

Dielectric anomalies due to grain boundary conduction in chemically substituted BiFeO3

Dielectric anomalies due to grain boundary conduction in chemically substituted BiFeO3

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Effect of Bias Magnetic Field on Magnetoelectric Characteristics in Magnetostrictive/Piezoelectric Laminate Composites

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