Structural characterization and ZFC/FC magnetization study of La0.6Ca0.4−xSrxMnO3 nanoparticle compounds

Jeddi, M.; Gharsallah, H.; Bekri, M.; Dhahri, E.; Hlil, E.K.

doi:10.1007/s00339-019-3183-7

Cited by 13 publications

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References 81 publications

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“…Meanwhile, both NSSG and NSSS samples displayed a strong orientation towards the (121) direction with an orthorhombic crystal structure (ICSD reference code: 98-003-7439). Goldschmidt's tolerance factor, tG, is an indicator of the formation of perovskite structures and researchers have been using it to verify the stability and distortion of manganite compounds [7,36,37]. The tolerance factor is defined as:…”

Section: Resultsmentioning

confidence: 99%

“…It can be observed that the unit cell volume of LSMO is greater than NSMO. This increase can be linked to the larger ionic radius of La 3+ (1.30 Å) Goldschmidt's tolerance factor, t G , is an indicator of the formation of perovskite structures and researchers have been using it to verify the stability and distortion of manganite compounds [7,36,37]. The tolerance factor is defined as:…”

Section: Resultsmentioning

confidence: 99%

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The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

et al. 2021

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La0.7Sr0.3MnO3 (LSMO) and Nd0.7Sr0.3MnO3 (NSMO) possess excellent colossal magnetoresistance (CMR). However, research work on the neodymium-based system is limited to date. A comparative study between LSMO and NSMO prepared by sol–gel and solid-state reaction methods was undertaken to assess their structural, microstructural, magnetic, electrical, and magneto-transport properties. X-ray diffraction and structure refinement showed the formation of a single-phase composition. Sol–gel-synthesised NSMO was revealed to be a sample with single crystallite grains and exhibited intriguing magnetic and electrical transport behaviours. Magnetic characterisation highlighted that Curie temperature (TC) decreases with the grain size. Strong suppression of the metal–insulator transition temperature (TMI) was observed and attributed to the magnetically disordered grain surface and distortion of the MnO6 octahedra. The electrical resistivity in the metallic region was fitted with theoretical models, and the conduction mechanism could be explained by the grain/domain boundary, electron–electron, and electron–magnon scattering process. The increase in the scattering process was ascribed to the morphology changes. Enhancement of low-field magnetoresistance (LFMR) was observed in nano-grained samples. The obtained results show that the grain size and its distribution, as well as the crystallite formation, strongly affect the physical properties of hole-doped manganites.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

et al. 2021

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“…[22][23][24] Among these materials, only lanthanum manganites have been fully characterized with a deeper investigation into the structural and magnetic properties. [25][26][27] Neodymium-based manganites seem to be very promising magnetocaloric candidates 28,29 owing to the reason that the magnitude of their magnetic entropy change and the value of their transition temperature can be strongly tuned by controlling their microstructure and their chemical composition following the preparation method. 30 As the magnetocaloric properties of manganites were examined only to a limited extent, the exploration of other systems and new elaboration process inducing an improvement in the magnetocaloric effect is still under the initial stage.…”

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confidence: 99%

Impact of synthesis route on structural, magnetic, magnetocaloric and critical behavior of Nd_0.6Sr_0.4MnO₃manganite

et al. 2021

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“…100 μg of MNPs is required to get a good magnetic output signal due to the diamagnetic contribution of the sample holder.The superparamagnetic behavior of the obtained iron oxide MNPs at room temperature was confirmed as observed from their hysteresis loop with negligible area67 at 300 K (Figure6(a)). Moreover, the maxima of the FC-ZFC plots correspond to the blocking temperature,68 that is, the temperature above which MNPs are in the superparamagnetic regime, being far below 300 K in the case of iron oxide MNPs (Figure6(b)). All the synthesized MNPs doped with manganese, cobalt, and/or zinc also show superparamagnetic behavior at room temperature, as observed from their hysteresis loops and FC-ZFC plots (FigureS24−S27).…”

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Synthesis, Characterization, and Evaluation of Superparamagnetic Doped Ferrites as Potential Therapeutic Nanotools

et al. 2020

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Magnetic nanoparticles (MNPs) are one of the most promising candidates for their use as theranostic agents in the biomedical field due to their potential as contrast agents in magnetic resonance imaging (MRI) and also as heat generators in magnetic hyperthermia treatments. However, despite the large number of publications about this topic, just some few systematic studies about the influence of MNPs composition on their theranostic capabilities have been carried out. In this work, we show a detailed methodology for the preparation of highly monodisperse iron oxide-based MNPs with different cobalt, zinc, and manganese doping extents in the superparamagnetic regime. We aim to provide the tools to control the composition of the particles, as well as for their functionalization to make them highly stable in biological-mimicking media. Procedures to measure the capability of the particles as magnetothermal and MRI negative contrast agents as well as to analyze the influence of doping on such properties are also reported. In all experiments, the applied alternating magnetic fields were within the maximum allowed amplitude, frequency, and amplitude·frequency product range for potential validation of the experimental data toward the potential translation of the present MNPs to the clinical practice.

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Structural characterization and ZFC/FC magnetization study of La0.6Ca0.4−xSrxMnO3 nanoparticle compounds

Cited by 13 publications

References 81 publications

The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

Impact of synthesis route on structural, magnetic, magnetocaloric and critical behavior of Nd_0.6Sr_0.4MnO₃manganite

Synthesis, Characterization, and Evaluation of Superparamagnetic Doped Ferrites as Potential Therapeutic Nanotools

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Structural characterization and ZFC/FC magnetization study of La0.6Ca0.4−xSrxMnO3 nanoparticle compounds

Cited by 13 publications

References 81 publications

The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

Impact of synthesis route on structural, magnetic, magnetocaloric and critical behavior of Nd0.6Sr0.4MnO3manganite

Synthesis, Characterization, and Evaluation of Superparamagnetic Doped Ferrites as Potential Therapeutic Nanotools

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Impact of synthesis route on structural, magnetic, magnetocaloric and critical behavior of Nd_0.6Sr_0.4MnO₃manganite