Magnetocaloric effect at room temperature in powder of La0.5(CaSr)0.5MnO3

Bejar, M.; Dhahri, R.; Halouani, Foued; Dhahri, E.

doi:10.1016/j.jallcom.2005.07.019

Cited by 58 publications

(31 citation statements)

References 23 publications

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“…4(b)), which is very close to the sharp ferrimagnetic transition temperature (T N ¼ 300 K). [14], and is even comparable to that of some rare-earth-based alloys like Gd 4 Bi 3 ($ 2.7 J/kg K, ΔH ¼ 5 T, T c ¼ 332 K) [1]. It is worth noting that the values of -ΔS M for ΔH ¼ 1 T are positive at all the measured temperatures corresponding to the conventional MCE.…”

Section: Resultssupporting

confidence: 55%

“…Among all the currently available magnetocaloric materials, room-temperature magnetic refrigeration is of particular interest because of its energy saving and environmental concerns [1,13,14]. In general, the room-temperature magnetocaloric materials contain the expensive rare-earth metal such as Gd, etc, which is a negative factor for practical application.…”

Section: Introductionmentioning

confidence: 99%

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Large reversible room-temperature magnetocaloric effect in the Ba0.5Sr1.5Zn2Fe12O22-related hexaferrites

Zhang

Yin

Dai

et al. 2015

Ceramics International

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Section: Resultssupporting

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Large reversible room-temperature magnetocaloric effect in the Ba0.5Sr1.5Zn2Fe12O22-related hexaferrites

Zhang

Yin

Dai

et al. 2015

Ceramics International

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“…Also, as can be seen, the effective magnetic moment value, determined at room temperature (μ exp eff = 13.48 µ B ), is very close to the theoretical effective paramagnetic value (μ exp eff = 13.54 µ B ). On the other hand, in the past few years, measurements on powder samples in high magnetic fields turned out a practical tool for studying the magnetic susceptibility, in many binary and ternary compounds formed from 3d transition elements (M) and rare-earth elements (Ln) [33][34][35][36][37]. For this reason, it can be seen that for Er 2 Ti 2 O 7 compound, the isotherms measurements between 50 and 100 K (Fig.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Magnetic Properties, Magnetic Entropy and Arrot Plot of Antiferromagnetic Frustrated Er2Ti2O7 Compound

Amor

Bejar

Hussein

et al. 2011

J Supercond Nov Magn

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The pyrochlore Er 3+ 2 Ti 4+ 2 O 2− 7 was synthesized via a ceramic method using two different oxides (Er 2 O 3 and TiO 2 ). The compound was found to crystallize in the cubic system with the Fd3m space group (No. 227). A magnetic study, carried out at 2 and 300 K under an applied magnetic field μ 0 H = 0.05 T, has revealed a complex magnetic structure at low temperature. The effective paramagnetic moment μ exp eff , deduced from (χ − χ 0 ) −1 = f (T ) curve, was found by assuming a zero moment on the transition metal atom Ti 4+ . The paramagnetic Curie-Weiss temperature θ CW = −21.54 K, the nearest neighbor interaction J nn = −2.30 K, the classical nearest neighbor J cl = −8.65 K and the dipolar D nn = 3.76 K interactions' values have revealed an antiferromagnetic behavior for Er 2 Ti 2 O 7 compound at low temperature. We have also studied the effects of the magnetic field splitting of rare-earth atom Er 3+ in the compound Er 2 Ti 2 O 7 curved Arrott plots.

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“…Intermetallic compounds that contain rare-earth elements are particularly interesting because of their temperature-and pressure-dependent structural and physical transitions that make them potential candidates for magnetic applications [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Al Substitution on Structural, Magnetic, and Magnetocaloric Properties of Er6Fe23−xAlx (x = 0 and 3) Intermetallic Compounds

et al. 2017

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Abstract:The structural, magnetic, and magnetocaloric properties of Er 6 Fe 23−x Al x (x = 0 and 3) intermetallic compounds have been studied systematically. Samples were prepared using the arc furnace by annealing at 1073 K for one week. Rietveld analysis of XRD shows the formation of pure crystalline phase with cubic Fm-3m structure. Refinement results show that the unit cell volume decreases with increasing Al content. The Curie temperature Tc of the prepared samples was found to be strongly dependent on the aluminum content. This reduces magnetization and the ferrimagnetic phase transition temperature (Tc) from 481 K (for x = 0) to 380 K (for x = 3), is due to the substitution of magnetic element (Fe) by non-magnetic atoms (Al). With the increase of the Al content, a decrease in the values of magnetic entropy is observed. The magnitude of the isothermal magnetic entropy (|∆SM|) at the Tc decreases from 1.8 J/kg·K for x = 0 to 0.58 J/kg·K for x = 3 for a field change 14 kOe. Respectively, the relative cooling power (RCP) decreases with increasing Al content reaching 42 Jkg −1 for x = 0 to 28 Jkg −1 for x = 3.

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Magnetocaloric effect at room temperature in powder of La0.5(CaSr)0.5MnO3

Cited by 58 publications

References 23 publications

Large reversible room-temperature magnetocaloric effect in the Ba0.5Sr1.5Zn2Fe12O22-related hexaferrites

Large reversible room-temperature magnetocaloric effect in the Ba0.5Sr1.5Zn2Fe12O22-related hexaferrites

Synthesis, Magnetic Properties, Magnetic Entropy and Arrot Plot of Antiferromagnetic Frustrated Er2Ti2O7 Compound

Effect of Al Substitution on Structural, Magnetic, and Magnetocaloric Properties of Er6Fe23−xAlx (x = 0 and 3) Intermetallic Compounds

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