Tunable exchange bias effect in magnetic Bi0.9Gd0.1Fe0.9Ti0.1O3 nanoparticles at temperatures up to 250 K

Basith, M. A.; Khan, F.A.; Ahmmad, Bashir; Kubota, Shigeru; Hirose, Fumihiko; Ngo, Duc‐The; Hung, Tran Quang; Mølhave, Kristian

doi:10.1063/1.4926424

Cited by 33 publications

(37 citation statements)

References 38 publications

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“…The M −H hysteresis loops of undoped BFO, Gd doped BFO and Gd-Ti co-doped BFO multiferroic ceramics were investigated using a Superconducting Quantum Interference Device (SQUID) Magnetometer (Quantum Design MPMS-XL7, USA). The temperature dependent magnetization measurements were investigated both at zero field cooling (ZFC) and field cooling (FC) processes [22]. The leakage current density and ferroelectric polarization of the pellet shaped samples were traced using a ferroelectric loop tracer in conjunction with an external amplifier (10 kV).…”

Section: Methodsmentioning

confidence: 99%

The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material

Basith

Billah

Jalil

et al. 2017

Journal of Alloys and Compounds

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In this investigation, undoped BiFeO3, Gd doped Bi0.9Gd0.1FeO3, and Gd-Ti co-doped Bi0.9Gd0.1Fe1−xTixO3 (x = 0.10, 0.20) materials were synthesized to report their multiferroic properties. The structural analysis and phase identification of these multiferroic ceramics were performed using Rietveld refinement. The Rietveld analysis has confirmed the high phase purity of the 10% Gd-Ti co-doped Bi0.9Gd0.1Fe0.9Ti0.1O3 sample compared to that of other compositions under investigation. The major phase of this particular composition is of rhombohedral R3c type structure (wt% > 99%) with negligible amount of impurity phases. In terms of characterization, we address magnetic properties of this co-doped ceramic system by applying substantially higher magnetic fields than that applied in previously reported investigations. The dependence of temperature and maximum applied magnetic fields on their magnetization behavior have also been investigated. Additionally, the leakage current density has been measured to explore its effect on the ferroelectric properties of this multiferroic system. The outcome of this investigation suggests that the substitution of 10% Gd and Ti in place of Bi and Fe, respectively, in BiFeO3 significantly enhances its multiferroic properties. The improved properties of this specific composition is associated with homogeneous reduced grain size, significant suppression of impurity phases and reduction in leakage current density which is further asserted by polarization vs. electric field hysteresis loop measurements.

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Section: Methodsmentioning

confidence: 99%

The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material

Basith

Billah

Jalil

et al. 2017

Journal of Alloys and Compounds

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“…An indication for the presence of mixed magnetic phases and interaction between them are justified by the observed H E B values. 8,41 The diminishing EB field in response to decreasing particle size as shown in the figure 4(c) indicates the waning of AFM-FM interaction which also justifies the corresponding disappearance of metamagnetic transition in BBFO nanoparticles with reducing particle size.…”

Section: -9mentioning

confidence: 99%

“…41,42 Figure 4(c) displays the variation of exchange bias, H E B and coercive field, H c as affected by particle size. The figure reveals that 49 nm BBFO nanoparticles show significantly high H c and EB field which decreases with reducing particle size.…”

Section: -9mentioning

confidence: 99%

Size dependent magnetic and electrical properties of Ba-doped nanocrystalline BiFeO3

et al. 2016

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Improvement in magnetic and electrical properties of multiferroic BiFeO3 in conjunction with their dependence on particle size is crucial due to its potential applications in multifunctional miniaturized devices. In this investigation, we report a study on particle size dependent structural, magnetic and electrical properties of sol-gel derived Bi0.9Ba0.1FeO3 nanoparticles of different sizes ranging from ∼ 12 to 49 nm. The substitution of Bi by Ba significantly suppresses oxygen vacancies, reduces leakage current density and Fe 2+ state. An improvement in both magnetic and electrical properties is observed for 10 % Ba-doped BiFeO3 nanoparticles compared to its undoped counterpart. The saturation magnetization of Bi0.9Ba0.1FeO3 nanoparticles increase with reducing particle size in contrast with a decreasing trend of ferroelectric polarization. Moreover, a first order metamagnetic transition is noticed for ∼ 49 nm Bi0.9Ba0.1FeO3 nanoparticles which disappeared with decreasing particle size. The observed strong size dependent multiferroic properties are attributed to the complex interaction between vacancy induced crystallographic defects, multiple valence states of Fe, uncompensated surface spins, crystallographic distortion and suppression of spiral spin cycloid of BiFeO3.

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“…Most importantly, a significant improvement in magnetic and ferroelectric properties were observed in the undoped and cation doped BFO nanoparticles with particle size less than periodicity of helical order ∼62 nm [15]- [18] compared to that of parent BFO. In previous investigations, we also observed improved structural and magnetic properties for Gd doped and Gd-Ti co-doped BFO nanoparticles compared to their corresponding bulk ceramics [16], [17]. Withstanding the fact that improved multiferroic properties of undoped and cation doped BFO nanoparticles were reported in various investigations [18]- [22], the associated jeopardy was that rigorous synthesis procedure had to be adopted to obtain nanoparticles with sizes less than 62 nm.…”

Section: Introductionmentioning

confidence: 99%

Dy doped BiFeO 3 : A bulk ceramic with improved multiferroic properties compared to nano counterparts

Chowdhury

Kamal

Hossain

et al. 2017

Ceramics International

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The synthesis as well as structural, multiferroic and optical characterization of Dy doped BiFeO3 multiferroic ceramic are presented. Bulk polycrystalline Bi0.9Dy0.1FeO3 sample is synthesized by solid state reaction, while their nano counterparts are prepared using ultrasonic probe sonication technique.Significant improvement of phase purity in the as synthesized samples is observed after the doping of Dy both in bulk Bi0.9Dy0.1FeO3 sample and corresponding nanoparticles as evidenced from Rietveld refinement. Magnetization measurements using SQUID magnetometer exhibit enhanced magnetic properties for Dy doped bulk Bi0.9Dy0.1FeO3 ceramic compared to their nanostructured counterparts as well as undoped BiFeO3. Within the applied field range, saturation polarization is observed for Bi0.9Dy0.1FeO3 bulk ceramic only. As a result, intrinsic ferroelectric behavior is obtained just for this arXiv:1706.10226v1 [cond-mat.mes-hall]

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Tunable exchange bias effect in magnetic Bi0.9Gd0.1Fe0.9Ti0.1O3 nanoparticles at temperatures up to 250 K

Cited by 33 publications

References 38 publications

The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material

The 10% Gd and Ti co-doped BiFeO3: A promising multiferroic material

Size dependent magnetic and electrical properties of Ba-doped nanocrystalline BiFeO3

Dy doped BiFeO 3 : A bulk ceramic with improved multiferroic properties compared to nano counterparts

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