Structural, electrical and dielectric properties of Bi-doped Pr0.8-xBixSr0.2MnO3 manganite oxides prepared by sol-gel process

Kharrat, A. Ben Jazia; Moussa, Sandra M.; Moutiaa, N.; Khirouni, K.; Boujelben, W.

doi:10.1016/j.jallcom.2017.07.046

Cited by 56 publications

(12 citation statements)

References 39 publications

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“…Such behavior is widely observed in perovskite systems. 48,49 At higher frequencies, however, the value of Z 0 merges for all temperatures. Such observation indicates the presence of space charge polarization, 50 which is released at high temperatures.…”

Section: (E) Complex Impedance Analysismentioning

confidence: 88%

Study of magnetic and electrical properties of Pr_0.65Ca_0.25Ba_0.1MnO₃manganite

et al. 2018

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Section: (E) Complex Impedance Analysismentioning

confidence: 88%

Study of magnetic and electrical properties of Pr_0.65Ca_0.25Ba_0.1MnO₃manganite

et al. 2018

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“…Our compounds were prepared using the sol-gel process using high purity Pr 6 O 11 , Bi 2 O 3 , SrCo 3 and MnO 2 precursors. Details of the experimental conditions were explained in our previous work [18]. Structural quality of the samples was confirmed by the X-ray diffraction (XRD) measurements at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…The difference is usually attributed to the existence of inhomogeneities in the vicinity of T C [10]. [18]. Indeed, the decrease of the particle size induces larger surface-near spins which may have an FM coupling lower than that of bulk grains.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Prediction of magnetic and magnetocaloric properties in $$\hbox {Pr}_{0.8-x}\hbox {Bi}_{x}\hbox {Sr}_{0.2}\hbox {MnO}_{3}$$ Pr 0.8 - x Bi

2019

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In this work, we have investigated the magnetic and magnetocaloric properties of Pr 0.8−x Bi x Sr 0.2 MnO 3 (x = 0, 0.05 and 0.1) polycrystalline manganites prepared by sol-gel route on the basis of a phenomenological model. Temperature dependence of magnetization indicates that all our samples exhibit a second order paramagnetic to ferromagnetic transition with a decrease in temperature. A correlation between experimental results and theoretical analysis based on a phenomenological model is investigated. The magnetic and magnetocaloric measurements are well simulated by this model. Under a magnetic applied field of 5 T, the theoretical absolute values of the maximum of magnetic entropy change S Max are found to be equal to 5.33, 3.33 and 2.97 J kg −1 K −1 for x = 0, 0.05 and 0.1 respectively. The relative cooling power and the specific heat capacity values are also estimated. The predicted results permit us to conclude that our compounds may be promising candidates for magnetic refrigeration at low temperatures.

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“…The resistivity of all the samples was observed to decrease with increasing La substitution indicating enhancement of the double exchange (DE) mechanism in the compound. It has been suggested that Bi 3+ 6s 2 lone pair can produce a local distortion due to hybridization between Bi-6s 2 orbital and O:2p orbital [6]. This hybridization would block the movement of e g electron from Mn 3+ to Mn 4+ through Mn 3+ -O-Mn 4+ bridges.…”

Section: Structural Analysismentioning

confidence: 99%

“…The observed behavior was also suggested due to weakening of Bi-hybridization effect in Bi 0.3 Pr 0.3 Ca 0.4 Mn 0.9 Cr 0.1 O 3 as a result of Cr substitution at Mn-site. The dominant effect of local distortion and hybridization between Bi-6s orbital with O-2p orbital which arise due to 6s 2 lone pair electrons [6] was suggested to be weakened due to enhancement of FM interaction which as a consequence may have reduced some type of blocking effect on electrons. In addition to that, the presence of antiferromagnetic, AFM superexchange interactions between Mn 3+ -O-Mn 3+ , Mn 4+ -O-Mn 4+, Cr 3+ -O-Cr 3+ and Cr 3+ -O-Mn 4 were also reported to favour magnetic inhomogeinity which was suggested to affect the observed MR behavior in Bi 0.3 Pr 0.4 Ca 0.6 Mn 0.9 Cr 0.1 O 3 .…”

Section: Introductionmentioning

confidence: 99%

Effect of La3+ Substitution at Bi-Site on Transport Properties of Bi0.3-xLaxPr0.3Ca0.4Mn0.1Cr0.9MnO3

Ibrahim¹,

Amaran²,

Mohamed³

et al. 2019

IJET

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Magnetic and electronic transport properties of Bi0.3-xLaxPr0.3Ca0.4Mn0.1Cr0.9O3 (0≤x≤0.2) manganites have been investigated by measurements of AC-susceptibility, resistivity and magnetoresistance. The samples were prepared using conventional solid-state synthesis method. Magnetic susceptibility versus temperature measurements showed all samples exhibit ferromagnetic to paramagnetic transition with Curie temperature, Tc enhanced from 111 K (x=0) to 174 K (x=0.2). Electrical resistivity measurements of the samples in zero field showed increase of metal-insulator (MI) transition temperature from 58 K(x=0) to 88 K(x=0.2). The increase in both Tc and TMI indicates enhancement of double exchange (DE) interaction involving Mn3+ and Mn4+ ions as a result of weakening of the hybridization effect between Bi3+ 6s2 lone pair with O orbital due to La3+ substitution. La substitution in the Bi-based compound is suggested reduce MnO6 octahedral distortion hence increasing delocalization of charge carriers. The observed variation in MR behavior due to La substitution indicates the substitution influence the MR mechanism of extrinsic and intrinsic behavior in Bi0.3-xLaxPr0.3Ca0.4Mn0.1Cr0.9O3 .

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Structural, electrical and dielectric properties of Bi-doped Pr0.8-xBixSr0.2MnO3 manganite oxides prepared by sol-gel process

Cited by 56 publications

References 39 publications

Study of magnetic and electrical properties of Pr_0.65Ca_0.25Ba_0.1MnO₃manganite

Study of magnetic and electrical properties of Pr_0.65Ca_0.25Ba_0.1MnO₃manganite

Prediction of magnetic and magnetocaloric properties in $$\hbox {Pr}_{0.8-x}\hbox {Bi}_{x}\hbox {Sr}_{0.2}\hbox {MnO}_{3}$$ Pr 0.8 - x Bi

Effect of La3+ Substitution at Bi-Site on Transport Properties of Bi0.3-xLaxPr0.3Ca0.4Mn0.1Cr0.9MnO3

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Structural, electrical and dielectric properties of Bi-doped Pr0.8-xBixSr0.2MnO3 manganite oxides prepared by sol-gel process

Cited by 56 publications

References 39 publications

Study of magnetic and electrical properties of Pr0.65Ca0.25Ba0.1MnO3manganite

Study of magnetic and electrical properties of Pr0.65Ca0.25Ba0.1MnO3manganite

Prediction of magnetic and magnetocaloric properties in $$\hbox {Pr}_{0.8-x}\hbox {Bi}_{x}\hbox {Sr}_{0.2}\hbox {MnO}_{3}$$ Pr 0.8 - x Bi

Effect of La3+ Substitution at Bi-Site on Transport Properties of Bi0.3-xLaxPr0.3Ca0.4Mn0.1Cr0.9MnO3

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Study of magnetic and electrical properties of Pr_0.65Ca_0.25Ba_0.1MnO₃manganite

Study of magnetic and electrical properties of Pr_0.65Ca_0.25Ba_0.1MnO₃manganite