Structural and magnetic properties of charge-ordered La0.5-xHoxCa0.5MnO3 (0≤x≤0.15)

Dhieb, S.; Krichene, A.; Boudjada, N. Chniba; Boujelben, W.

doi:10.1016/j.jallcom.2020.153728

Cited by 14 publications

(11 citation statements)

References 34 publications

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“…During the last two decades, intense studies were focused on both charge ordering (CO) and magnetic phase separation phenomena − since the discovery of colossal magnetoresistance in perovskite manganites. Half-doped manganites, R 0.5 A 0.5 MnO 3 (R: rare earth element and A: alkaline earth element), were widely studied.…”

Section: Introductionmentioning

confidence: 99%

Suppression of Metamagnetic Transitions of Martensitic Type by Particle Size Reduction in Charge-Ordered La_0.5Ca_0.5MnO₃

et al. 2020

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In this paper, we have studied the effect of size reduction on charge ordering (CO) and magnetic phase separation in La 0.5 Ca 0.5 MnO 3 . The magnetic ground state at low temperature shifts from ferromagnetic (nanoparticles) to CO-antiferromagnetic (bulk) with increasing annealing temperature. The studied samples exhibit relevant phenomena such as Griffiths phase and training effect. Magnetic field cycling can stabilize ferromagnetic or antiferromagnetic domains, depending on the temperature value as well as the sample's nature. For the compound sintered at 1200 °C, step-like metamagnetic transitions of martensitic type were observed at 4 K, indicating the presence of weak spin-phonon coupling. The disappearance of magnetic phase separation at 4 K (the sample is purely antiferromagnetic) can be a possible origin for the occurrence of such transitions. Lowering the sintering temperature leads to the disappearance of martensitic transitions. The obtained results indicate that the occurrence of step-like metamagnetic transition of martensitic type necessarily requires the onset of a long-range CO-antiferromagnetic state.

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Section: Introductionmentioning

confidence: 99%

Suppression of Metamagnetic Transitions of Martensitic Type by Particle Size Reduction in Charge-Ordered La_0.5Ca_0.5MnO₃

et al. 2020

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“…1 displays the Rietveld refined XRD patterns for La0.5-xHoxCa0.5MnO3 (x = 0.05 and 0.1) samples. Refinement results reveal that all our samples crystallize in the orthorhombic structure with Pnma space group and all the structural parameters are listed in table 1 [6]. In order to take into account the intrinsic strain, the Williamson-Hall method can be used to find the crystallite size DWH and the microstrain ε as follows [26]:…”

Section: Resultsmentioning

confidence: 99%

“…La0.5-xHoxCa0.5MnO3 (x = 0.05 and 0.1) specimens were prepared by sol-gel technique using high-purity (99.9%) La2O3, Ho2O3, CaCO3 and MnO2. The synthesis process was previously described elsewhere [6]. Purity and homogeneity of the samples were confirmed by X-ray powder diffraction (XRD).…”

Section: Methodsmentioning

confidence: 99%

“…This behavior can indicate an enhancement of the charge carriers localization by Ho substitution, which suggests the stabilization of the CO state. The observed behavior can be also attributed to the reduction of eg electron bandwidth [6]. Besides, the increase in activation energy can be linked to structural and morphological properties of studied samples, i.e., the x = 0.1 sample presents higher activation energy compared to x = 0.05 one due to the important grain size, shorter bond angle <θMn-O-Mn> and longer bond length.…”

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confidence: 89%

“…The VRH model explains the hopping of a charge carrier from a localized state another which is not necessarily the nearest neighbor. The expression for this model can be written as: (6) where T0 is the Mott temperature related to the carrier localization lengthens given by:…”

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Stability of charge ordering in La0.5−xHoxCa0.5MnO3 polycrystalline manganites

et al. 2021

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Magnetotransport properties of La0.5-xHoxCa0.5MnO3 (x=0.05 and 0.1) polycrystalline samples were investigated in order to study the effect of magnetic Ho 3+ ions on the stability of the charge ordering (CO) and magnetic phase coexistence in pristine La0.5Ca0.5MnO3. Our samples were synthesized by using sol-gel method. Temperature dependence of resistivity shows an insulating behavior with high resistivity values, confirming the presence of long-range CO. The application of 7 T magnetic field slightly reduces resistivity values and demonstrates relatively small magnetoresistance (MR) values (-MR(T) did not exceed 14 % under 7 T applied field). This observation indicates that the CO in the Ho-based specimens is strong, which indicates that Ho-substitution for La in La0.5Ca0.5MnO3 gives more strength to the CO.

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Electrical, magnetic, and magnetoresistance studies in chromium-doped Pr-based manganites

Sumaiyah,

Ibrahim,

Mohamed

et al. 2024

J Mater Sci: Mater Electron

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Structural and magnetic properties of charge-ordered La0.5-xHoxCa0.5MnO3 (0≤x≤0.15)

Cited by 14 publications

References 34 publications

Suppression of Metamagnetic Transitions of Martensitic Type by Particle Size Reduction in Charge-Ordered La_0.5Ca_0.5MnO₃

Suppression of Metamagnetic Transitions of Martensitic Type by Particle Size Reduction in Charge-Ordered La_0.5Ca_0.5MnO₃

Stability of charge ordering in La0.5−xHoxCa0.5MnO3 polycrystalline manganites

Electrical, magnetic, and magnetoresistance studies in chromium-doped Pr-based manganites

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Structural and magnetic properties of charge-ordered La0.5-xHoxCa0.5MnO3 (0≤x≤0.15)

Cited by 14 publications

References 34 publications

Suppression of Metamagnetic Transitions of Martensitic Type by Particle Size Reduction in Charge-Ordered La0.5Ca0.5MnO3

Suppression of Metamagnetic Transitions of Martensitic Type by Particle Size Reduction in Charge-Ordered La0.5Ca0.5MnO3

Stability of charge ordering in La0.5−xHoxCa0.5MnO3 polycrystalline manganites

Electrical, magnetic, and magnetoresistance studies in chromium-doped Pr-based manganites

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Suppression of Metamagnetic Transitions of Martensitic Type by Particle Size Reduction in Charge-Ordered La_0.5Ca_0.5MnO₃

Suppression of Metamagnetic Transitions of Martensitic Type by Particle Size Reduction in Charge-Ordered La_0.5Ca_0.5MnO₃