Structural, magnetic and AC susceptibility properties of Dy0.5(Sr1-xCax)0.5MnO3 (0 ≤ x ≤ 0.3) manganites

Hamdi, R.; Tozri, A.; Smari, M.; Nouri, K.; Dhahri, E.; Bessaïs, L.

doi:10.1016/j.molstruc.2018.08.052

Cited by 21 publications

(10 citation statements)

References 26 publications

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“…It is defined as the differential response of magnetization system to an oscillating magnetic field dM/dH [21]. It is characterized by its susceptibility magnitude χ and its phase shift f. It is used generally to investigate a metastable order [33][34][35][36]. The AC susceptibility is a complex value that is given by [33]:…”

Section: Resultsmentioning

confidence: 99%

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Griffiths phase, magnetic memory and ac susceptibility of an antiferromagnetic titanate-based perovskite Er_0.9Sr_0.1Ti_0.975Cr_0.025O₃ system

Hamdi¹,

Smari²,

Bajorek³

et al. 2020

Phys. Scr.

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In this study, we investigated different physical properties of Er0.9Sr0.1Ti0.975Cr0.025O3 titanate prepared by a solid-state reaction that produces a cubic structure with Fd-3m (227) as a space group. Zero-Field Cooled and Field Cooled measurements show a second-order antiferromagnetic transition at Neel temperature TN = 23 K, and the existence of Griffiths phase at around TGP = 132 K. This soft magnetic material depicts a magnetic memory since it ‘remembers’ its thermal history. The relative cooling power of this titanate-based sample was then measured to be around 292.27 J kg−1 at 5 Tesla and 400 J kg−1 at 6 Tesla. However, these values are lower than the RCP value reported for the most magnetic refrigerant Gd, although these results are high enough compared to different perovskite systems. Therefore, Er0.9Sr0.1Ti0.975Cr0.025O3 is a very suitable, environment-friendly magnetic refrigerant.

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Section: Resultsmentioning

confidence: 99%

“…It is characterized by its susceptibility magnitude χ and its phase shift f. It is used generally to investigate a metastable order [33][34][35][36]. The AC susceptibility is a complex value that is given by [33]:…”

Section: Resultsmentioning

confidence: 99%

Griffiths phase, magnetic memory and ac susceptibility of an antiferromagnetic titanate-based perovskite Er_0.9Sr_0.1Ti_0.975Cr_0.025O₃ system

Hamdi¹,

Smari²,

Bajorek³

et al. 2020

Phys. Scr.

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“…The reliability factors obtained from the Rietveld refinement are the profile factor Rp(%) = 5.91, the weighted profile factor Rwp(%) = 8.48, the structure factor RF(%)= 3.52, and the goodness of fit χ 2 (%)= 3.44 corresponded well with the literature. The average grains size was estimated from the XRD peaks using the following Scherer formula [25]:…”

Section: Structural and Morphological Analysesmentioning

confidence: 99%

Synthesis and study of impendence spectroscopy properties of La0.6Ca0.2Na0.2MnO3 manganite perovskite prepared using sol–gel method

Alresheedi

Hcini

Bouazizi

et al. 2020

J Mater Sci: Mater Electron

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La0.6Ca0.2Na0.2MnO3 manganite was prepared using sol-gel method. Rietveld refinement of XRD pattern indicates that the prepared sample crystallizes in the rhombohedral 𝑅3𝑐 structure. The impendence spectroscopy properties of the sample were studied by performing a series of measurements as a function of temperature and frequency of conductivity, dielectric constants, modulus and impedance. From these measurements, the metal-semiconductor behaviour was observed for the sample at a transition temperature of the order of 240 K. The studies of imaginary part of permittivity and tangent loss reveal that the prepared material may be a good candidate for low-frequency energy storage devices. An electrical relaxation phenomenon with non-Debye nature was observed in variations of imaginary parts of modulus and impedance. Electrical parameters deduced from the Nyquist plots analyses using an equivalent circuit reveal that the conduction process for the sample was caused due to the grain boundaries contribution.

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“…Because RMnO 3 materials have the same crystal structure and their magnetic phase diagrams can be controlled by modulating the effective R ion radius by partial substitution of lanthanoids, RMnO 3 nanoparticles are an excellent testbed to study the effect of R ion size on magnetic properties. Previous studies have reported that nanoparticles of DyMnO 3 with a particle size of 8.6−106 nm, 44,45 GdMnO 3 with a particle size of 52−270 nm, 46−49 and TbMnO 3 with a particle size of 25 nm to 3 μm 50−52 exhibited different behaviors from bulk crystals owing to changes in the particle size. In the case of RMnO 3 bulk crystals, the magnetic properties and crystal structure have been investigated as a function of lanthanoid ionic radius; however, to the best of our knowledge, there have been no reports comparing the size dependence of magnetic properties and the crystal structure of RMnO 3 nanoparticles with similar particle size (approximately 10 nm) and different R ions.…”

Section: ■ Introductionmentioning

confidence: 99%

Characteristic Size Effects on the Crystallographic Structure and Magnetic Properties of RMnO₃ (R = Eu, Gd, Tb, Dy) Nanoparticles

et al. 2021

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We synthesized lanthanoid manganese oxide RMnO 3 (R = Eu, Gd, Tb, and Dy) nanoparticles with particle sizes ranging from approximately 6.5 to 23 nm and investigated both their crystal structure and magnetic properties. The RMnO 3 nanoparticles showed a strong correlation between crystal structure and magnetic properties, and particle size effects on these properties vary owing to the different atomic radii of the lanthanoid ions. The magnetic properties of all of the nanoparticles exhibited significant changes as the lattice constants changed at characteristic sizes that depend on the lanthanoid ionic radius; however, the characteristic size for magnetic properties corresponded to the magnitude of the orthorhombic distortion b/a = 1.10, regardless of the lanthanoid ionic radius. With decreasing particle size, EuMnO 3 , GdMnO 3 , and TbMnO 3 nanoparticles induced tensile strain of MnO 6 octahedra, whereas compressive strain occurred in DyMnO 3 nanoparticles. The deformation of MnO 6 octahedra changed the magnetic interactions, resulting in changes in the magnetic properties. As the particle size decreased, for R = Eu, Gd, and Tb, the magnetic properties, such as transition temperature, coercive field, and blocking temperature, decreased; conversely, these values increased in DyMnO 3 . The distortion of the unit cell induced changes in the magnetic ordering state due to decreasing particle size.

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Structural, magnetic and AC susceptibility properties of Dy0.5(Sr1-xCax)0.5MnO3 (0 ≤ x ≤ 0.3) manganites

Cited by 21 publications

References 26 publications

Griffiths phase, magnetic memory and ac susceptibility of an antiferromagnetic titanate-based perovskite Er_0.9Sr_0.1Ti_0.975Cr_0.025O₃ system

Griffiths phase, magnetic memory and ac susceptibility of an antiferromagnetic titanate-based perovskite Er_0.9Sr_0.1Ti_0.975Cr_0.025O₃ system

Synthesis and study of impendence spectroscopy properties of La0.6Ca0.2Na0.2MnO3 manganite perovskite prepared using sol–gel method

Characteristic Size Effects on the Crystallographic Structure and Magnetic Properties of RMnO₃ (R = Eu, Gd, Tb, Dy) Nanoparticles

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Structural, magnetic and AC susceptibility properties of Dy0.5(Sr1-xCax)0.5MnO3 (0 ≤ x ≤ 0.3) manganites

Cited by 21 publications

References 26 publications

Griffiths phase, magnetic memory and ac susceptibility of an antiferromagnetic titanate-based perovskite Er0.9Sr0.1Ti0.975Cr0.025O3 system

Griffiths phase, magnetic memory and ac susceptibility of an antiferromagnetic titanate-based perovskite Er0.9Sr0.1Ti0.975Cr0.025O3 system

Synthesis and study of impendence spectroscopy properties of La0.6Ca0.2Na0.2MnO3 manganite perovskite prepared using sol–gel method

Characteristic Size Effects on the Crystallographic Structure and Magnetic Properties of RMnO3 (R = Eu, Gd, Tb, Dy) Nanoparticles

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Product

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Griffiths phase, magnetic memory and ac susceptibility of an antiferromagnetic titanate-based perovskite Er_0.9Sr_0.1Ti_0.975Cr_0.025O₃ system

Griffiths phase, magnetic memory and ac susceptibility of an antiferromagnetic titanate-based perovskite Er_0.9Sr_0.1Ti_0.975Cr_0.025O₃ system

Characteristic Size Effects on the Crystallographic Structure and Magnetic Properties of RMnO₃ (R = Eu, Gd, Tb, Dy) Nanoparticles