Tunable exchange bias effect in Sr-doped double perovskite La<sub>2</sub>NiMnO<sub>6</sub>

Guo, Yuqiao; Shi, Lei; Zhou, Shiming; Zhao, Jin; Wang, Cailin; Liu, Wenjie; Wei, Shiqiang

doi:10.1088/0022-3727/46/17/175302

Cited by 67 publications

(34 citation statements)

References 33 publications

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“…We are carrying out further investigations in detail on these optimized ceramics. The presence of exchange bias effect in these compounds at room temperature is another fascinating feature which was also reported in similar systems [4,43,46,47] although at low temperature.…”

Section: Discussionsupporting

confidence: 72%

“…4 (h). The coercive field (H c ) is given by H c = |(H c1 -H c2 )|/2, where H c1 and H c2 are the left and right coercive fields [43,44], respectively as shown also in Fig. 4 (h).…”

Section: Magnetic Characterizationmentioning

confidence: 99%

“…The EB field H EB is generally defined as H EB = -(H c1 +H c2 )/2 where H c1 and H c2 are the left and right coercive fields, respectively as shown by solid circles in Fig. 4 (h) [43,44]. The asymmetry in the magnetization axes is defined as M EB = (M r1 +M r2 )/2 where M r1 and M r2 are the magnetization with positive and negative points of intersection with H = 0, respectively [4].…”

Section: +mentioning

confidence: 99%

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Room temperature dielectric and magnetic properties of Gd and Ti co-doped BiFeO3 ceramics

Basith¹,

Kurni²,

Alam³

et al. 2014

Journal of Applied Physics

110

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Room temperature dielectric and magnetic properties of BiFeO3 samples, co-doped with magnetic Gd and non-magnetic Ti in place of Bi and Fe, respectively, were reported. The nominal compositions of Bi0.9Gd0.1Fe1−xTixO3 (x = 0.00-0.25) ceramics were synthesized by conventional solid state reaction technique. X-ray diffraction patterns revealed that the substitution of Fe by Ti induces a phase transition from rhombohedral to orthorhombic at x > 0.20. Morphological studies demonstrated that the average grain size was reduced from ∼ 1.5 µm to ∼ 200 nm with the increase in Ti content. Due to Ti substitution, the dielectric constant was stable over a wide range of high frequencies (30 kHz to 20 MHz) by suppressing the dispersion at low frequencies. The dielectric properties of the compounds are associated with their improved morphologies and reduced leakage current densities probably due to the lower concentration of oxygen vacancies in the compositions. Magnetic properties of Bi0.9Gd0.1Fe1−xTixO3 (x = 0.00-0.25) ceramics measured at room temperature were enhanced with Ti substitution up to 20 % compared to that of pure BiFeO3 and Ti undoped Bi0.9Gd0.1FeO3 samples. The enhanced magnetic properties might be attributed to the substitution induced suppression of spiral spin structure of BiFeO3. An asymmetric shifts both in the field and magnetization axes of magnetization versus magnetic field (M-H) curves was observed. This indicates the presence of exchange bias effect in these compounds notably at room temperature.

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Section: Discussionsupporting

confidence: 72%

“…4 (h). The coercive field (H c ) is given by H c = |(H c1 -H c2 )|/2, where H c1 and H c2 are the left and right coercive fields [43,44], respectively as shown also in Fig. 4 (h).…”

Section: Magnetic Characterizationmentioning

confidence: 99%

Section: +mentioning

confidence: 99%

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Room temperature dielectric and magnetic properties of Gd and Ti co-doped BiFeO3 ceramics

Basith¹,

Kurni²,

Alam³

et al. 2014

Journal of Applied Physics

110

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“…Along with H EB , the coercive field (H c ) is also quantified by H c ¼ (H c1 À H c2 )/2. 28 The H c values for nanoparticles at 150 K and 250 K are presented in supplementary Table I. 19 At high temperature (250 K), the highest coercivity is 5.1 kOe for a cooling magnetic fields of 60 kOe.…”

Section: Resultsmentioning

confidence: 99%

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

Basith

Khan

Ahmmad

et al. 2015

Journal of Applied Physics

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The exchange bias (EB) effect has been observed in magnetic Bi0.9Gd0.1Fe0.9Ti0.1O3 nanoparticles. The influence of magnetic field cooling on the exchange bias effect has also been investigated. The magnitude of the exchange bias field (HEB) increases with the cooling magnetic field, showing that the strength of the exchange bias effect is tunable by the field cooling. The HEB values are also found to be dependent on the temperature. This magnetically tunable exchange bias obtained at temperatures up to 250 K in Bi0.9Gd0.1Fe0.9Ti0.1O3 nanoparticles may be worthwhile for potential applications.

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“…where H c1 and H c2 are the left and right coercive fields [14], [45] and M r = |(M r1 -M r2 )|/2, where M r1…”

Section: (A) For Comparison M-h Loop Of Undoped Bulk Bfo Ceramic Ismentioning

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 Sr-doped double perovskite La₂NiMnO₆

Cited by 67 publications

References 33 publications

Room temperature dielectric and magnetic properties of Gd and Ti co-doped BiFeO3 ceramics

Room temperature dielectric and magnetic properties of Gd and Ti co-doped BiFeO3 ceramics

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

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

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Tunable exchange bias effect in Sr-doped double perovskite La2NiMnO6

Cited by 67 publications

References 33 publications

Room temperature dielectric and magnetic properties of Gd and Ti co-doped BiFeO3 ceramics

Room temperature dielectric and magnetic properties of Gd and Ti co-doped BiFeO3 ceramics

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

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

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Tunable exchange bias effect in Sr-doped double perovskite La₂NiMnO₆