Role of coupling divalent cations on the physical properties of SmFeO3 prepared by citrate auto-combustion technique

Ateia, Ebtesam E.; Arman, M. M.; Badawy, Eslam

doi:10.1007/s00339-019-2795-2

Cited by 10 publications

(4 citation statements)

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“…The weak anisotropy of Sm 0.95 Ho 0.05 FeO 3 is due to the non-collinearity (canting) of spins on their surface [42]. Ateia et al [14] used the citrate auto-combustion method to prepare SmFeO 3 and found that the saturation magnetization was 0.639 emu/g. In the present study, the maximum magnetization of Ho-doped SmFeO 3 increased four times that of SmFeO 3 as a result of the substitution of Ho 3+ ions (10.3 μ B ) instead of Sm 3+ ions (1.6 μ B ) [43].…”

Section: Homentioning

confidence: 99%

“…Rare earth orthoferrites usually have a distorted orthorhombic structure with the Pbnm space group [6,8,12]. In this structure, the rare earth cation R 3+ has 12 coordination numbers, while Fe ions coordinate with six O 2− anions, forming FeO 6 octahedra [13,14]. The tilting and distortion of FeO 6 affect the ionic radii of rare earth cations.…”

Section: Introductionmentioning

confidence: 99%

“…SmFeO 3 is one of the rare earth orthoferrite materials. It has attracted great attention from researchers due to its properties, such as the antiferromagnetic properties with weak ferromagnetism, the highest spin reorientation transition temperature (470 K), the particle size-affected dielectric constant and piezoelectricity at room temperature [14]. The magnetic properties of SmFeO 3 originate from three magnetic interactions, i.e., rare earth-rare earth (R 3+ -R 3+ ), rare earth-iron (R 3+ -Fe 3+ ) and iron-iron (Fe 3+ -Fe 3+ ) interactions [1,15].…”

Section: Introductionmentioning

confidence: 99%

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Preparation, characterization and magnetic properties of Sm0.95Ho0.05FeO3 nanoparticles and their application in the purification of water

Arman

2022

Appl. Phys. A

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Sm0.95Ho0.05FeO3 was successfully prepared in a single phase using the citrate combustion method. The investigated sample was characterized using X-ray diffraction (XRD), a high-resolution transmission electron microscope (HRTEM) and X-ray photoemission spectroscopy (XPS). XRD confirmed that the sample was synthesized in an orthorhombic phase with an average crystallite size of 12 nm. HRTEM indicated that the sample was prepared in the nanoscale with an average particle size of 18 nm. XPS was used to identify the chemical bonds, binding energies and core levels of Sm0.95Ho0.05FeO3. The magnetic properties were studied using a vibrating sample magnetometer and DC magnetic susceptibility using Faraday’s method. The sample has an antiferromagnetic behavior with weak ferromagnetic components. The presence of magnetic Ho3+ ions in the SmFeO3 sample causes the magnetic exchange interaction between the 2p orbital of Fe3+ and the 4d sub-shell of Ho3+ ions. The dependence of pH value on the removal efficiency of Pb2+ from water was studied. The maximum Pb2+ removal efficiency of the Ho-doped SmFeO3 nano perovskite is 26% at pH = 5 and 99% at pH = 8. The Freundlich, Langmuir and Temkin isotherms were studied to understand the adsorption mechanism. The Temkin adsorption isotherm best fitted with the experimental data.

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Section: Homentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation, characterization and magnetic properties of Sm0.95Ho0.05FeO3 nanoparticles and their application in the purification of water

Arman

2022

Appl. Phys. A

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“…A so-called cluster-glass state (a spin-glass behavior associated to a magnetostatic excitation through a spin-phonon or spin-lattice interaction) is also reported in the temperature region between 100 K and 200 K, where the net magnetization reaches its saturation [10]. Because of its high T SR and its rich phase diagram, SFO has attracted particular attention for exploitation in technological devices and for property engineering ranging from magnetization and ferroelectricity enhancement by strain or oxygen vacancies [11,12] to nanostructure fabrication [13,14] and Sm-site doping [15,16]. Interestingly, SFO has been also investigated for gas sensing [17,18], with a recent proposal of an application for noninvasive colorectal cancer screening [19].…”

Section: Introductionmentioning

confidence: 96%

Unraveling the role of Sm 4f electrons in the magnetism of SmFeO3

2023

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Magnetic rare-earth orthoferrites RFeO 3 host a variety of functional properties from multiferroicity and strong magnetostriction to spin-reorientation transitions and ultrafast light-driven manipulation of magnetism, which can be exploited in spintronics and next-generation devices. Among these systems, SmFeO 3 is attracting particular interest for its rich phase diagram and the high temperature Fe-spin magnetic transitions, which combines with a very low temperature and as yet unclear Sm-spin ordering. Various experiments suggest that the interaction between the Sm and Fe magnetic moments (further supported by the magnetic anisotropy), is at the origin of the complex cascade of transitions, but a conclusive and clear picture has not yet been reached. In this paper, by means of comprehensive first-principles calculations, we unravel the role of the magnetic Sm ions in the Fe-spin reorientation transition and in the detected anomalies in the lattice vibrational spectrum, which are a signature of a relevant spin-phonon coupling. By including both Smf electrons and noncollinear magnetism, we find frustrated and anisotropic Sm interactions, and a large magnetocrystalline anisotropy mediated by the SOC of the Sm-4 f electrons, which drive the complex magnetic properties and phase diagram of SmFeO 3 .

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