Magnetocaloric effect in (La1−Sm )0.67Pb0.33MnO3 (0 ≤ x ≤ 0.3) manganites near room temperature

Çetin, Selda Kılıç; Acet, Mehmet; Güneş, Mustafa; Ekicibil, Ahmet; Farle, Michael

doi:10.1016/j.jallcom.2015.07.217

Cited by 44 publications

(3 citation statements)

References 45 publications

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“…An international e-journal published by the University of Usak Journal homepage: dergipark.gov.tr/uujes research and development efforts. Recent studies have revealed that manganite compounds in ABO3 perovskite structure [4][5][6][7], which exhibit magnetocaloric properties, may be promising candidates to replace Gd-based alloys [8][9][10] due to their unique magnetic and structural properties. These compounds exhibit versatile applications across various technological domains, including magnetic refrigeration, solid-state cooling devices, and magnetic sensors [11,12].…”

Section: Journal Of Engineering Sciencesmentioning

confidence: 99%

EXPLORING THE INFLUENCE OF B-SITE DOPANTS ON STRUCTURAL AND MAGNETIC PROPERIES IN La0.8Ag0.2Mn1-XCoxO3 (x: 0 and 0.1) COMPOUNDS

Altan,

Ak,

Coşkun

2024

Usak University Journal of Engineering Sciences

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This study examines the structural, electrical, magnetic, and magnetocaloric properties of La0.8Ag0.2Mn0.9A0.1O3 (A: Mn, and Co) compounds under doping in the B-site. XRD results show that the compound containing Co ions directly replaced Mn ions in the B-site without forming a secondary phase containing higher metallic Ag impurities. The data obtained using Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS), the temperature dependence of magnetization (M-T), the magnetic field dependence of magnetization (M-H), and the magnetic entropy change (SM) analysis reveal the effect of the doped element on the magnetic properties of the compounds due to the changes they create in the structural and Mn3+/Mn4+ ratio. It has been determined that the paramagnetic to ferromagnetic transition temperature (Curie temperature, TC) of the La0.8Ag0.2Mn0.9Co0.1O3 (LAMO-Co) is quite lower than the LAMO.

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Section: Journal Of Engineering Sciencesmentioning

confidence: 99%

EXPLORING THE INFLUENCE OF B-SITE DOPANTS ON STRUCTURAL AND MAGNETIC PROPERIES IN La0.8Ag0.2Mn1-XCoxO3 (x: 0 and 0.1) COMPOUNDS

Altan,

Ak,

Coşkun

2024

Usak University Journal of Engineering Sciences

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“…[46][47][48][49][50][51][52] The non-superimposition of ZFC/FC curves is usually attributed to (a) coexistence of ferromagnetic and antiferromagnetic phases caused by magnetic frustration, (b) dominating effect of magnetic anisotropy and (c) spin glass behaviour. [53][54][55][56] In our samples, we believe that the divergence of ZFC and FC curves is most likely to be due to the spin glass behaviour. Further, the nonoverlapping of ZFC/FC data in both the samples suggest that there is no true long range magnetic order.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Magnetic ion oxidation state dependent magnetoelectric coupling strength in Fe doped BCT ceramics

et al. 2020

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“…Among these manganites, La1-xAxMnO3 compounds have been studied extensively 62 . The host compound, LaMnO3, where Mn ions with +3 valence, is an antiferromagnetic insulator, characterized by super exchange coupling between Mn 3+ sites 63 . The introduction of a divalent or monovalent ion instead of La into perovskite results in mixed valence states of Mn 3+ and Mn 4+ .…”

Section: Manganitesmentioning

confidence: 99%

Study of iron based magnetocaloric nanomaterials

Chaudhary¹

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Magnetic materials experience a change in temperature when they are adiabatically magnetized and demagnetized, this phenomena is known as the magnetocaloric effect (MCE). The MCE can be employed in environmentally friendly, green and novel energy efficient cooling systems as this technique does not have hydrofluorocarbons or ozone depleting gases, unlike conventional gas compression cooling systems. The giant MCE in rare earth based materials has motivated magnetocaloric research in the last two decades. However, the systems studied so far, i.e., gadolinium based materials are very expensive, corrode easily and have limited availability. Developing a new, affordable, readily available and corrosion resistant material is desired for commercial use. Low relative cooling power (RCP) is often another challenge in developing a magnetic cooling system.Nanoparticles can increase the working temperature span, therefore we developed transition metal based magnetocaloric nanoparticles which are environmentally friendly, affordable and possess RCP higher than those of gadolinium nanoparticles.The MCE of (Fe70Ni30)100-xAx nanocrystalline powders with A = B, Mn and Cr produced by high energy ball milling has been investigated. Binary Fe70Ni30 nanoparticles show high magnetization and low coercivity but they are not useful for room temperature cooling applications because of their high Curie temperature (TC ~ 443 K). Boron, manganese and chromium, were individually used to tune the TC closer to room temperature.(Fe70Ni30)89B11 nanoparticles were found to exhibit very high RCP up to 640 J-kg -1 for a field change ΔH of 5 T with TC ~ 381 K. Broad operating temperature range along with moderate change in entropy and very high RCP make these nanoparticles potential candidates for magnetic cooling applications in low grade waste heat recovery. Critical analysis of the magnetic phase transition using the modified Arrott plot, Kouvel-Fisher method and critical isotherm plots yields critical exponents of β = 0.364, γ = 1.319, δ = 4.623 and α = -0.055, which are close to the theoretical exponents obtained from the 3D-Heisenberg model.

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Magnetocaloric effect in (La1−Sm )0.67Pb0.33MnO3 (0 ≤ x ≤ 0.3) manganites near room temperature

Cited by 44 publications

References 45 publications

EXPLORING THE INFLUENCE OF B-SITE DOPANTS ON STRUCTURAL AND MAGNETIC PROPERIES IN La0.8Ag0.2Mn1-XCoxO3 (x: 0 and 0.1) COMPOUNDS

EXPLORING THE INFLUENCE OF B-SITE DOPANTS ON STRUCTURAL AND MAGNETIC PROPERIES IN La0.8Ag0.2Mn1-XCoxO3 (x: 0 and 0.1) COMPOUNDS

Magnetic ion oxidation state dependent magnetoelectric coupling strength in Fe doped BCT ceramics

Study of iron based magnetocaloric nanomaterials

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