Compositionally graded bismuth ferrite thin films

Wu, Jiagang; Wang, John; Xiao, Dingquan; Zhu, Jianguo

doi:10.1016/j.jallcom.2011.05.076

Cited by 5 publications

(2 citation statements)

References 32 publications

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“…Amongst the few single-phase roomtemperature magnetoelectric materials which have been reported, perovskite type BiFeO 3 and BiMnO 3 are most important. Out of these two, BiFeO 3 has attained prominence both in ceramic as well as thin film forms [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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Nanostructures of Sr²⁺doped BiFeO₃multifunctional ceramics with tunable photoluminescence and magnetic properties

Mandal

Rakshit

Ray

et al. 2013

J. Phys.: Condens. Matter

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Careful tuning of formation (calcination) temperature of Sr(2+) doped BiFeO(3) multiferroic ceramics results in tailorable particle morphologies ranging from spherical to pillar-like. Based on the minimization of Gibb's free energy approach, the dominant homogeneous mechanism for particle growth is suggested. The chemical substitution of a trivalent ion (Bi(3+)) by a divalent ion (Sr(2+)) causes the transformation of certain fraction of Fe(3+) to Fe(4+) and/or the appearance of oxygen vacancies. This has been respectively proved by the analysis of XPS and refinement of neutron diffraction data. Although significant modification in the particle morphology is observed, the crystal unit cell remains rhombohedral with a R3c space group but interesting variations in physical properties are achieved. O-vacancies induced strong and sharp photoluminescence activity in the IR region, similar to ZnO, is reported for the first time. This observation opens up a new application for multiferroic ceramics. SQUID M-H data confirms the straightening of the canted spin structure of BiFeO(3), which in turn results in magnetism similar to ferromagnetic materials. Findings of the magneto-dielectric effect are also discussed to claim the multiferroic nature of the sample.

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Section: Introductionmentioning

confidence: 99%

“…BiFeO 3 shows higher ferroelectric polarization, with a Curie temperature (T c ) of ∼1100 K and an antiferromagnetic Neel temperature (T N ) of ∼640 K [6,9]. Bulk BiFeO 3 , at room temperature, has a rhombohedral unit cell with R3c space group [10,11].…”

Section: Introductionmentioning

confidence: 99%

Nanostructures of Sr²⁺doped BiFeO₃multifunctional ceramics with tunable photoluminescence and magnetic properties

Mandal

Rakshit

Ray

et al. 2013

J. Phys.: Condens. Matter

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Structure and optical properties of BiFe1−xZnxO3 thin films fabricated by pulsed laser deposition

et al. 2012

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Comparative performance of fluorite-structured materials for nanosupercapacitor applications

Magagnin,

Bouaziz,

Le Berre

et al. 2024

APL Materials

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Over the last fifteen years, ferroelectric (FE) and antiferroelectric (AFE) ultra-thin films based on fluorite-structured materials have drawn significant attention for a wide variety of applications requiring high integration density. AFE ZrO2, in particular, holds significant promise for nanosupercapacitors, owing to its potential for high energy storage density (ESD) and high efficiency (η). This work assesses the potential of high-performance Hf1−xZrxO2 thin films encapsulated by TiN electrodes that show linear dielectric (LD), FE, and AFE behavior. A wake-up effect is observed for AFE ZrO2, a phenomenon barely reported for pure zirconium oxide and AFE materials in general, correlated with the disappearance of the pinched hysteresis loop commonly observed for Zr-doped HfO2 thin films. ESD and η are compared for FE, AFE, and LD samples at the same electrical field (3.5 MV/cm). As expected, ESD is higher for the FE sample (95 J/cm3), but η is ridiculously small (≈55%) because of the opening of the FE hysteresis curve, inducing high loss. Conversely, LD samples exhibit the highest efficiency (nearly 100%), at the expense of a lower ESD. AFE ZrO2 thin film strikes a balance between FE and LD behavior, showing reduced losses compared to the FE sample but an ESD as high as 52 J/cm3 at 3.5 MV/cm. This value can be further increased up to 84 J/cm3 at a higher electrical field (4.0 MV/cm), with an η of 75%, among the highest values reported for fluorite-structured materials, offering promising perspectives for future optimization.

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Compositionally graded bismuth ferrite thin films

Cited by 5 publications

References 32 publications

Nanostructures of Sr²⁺doped BiFeO₃multifunctional ceramics with tunable photoluminescence and magnetic properties

Nanostructures of Sr²⁺doped BiFeO₃multifunctional ceramics with tunable photoluminescence and magnetic properties

Structure and optical properties of BiFe1−xZnxO3 thin films fabricated by pulsed laser deposition

Comparative performance of fluorite-structured materials for nanosupercapacitor applications

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Compositionally graded bismuth ferrite thin films

Cited by 5 publications

References 32 publications

Nanostructures of Sr2+doped BiFeO3multifunctional ceramics with tunable photoluminescence and magnetic properties

Nanostructures of Sr2+doped BiFeO3multifunctional ceramics with tunable photoluminescence and magnetic properties

Structure and optical properties of BiFe1−xZnxO3 thin films fabricated by pulsed laser deposition

Comparative performance of fluorite-structured materials for nanosupercapacitor applications

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Nanostructures of Sr²⁺doped BiFeO₃multifunctional ceramics with tunable photoluminescence and magnetic properties

Nanostructures of Sr²⁺doped BiFeO₃multifunctional ceramics with tunable photoluminescence and magnetic properties