Frequency-temperature dependent dynamics of dielectrics in ferric oxoborate Fe3BO6 of cocktail structure of nanorods

Kumari, K. Maharaj; Ram, S.; Kotnala, R.K.

doi:10.1080/09500839.2011.587465

Cited by 7 publications

(2 citation statements)

References 43 publications

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“…The small LaFeO 3 crystallites with a surface charge layer exhibit pretty large r -value, 32,000 at ∼100 Hz frequency at room temperature, compatible to most of the well-known high-r dielectrics. [30][31][32][33][34] Such high r -value can arise on a model resistor-capacitor network designs in terms of a bonded surface layer on the LaFeO 3 crystallites. This novel result supports model algorithms proposed recently by the Almond group, 35-37 wherein a similar microstructural electrical network describes r -dynamics in a complex relation to temperature and frequency that monitor dielectrics and conductors.…”

Section: Magnetoelectrics In Lafeo 3 Nanocrystallitesmentioning

confidence: 99%

A Liquid-Precursor Synthesis of Single-Phase Magnetoelectric LaFeO3 Nanocrystallites

Bhargav¹,

Ram²,

Majumder³

2011

Mat Express

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LaFeO 3 , a nontoxic and thermally stable compound, when prepared of small crystallites offers tailored magnetic and magnetoelectric properties at room temperature. In this article, we describe synthesis of a phase pure LaFeO 3 of nanocrystallites with a bonded carbon surface layer from a liquid precursor at moderate temperature in air. The results demonstrate that, upon sonication and microwave heating, the metal ions La 3+ and Fe 3+ in an inorganic-organic precursor cluster and grow into LaFeO 3 crystallites in a specific shape of nanoplates, typically 40-150 nm in width and 15-25 nm in thickness, at moderate temperature ∼700 C in ambient air. The stable phase LaFeO 3 stands in an orthorhombic crystal structure (Pnma space group), on sintering to obtain useful ferroelectric properties in a dense pellet. At room temperature, a sintered pellet (at 950 C for 4 h) measures a wide ferroelectric hysteresis loop, showing a polarization of 2.05 C/cm 2 , remnant polarization of 0.78 C/cm 2 , and coercivity 7.65 kV/cm for an applied electric field up to 18 kV/cm (at 500 Hz). These values are compatible to those known in important granular multiferroics such as BiFeO 3 and composites.

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Section: Magnetoelectrics In Lafeo 3 Nanocrystallitesmentioning

confidence: 99%

A Liquid-Precursor Synthesis of Single-Phase Magnetoelectric LaFeO3 Nanocrystallites

Bhargav¹,

Ram²,

Majumder³

2011

Mat Express

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“…6 Quite good numbers of studies are carried in authors' laboratory on the iron borate glasses with varieties of additives that yield small fibrils of ferrites and iron borates with tailored magnetic as well as dielectric properties. [18][19][20][21][22] In view to this, a new facile synthesis method is developed to obtain a single phase Fe 3 BO 6 crystallites in the shape of nanoplates. Prepared sample have been characterized in terms of XRD pattern in correlation to the FESEM image to confirm the findings.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and dielectric properties of Fe₃BO₆ nanoplates prepared through self-combustion method

Kumari

2017

J. Adv. Dielect.

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In the present investigation, a facile synthesis method is explored involving a self-combustion of a solid precursor mixture of iron oxide Fe 2 O 3 and boric acid (H 3 BO 3 ) using camphor (C 10 H 16 O) as fuel in ambient air in order to form a single phase Fe 3 BO 6 crystallites. X-ray diffraction (XRD), Field emission electron microscopy (FESEM), magnetic, and dielectric properties of as prepared sample are studied. From XRD pattern, a single phase compound is observed with an orthorhombic crystal structure (Pnma space group), with average crystallite size of 42 nm. A reasonably uniform size distribution of the plates and self-assemblies is retained in the sample. A magnetic transition is observed in dielectric permittivity (at $445 K) and power loss (at $435 K) when plotted against temperature. A weak peak occurs near 330 K due to the charge reordering in the sample. For temperatures above the transition temperature, a sharp increase of the dielectric loss is observed which occurs due to the presence of thermally activated charge carriers. A canted antiferromagnetic Fe 3þ ordering in a Fe 3 BO 6 lattice with a localized charge surface layer is an apparent source of exhibiting a ferroelectric feature in this unique example of a centrosymmetric compound. An induced spin current over the Fe sites thus could give rise to a polarization hysteresis loop. Due to the presence of both ferromagnetic as well as polarization ordering, Fe 3 BO 6 behaves like a single phase multiferroic ceramics.

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Impedance spectroscopy study of zinc oxide incorporated iron borate glass-ceramic

Ramteke

Kumari

Bhattacharya

et al. 2021

Current Applied Physics

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Frequency-temperature dependent dynamics of dielectrics in ferric oxoborate Fe₃BO₆ of cocktail structure of nanorods

Cited by 7 publications

References 43 publications

A Liquid-Precursor Synthesis of Single-Phase Magnetoelectric LaFeO<SUB>3</SUB> Nanocrystallites

A Liquid-Precursor Synthesis of Single-Phase Magnetoelectric LaFeO<SUB>3</SUB> Nanocrystallites

Magnetic and dielectric properties of Fe₃BO₆ nanoplates prepared through self-combustion method

Impedance spectroscopy study of zinc oxide incorporated iron borate glass-ceramic

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Frequency-temperature dependent dynamics of dielectrics in ferric oxoborate Fe3BO6 of cocktail structure of nanorods

Cited by 7 publications

References 43 publications

A Liquid-Precursor Synthesis of Single-Phase Magnetoelectric LaFeO<SUB>3</SUB> Nanocrystallites

A Liquid-Precursor Synthesis of Single-Phase Magnetoelectric LaFeO<SUB>3</SUB> Nanocrystallites

Magnetic and dielectric properties of Fe3BO6 nanoplates prepared through self-combustion method

Impedance spectroscopy study of zinc oxide incorporated iron borate glass-ceramic

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Product

Resources

About

Frequency-temperature dependent dynamics of dielectrics in ferric oxoborate Fe₃BO₆ of cocktail structure of nanorods

Magnetic and dielectric properties of Fe₃BO₆ nanoplates prepared through self-combustion method