Effect of Al3+ modification on cobalt ferrite and its impact on the magnetoelectric effect in BCZT–CFO multiferroic composites

Naveed-Ul-Haq, M.; Shvartsman, Vladimir V.; Constantinescu, G.; Trivedi, Harsh; Salamon, Soma; Landers, Joachim; Wende, Heiko

doi:10.1007/s10853-017-1444-4

Cited by 10 publications

(4 citation statements)

References 44 publications

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“…Indeed, cobalt ferrites are very attractive for this purpose and have been used either in laminated [15,[42][43][44][45][46][47][48][49] or in particulate [50][51][52][53][54][55] composites. The direct ME effect consists of a change in the electric polarization induced by a magnetic field.…”

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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“…ME voltage coefficient of multiferroic composites has been often reported for the dc magnetic field smaller than 6 kOe [11,16,[47][48][49][50][51][52]. Furthermore, despite extensive research on this topic, negative ME response, measured by both the direct and converse methods, has been rarely reported [37,53,54]. From our results, it is deduced that the behavior of α at high magnetic fields is dependent on the type of magn etic phase and its λ(H).…”

Section: Magnetoelectric Propertiesmentioning

confidence: 74%

Complex magnetoelectric effect in multiferroic composites: the case of PFN-PT/(Co,Ni)Fe₂O₄

Mokhtari¹,

Ahmadvand²,

Fesharaki³

et al. 2019

J. Phys. D: Appl. Phys.

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We report a systematic study of the magnetoelectric (ME) voltage coefficient as a complex quantity in the particulate composite of ferroelectric solid solution 0.94Pb(Fe1/2Nb1/2)O3-0.06PbTiO3(PFN-PT) with CoFe2O4(CFO) and NiFe2O4(NFO) ferrites. The results show that the real part of the ME voltage coefficient () is highly influenced by the magnetostrictive phase through . NFO produces larger at a lower magnetic field, which originates from the softer magnetic properties. In addition, was found to be positive for NFO composite, while CFO composite shows a negative ME voltage coefficient at high magnetic fields. We argue that the field dependence of can be interpreted using the dynamic piezomagnetic coefficient, . The imaginary part of the ME voltage coefficient () was also determined for all composites. Both the and show a peak at the same magnetic field, which is attributed to the maximum dynamic piezomagnetism when the magnetic domains are collectively rotated by the dc bias magnetic field. Our results show that the ME voltage coefficient in the composites of PFN-PT/(Co,Ni)Fe2O4 is highly influenced by the content, magnetic softness and field dependence behaviour of magnetostriction of the piezomagnetic phase.

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“…However, these P-E loops do not provide us with clear information about the polarization state of our composites. Naveed et al [10] observed similar kinds of ferroelectric response for their systems but they were able provide microscopic insight of ferroelectric state performing piezoresponse force microscopy (PFM). Also, they were able to obtain good magnetoelectric response of their composites.…”

Section: Resultsmentioning

confidence: 99%

“…Improved multiferroic properties and this is achieved by manufacturing compositions with different BCZT and CAF [10]. The (0.5)BCZT-(0.5)CFO composite gave the higher value for saturation magnetization and also the high strain sensitivity that is around (52 × 10 -9 Oe −1 ) [11].…”

Section: Introductionmentioning

confidence: 99%

Exploring the structural, morphological, and multiferroic properties of Al³⁺ modified (1-x) BCZT-(x) CFO ceramic composites

Hussain,

Dilpazir,

Naveed-Ul-Haq

et al. 2024

Phys. Scr.

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Multiferroics with strong magnetoelectric coupling can be created by improving the magnetostriction of the ferrite phase and combining it with the best known piezoelectric. Herein, the ferromagnetic CoFe2O4 was modified with Al3+ ions (CAF) to further improve the resistivity, magnetic, and magnetostrictive properties and then combined with (0.5)Ba(Zr0.2Ti0.8)O3−(0.5)(Ba0.7Ca0.3)TiO3(BCZT) with different weight percentages. XRD results revealed the presence of a mixed spinel cubic phase for CAF (Fd-3m), whereas BCZT crystallized in a tetragonal structure (Amm2) in composite systems. Composites exhibited well-developed hysteresis loops with no feature of leakage current and dielectric response was consistent with ferroelectric properties. The magnetic response of CAF sample improved significantly which is attributed to preference of Al3+ ions on tetrahedral sites. The magnetization of composites increased as the nonmagnetic BCZT component increased and (0.75)CAF-(0.25)BCZT system had the highest saturation magnetization. We anticipate that these systems will have significantly improved magnetoelectric characteristics than unmodified CF-BCZT system.

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Effect of Al3+ modification on cobalt ferrite and its impact on the magnetoelectric effect in BCZT–CFO multiferroic composites

Cited by 10 publications

References 44 publications

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

Complex magnetoelectric effect in multiferroic composites: the case of PFN-PT/(Co,Ni)Fe₂O₄

Exploring the structural, morphological, and multiferroic properties of Al³⁺ modified (1-x) BCZT-(x) CFO ceramic composites

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Effect of Al3+ modification on cobalt ferrite and its impact on the magnetoelectric effect in BCZT–CFO multiferroic composites

Cited by 10 publications

References 44 publications

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

Dynamic Magnetostriction of CoFe2O4 and Its Role in Magnetoelectric Composites

Complex magnetoelectric effect in multiferroic composites: the case of PFN-PT/(Co,Ni)Fe2O4

Exploring the structural, morphological, and multiferroic properties of Al3+ modified (1-x) BCZT-(x) CFO ceramic composites

Contact Info

Product

Resources

About

Complex magnetoelectric effect in multiferroic composites: the case of PFN-PT/(Co,Ni)Fe₂O₄

Exploring the structural, morphological, and multiferroic properties of Al³⁺ modified (1-x) BCZT-(x) CFO ceramic composites