Improvement of electrical and magnetic properties in La0.67Ca0.33Mn0.97Co0.03O3 ceramic by Ag doping

Li, Junfeng; Wang, Haishan; Liang, Zhaowei; Li, Yingjuan; Chen, Qingming; Zhou, Hui; Li, Yule

doi:10.1016/j.ceramint.2022.08.255

Cited by 5 publications

(2 citation statements)

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“…Prior studies revealed a behavior similar to the one inspected here. 1,2,24) Particularly, for x = 0 and 0.08, the CW law downturn deviation was observed ranging from T C to the Griffiths temperature T G , which was acquired from the maximum of the first order deviation with respect to temperature of » ¹1 (T) curve (displayed in the inset of Fig. 4(b)).…”

Section: Resultsmentioning

confidence: 89%

“…Perovskite-type manganites with the formula R 1¹x A x MnO 3 (R = rare-earth element, such as La, Pr, Nd, + ; and A = alkaline-earth element, such as Ca, Ba, Sr, +) owing unique magnetic and electrical properties are promising candidates for technology applications of magnetic refrigerators (MRs), and magnetic switches. 1) MRs are based on the principle of the magnetocaloric (MC) effect; an effect which refers to the intrinsic property of all magnetic materials. MRs has been the subject of intense research due to its efficient cooling performance than a conventional vapor compression-based refrigerating system in addition to its environment friendly aspect.…”

Section: Introductionmentioning

confidence: 99%

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Large Magnetocaloric Effect in Cu-Doped La0.7Ca0.3MnO3 Compounds

Ho¹,

Phan²,

Putri

et al. 2023

Mater. Trans.

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The structural characterization, and the electronic, magnetic and magnetocaloric properties of polycrystalline samples of La 0.7 Ca 0.3 Mn 1¹x Cu x O 3 (x = 0, 0.04, 0.06, 0.08) have been investigated. X-ray powder diffraction analysis indicates all samples having an orthorhombic structure, belonging to the Pbnm space group. X-ray absorption fine structure spectra reveal that Mn is in the mixed state of Mn 3+ and Mn 4+ while Cu has divalent state (Cu 2+ ). With the substitution of Cu 2+ for Mn, the Curie temperature, T C , decreases monotonically from 248 K for x = 0 to 156 K for x = 0.08, which is due to weakened exchange interactions. The downturn in the temperature dependencies of the inverse magnetic susceptibility, » ¹1 (T ), curves observed above T C for x = 0 and 0.08 is characteristic of the Griffiths-like phase. The analysis of isothermal magnetization data M(T, H ) based on the Banerjee's criteria has indicated x = 0, 0.04, and 0.06 samples undergoing a first-order magnetic phase transition. However, the x = 0.08 sample, the coexistences of second-order magnetic phase transition at low magnetic fields below 8 kOe and first-order magnetic phase transition at high magnetic fields were observed. The maximum magnetic entropy change measured at a magnetic field span of 50 kOe occurring near the T C decreases from 10.3 to 4.8 J/kg.K with increasing x from 0 to 0.08. However, the relative cooling power (RCP) tends to increase, in which a maximum RCP of 360 J/kg for x = 0.08 that is about 1.3 times greater than that observed for the parent sample (x = 0).

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Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%