Magnetoelectric effects in ferrite-lead zirconate titanate layered composites: The influence of zinc substitution in ferrites

Srinivasan, G.; Rasmussen, Ebbe; Hayes, R.W.

doi:10.1103/physrevb.67.014418

Cited by 304 publications

(235 citation statements)

References 10 publications

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“…But a-value was smaller for PZT in the composite and the reduction amounted to as much as 2.5% decrease in the unit cell volume of PZT. Thus x-ray data implies a strain free ferrite and a strained PZT in the heterostructures [7].…”

Section: Methodsmentioning

confidence: 99%

“…Ferrite and PZT were mixed in a ballmill, pressed into pellets and sintered at 1300-1450 K for 1 hr in a traditional furnace. The two phases cosinter well and do not form impurity phases for sintering temperatures below 1500 K [7]. For microwave sintering, samples were placed in a susceptor and heated at 1200 K for 30 min.…”

Section: Methodsmentioning

confidence: 99%

“…Series electrical connectivity gives rise to a high resistivity, negligible leakage current and strong piezoelectric and ME coupling. Significant developments in this regard are the recent observation of giant ME effects in bilayers and multilayers of lanthanum manganite-PZT and nickel ferrite-PZT [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…It is possible to accomplish controlled variations in magnetic parameter with Zn substitution in ferrites [7]. We prepared bulk samples by mixing and sintering powders for the two phases.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic magnetoelectric effects in bulk and layered composites of cobalt zinc ferrite and lead zirconate titanate

et al. 2005

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Low frequency magnetoelectric (ME) coupling has been investigated in bulk and multilayers of cobalt zinc ferrite, Co 1-x Zn x Fe 2 O 4 (x=0-0.6), and lead zirconate titanate. In bulk samples, the transverse and longitudinal couplings are weak and are of equal magnitude. A substantial strengthening of ME interactions is evident in layered structures, with the ME voltage coefficient a factor of 10-30 higher than in bulk samples. Important findings of the studies in layered composites are as follows. (i) The transverse coupling is stronger than the longitudinal coupling. (ii) The strength of ME interactions is dependent on Zn substitution with a maximum for x=0.4. (iii) Analysis of volume and static magnetic field dependence of ME voltage coefficients reveal a weak coupling at the ferromagnetic-piezoelectric interface. (iv) The interface coupling k increases with Zn substitution and k versus x profile shows a maximum centered at x=0.4. (iv) The Zn-assisted enhancement is attributed to efficient magneto-mechanical coupling in the ferrite.PACS IntroductionIn a magnetoelectric (ME) material, an applied magnetic field produces a dielectric polarization or an external electric field results in an induced magnetization [1]. The induced polarization P is related to the magnetic field H by P = α H, where α is the ME-susceptibility. For a single-phase material to be magnetoelectric, one requires a long-range magnetic order and the presence of permanent electric dipoles. The (static) effect, first observed in antiferromagnetic Cr 2 O 3, is weak in single-phase compounds [2]. But a composite of piezomagnetic-piezoelectric phases is also expected to be magnetoelectric since α = δP/δH is a "product-property" that results from magnetostriction induced deformation and piezoelectric charge generation [3][4][5]. We are interested in the dynamic ME effect; for an ac magnetic field δH applied to a biased composite, one measures the induced voltage δV. The ME voltage coefficient α′ E = δV/t′δH and is related to the ME susceptibility through α = ε o ε r α′ E where t′ is the composite thickness and ε r is the relative permittivity.This report is concerned with the synthesis of bulk and layered composites of ferromagneticferroelectric oxides and studies on the nature of magnetoelectric interactions. Composites of interest in the past were bulk samples of nickel ferrite or cobalt ferrite with BaTiO 3 or lead zirconate titanate (PZT) [ 3,4]. Powders of the two oxides are mixed

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…It is possible to accomplish controlled variations in magnetic parameter with Zn substitution in ferrites [7]. We prepared bulk samples by mixing and sintering powders for the two phases.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic magnetoelectric effects in bulk and layered composites of cobalt zinc ferrite and lead zirconate titanate

et al. 2005

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“…5,6 However, single phase multiferroic materials are rare since ferroelectricity in ABO 3 type perovskite oxide requires transition metal ions (B) with d 0 electronic configuration, whereas ferromagnetism requires transition metal ions with odd number of d electrons. This apparent incompatibility can be overcome in materials such as BiFeO 3 , PbFe 0.5 Nb 0.5 O 3 and ABO 3 (A = Y, Tb, Gd, Ho; B=Mn) 7 , where A and B site cations are sources of ferroelectricity and magnetism, respectively.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and magnetoelectric studies in pure and cation doped

Naik

Mahendiran

2009

Solid State Communications

124

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We report the effect of divalent cation (A) substitution on magnetic and magnetoelectric properties in Bi 1-x A x FeO 3 (A= Sr, Ba and Sr 0.5 Ba 0.5 ; x = 0 and 0.3). The rapid increase of magnetization below 100 K and a peak at the Neel temperature T N = 642±2 K found in BiFeO 3 is suppressed in the co-doped sample (A = Sr 0.15 Ba 0.15 ). All the divalent cation doped samples show enhanced magnetization with a well defined hysteresis loop compared to the parent compound. Both longitudinal (L-α ME ) and transverse (T-α ME ) magnetoelectric coefficients with dc magnetic field parallel and perpendicular to the direction of induced voltage, respectively, were measured using dynamic lock-in technique. It is found that the T-α ME increases in magnitude and exceeds the L-α ME with increasing size of the A cation. The maximum T-α ME = 2.1 mV/cmOe in the series is found for A = Sr 0.15 Ba 0.15 , though it is not the compound with the highest saturation magnetization. The observed changes in the magnetoelectric coefficient are suggested to possible modification in the domain structure and magnetoelectric coupling in these compounds.1

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Magnetism in Ancient Societies to the Present

Harris¹

2022

Modern Ferrites

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Magnetoelectric effects in ferrite-lead zirconate titanate layered composites: The influence of zinc substitution in ferrites

Cited by 304 publications

References 10 publications

Dynamic magnetoelectric effects in bulk and layered composites of cobalt zinc ferrite and lead zirconate titanate

Dynamic magnetoelectric effects in bulk and layered composites of cobalt zinc ferrite and lead zirconate titanate

Magnetic and magnetoelectric studies in pure and cation doped

Magnetism in Ancient Societies to the Present

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