Hysteresis and remanence in magnetoelectric effects in functionally graded magnetostrictive-piezoelectric layered composites

Laletin, U.; Sreenivasulu, G.; Петров, В. М.; Garg, Tarun; Kulkarni, Ajit R.; Venkataramani, N.; Srinivasan, G.

doi:10.1103/physrevb.85.104404

Cited by 65 publications

(32 citation statements)

References 22 publications

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“…In fact, as suggested by Srinivasan [70], this material exhibits large anisotropy, which limits domain rotation and hence dynamic deformation, while this material exhibits very high saturation magnetostriction (λ S > 300 ppm) [71]. This anisotropy could explain why the magnetoelectric effect is much higher for materials with high permeability and low magnetostriction saturation (λ S ) such as nickel ferrite (NFO), nickel zinc ferrite (NZFO), and manganese zinc ferrite (MZFO) than for materials with low permeability and high λ S such as cobalt ferrite [72][73][74][75][76]. Yet the strain derivative q dc is higher for CFO than for NFO and MZFO, showing that this parameter may not fully and accurately characterize the ME effect.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

et al. 2018

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Applications of magnetostrictive materials commonly involve the use of the dynamic deformation, i.e., the piezomagnetic effect. Usually, this effect is described by the strain derivative ∂λ=∂H, which is deduced from the quasistatic magnetostrictive curve. However, the strain derivative might not be accurate to describe dynamic deformation in semihard materials as cobalt ferrite (CFO). To highlight this issue, dynamic magnetostriction measurements of cobalt ferrite are performed and compared with the strain derivative. The experiment shows that measured piezomagnetic coefficients are much lower than the strain derivative. To point out the direct application of this effect, low-frequency magnetoelectric (ME) measurements are also conducted on bilayers CFO=PbðZr; TiÞO 3 . The experimental data are compared with calculated magnetoelectric coefficients which include a measured dynamic coefficient and result in very low relative error (<5%), highlighting the relevance of using a piezomagnetic coefficient derived from dynamic magnetostriction instead of a strain derivative coefficient to model ME composites. The magnetoelectric effect is then measured for several amplitudes of the alternating field H ac , and a nonlinear response is revealed. Based on these results, a trilayer CFO/PbðZr; TiÞO 3 /CFO is made exhibiting a high magnetoelectric coefficient of 578 mV=A (approximately 460 mV=cm Oe) in an ac field of 38.2 kA=m (about 48 mT) at low frequency, which is 3 times higher than the measured value at 0.8 kA=m (approximately 1 mT). We discuss the viability of using semihard materials like cobalt ferrite for dynamic magnetostrictive applications such as the magnetoelectric effect.

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Section: Introductionmentioning

confidence: 99%

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

et al. 2018

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“…5,12,13 The focus of prior studies on bulk structure has been mainly on understanding the nature of self-bias effect in terms of grading of ferromagnetic composition and bending resonance. 7,9,14 However, these structure present another level of practical difficulty for on-chip components as synthesis process has to account for heterogonous graded structure or two-phase magnetic layers along with flexural deformation. Furthermore, the self-biased effect due to the grading induced build-in field lacks the feasibility for controllable tunability.…”

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confidence: 99%

“…[4][5][6][7][8][9] Alternative approaches have been suggested for the case of thin films that rely on magnetic fielddependence of resonant frequency and angular dependence of exchange bias field. 10,11 This phenomenon is promising for applications such as magnetic field sensor, core-free magnetic flux control device, and electrically controlled magnetic memory devices.…”

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confidence: 99%

Tunable self-biased magnetoelectric response in homogenous laminates

Zhou¹,

Yang²,

Apo³

et al. 2012

Applied Physics Letters

101

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“…Compared to the ME coefficient of 30 mV cm À1 Oe À1 obtained for NKNLS-NZF/Ni/NKNLS-NZF trilayer laminate (40Â), $100 mV cm À1 Oe À1 obtained for Ni-PZN-PZT bilayer laminate (12Â), and $400 mV cm À1 Oe À1 obtained for functionally graded Ni-NZFO-PZT laminate composites (3Â) at zero-bias, our co-fired composite exhibited extremely high response. [24][25][26] Recently, slightly larger zero-bias magnetoelectric coefficient of 1.65 V cm À1 Oe À1 in a quasi-one dimensional ME sensor has been reported at 100 Hz compared to our case (1.47 V cm À1 Oe…”

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confidence: 99%