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Unravelling the nature of magneto-electric coupling in room temperature multiferroic particulate (PbFe_0.5Nb_0.5O₃)-(Co_0.6Zn_0.4Fe_1.7Mn_0.3O₄) composites.

ABSTRACT: Multiferroic composites are promising candidates for magnetic field sensors, next-generation low power memory and spintronic devices, as they exhibit much higher magnetoelectric (ME) coupling and coupled ordering parameters compared to the single-phase multiferroics. Hence, the 3-0 type particulate multiferroic composites having general formula (1 - ?)[PbFe_0.5Nb_0.5O₃]-?[Co_0.6Zn_0.4Fe_1.7Mn_0.3O₄] (??=?0.0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 1.0, (1 - ?) PFN-?CZFMO) were prepared using a hybrid synthesis technique. Preliminary structural and microstructural analysis were carried out using XRD and FESEM techniques, which suggest the formation of 3-0 type particulate composite without the presence of any impurity phases. The multiferroic behaviour of the composites is studied with polarization versus electric field (P-E) and magnetization versus magnetic field (M-H) characteristics at room temperature. The nature of ME coupling was investigated elaborately by employing the Landau free energy equation along with the magneto-capacitance measurement. This investigation suggests the existence of biquadratic nature of ME coupling (P²M²). The magneto-electric coupling measurement also suggests that strain mediated domain coupling between the ferroelectric and magnetic ordering is responsible for the magneto-electric behaviour. The obtained value of direct ME coefficient 26.78 mV/cm-Oe for ??=?0.3, found to be higher than the well-known single-phase materials and polycrystalline composites.

SUBMITTER: Bhoi K

PROVIDER: S-EPMC7862596 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Unravelling the nature of magneto-electric coupling in room temperature multiferroic particulate (PbFe0.5Nb0.5O3)-(Co0.6Zn0.4Fe1.7Mn0.3O4) composites.

Bhoi Krishnamayee K Mohanty H S HS Ravikant Abdullah Md F MF Pradhan Dhiren K DK Babu S Narendra SN Singh A K AK Vishwakarma P N PN Kumar A A Thomas R R Pradhan Dillip K DK

Scientific reports 20210204 1

Multiferroic composites are promising candidates for magnetic field sensors, next-generation low power memory and spintronic devices, as they exhibit much higher magnetoelectric (ME) coupling and coupled ordering parameters compared to the single-phase multiferroics. Hence, the 3-0 type particulate multiferroic composites having general formula (1 - Φ)[PbFe0.5Nb0.5O3]-Φ[Co0.6Zn0.4Fe1.7Mn0.3O4] (Φ = 0.0, 0.05, ...[more]

PMID: 33542285

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Project description:The further development of solid oxide fuel and electrolysis cells (SOFC/SOEC) strongly relies on research activities dealing with electrode materials. Recent studies showed that under operating conditions many perovskite-type oxide electrodes are prone to changes of their surface composition, leading to severe changes of their electrochemical performance. This results in a large scatter of data in literature and complicates comparison of materials. Moreover, little information is available on the potentially excellent properties of surfaces immediately after preparation, that is, before any degradation by exposure to other gas compositions or temperature changes. Here, we introduce in situ impedance spectroscopy during pulsed laser deposition (IPLD) as a new method for electrochemical analysis of mixed ionic and electronic conducting (MIEC) thin films during growth. First, this approach can truly reveal the properties of as-prepared MIEC electrode materials, since it avoids any alterations of their surface between preparation and investigation. Second, the measurements during growth give information on the thickness dependence of film properties. This technique is applied to La0.6Sr0.4CoO3-? (LSC), one of the most promising SOFC/SOEC oxygen electrode material. From the earliest stages of LSC film deposition on yttria-stabilized zirconia (YSZ) to a fully grown thin film of 100 nm thickness, data are gained on the oxygen exchange kinetics and the defect chemistry of LSC. A remarkable reproducibility is found in repeated film growth experiments, not only for the bulk related chemical capacitance but also for the surface related polarization resistance (±10%). Polarization resistances of as-prepared LSC films are extraordinarily low (2.0 ? cm2 in 40 ?bar O2 at 600 °C). LSC films on YSZ and on La0.95Sr0.05Ga0.95Mg0.05O3-? (LSGM) single crystals exhibit significantly different electrochemical properties, possibly associated with the tensile strain of LSC on LSGM.

Dataset Information

Unravelling the nature of magneto-electric coupling in room temperature multiferroic particulate (PbFe_0.5Nb_0.5O₃)-(Co_0.6Zn_0.4Fe_1.7Mn_0.3O₄) composites.

Publications

Unravelling the nature of magneto-electric coupling in room temperature multiferroic particulate (PbFe<sub>0.5</sub>Nb<sub>0.5</sub>O<sub>3</sub>)-(Co<sub>0.6</sub>Zn<sub>0.4</sub>Fe<sub>1.7</sub>Mn<sub>0.3</sub>O<sub>4</sub>) composites.

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