A study of structural, optical and electrical studies of the composites of ZnFe2O4, BiFeO3 and GaFeO3 compounds

Kharat, Reval Singh; Saleem, M.; Kaurav, Netram; Dagar, H. S.

doi:10.1063/5.0061846

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…In a mixed phase system like this, the grain size can be expressed by the Smith-Zener equation [18],…”

Section: Resultsmentioning

confidence: 99%

“…However, the material's excessively high leakage current precludes its use in practical applications [16]. Several potential mechanisms, such as doping with appropriate elements, adjusting the annealing temperature, and modifying the atmospheric condition during sintering, have been considered; however, no substantial change in leakage current has yet been achieved requiring further research in this area [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Improvement of leakage, magnetic and magnetodielectric properties in cobalt doped gallium ferrite

Jana,

Hait,

Mandal

2023

J. Phys.: Condens. Matter

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Gallium ferrite (GFO) is a magnetoelectric (ME) material, capturing growing attention due to its strong ME coupling at room temperature. However, the application of the material in practical use is hindered due to its high leakage. In this work, the effects of cobalt (Co) substitution at the iron (Fe) sites of GaFe1−x Co x O3 (0.0 ⩽ x ⩽ 0.1) polycrystals on the structure, electric and magnetic properties are investigated in detail. 5 at. wt.% substitution (x = 0.05) with cobalt ions achieves a reduction in leakage current density by four orders of magnitude due to reduced hopping between Fe3+ and Fe2+ ions and suppression of the oxygen vacancy formation. This is supported by higher dielectric constant and lower dielectric loss, as well as a significant difference between grain and grain boundary resistances. Two-phase-like magnetic behavior in magnetic hysteresis loop with enhanced magnetization and two magnetic transition temperatures are observed in the doped samples. All samples exhibited an increase in the magnetodielectric factor, indicating enhanced coupling between magnetic and electrical parameters. By concurrently increasing dielectric, magnetic, and coupling between them, this study describes a viable technique for lowering the most significant impediment to GFO’s usage as a ME device.

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“…In a mixed phase system like this, the grain size can be expressed by the Smith-Zener equation [18],…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of leakage, magnetic and magnetodielectric properties in cobalt doped gallium ferrite

Jana,

Hait,

Mandal

2023

J. Phys.: Condens. Matter

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Enhancement of Curie temperature of gallium ferrite beyond room temperature by the formation of Ga0.8Fe1.2O3−Y3Fe5O12 composite

Hait

Mandal

2023

AIP Advances

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Multiferroic materials with good magneto-electric coupling are of great interest due to their enormous applications in the field of spintronic devices. Magnetoelectric (ME) gallium ferrite is an interesting material due to its room temperature (RT) piezoelectricity and near RT ferrimagnetism along with significant ME coupling (10−11 s/m at 4.2 K). The work aims to increase the magnetic transition temperature (TC) of the material above RT so that the material can have strong ME coupling at room temperature and can be implemented for practical applications. Several earlier reports have shown the magnetic transition temperature of Ga2−xFexO3 increases with higher Fe contents. Hence, we chose to study the properties of Ga2−xFexO3 (GFO) only for x = 1.2. Y3Fe5O12 (YIG) is another material that is RT ferromagnet material with very high resistivity (∼1012 Ω cm). In this work, by forming a GFO-YIG composite with only a 10% concentration of YIG, the phase transition temperature is increased beyond room temperature from ∼289 K for GFO to ∼309 K for 0.9 GFO-0.1 YIG. The remnant magnetization is also enhanced from 0.211 emu/g to 2.82 emu/g reporting a magnetization of ∼8.2 emu/g at 30 kOe.

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A study of structural, optical and electrical studies of the composites of ZnFe2O4, BiFeO3 and GaFeO3 compounds

Cited by 2 publications

References 16 publications

Improvement of leakage, magnetic and magnetodielectric properties in cobalt doped gallium ferrite

Improvement of leakage, magnetic and magnetodielectric properties in cobalt doped gallium ferrite

Enhancement of Curie temperature of gallium ferrite beyond room temperature by the formation of Ga0.8Fe1.2O3−Y3Fe5O12 composite

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