Magnetic and critical behavior studies of perovskite manganites La0.8-xEuxSr0.2MnO3(x = 0 and 0.05)

Xiang, Jin; Li, Cheng; Chen, Hongwei; Cao, Fengze; Liu, Yi; Wang, Wenxing; Zheng, Lin; Zhao, Jianjun

doi:10.1007/s10854-021-05557-7

Cited by 8 publications

(1 citation statement)

References 34 publications

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“…where Mi+1 and Mi denote the values of magnetization intensity corresponding to Ti+1 and Ti temperatures, respectively, and ∆Hi denotes the difference between the adjacent applied magnetic fields [27,28] . The curve of the magnetic entropy change of the sample with temperature is shown in Fig.…”

Section: Results and Analysismentioning

confidence: 99%

Magnetothermal Effects and Critical Behavior of Rare Earth Manganese Oxides La 0.65 Ca 0.35 Mn 1-x Ni x O 3 (x=0, 0.2)

Zhao

Xiang

et al. 2022

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This study used the conventional solid-phase reaction method to prepare polycrystalline samples: La0.65Ca0.35Mn1−xNixO3 (x = 0, x = 0.2). The effects of Ni doping on the preformed cluster phases, magnetothermal effects, and critical behavior were systematically investigated. The results showed that the prepared polycrystalline samples all had cubic chalcogenide structures. The substitution of Ni2+ ions for a certain number of Mn3+ ions reduced the changes in the lattice parameters, unit cell volume, Curie temperature (Tc), magnetic entropy, and magneto-entropy. The changes in these properties originated from the partial substitution of Ni2+ for Mn3+ ions, which changed the Mn3+/Mn4+ ratio and decreased the Mn-O-Mn bond angle, thus weakening the double exchange interaction. Both samples had a preformed cluster phase above the low-temperature magnetic-transition temperature. The critical behaviors of both samples fit the tricritical model well. A transition from primary to secondary phase transition existed for both the parent and doped samples, and the maximum magnetic entropy changes of the samples at an applied magnetic field of 7 T were 7.70 J·kg− 1·K− 1 and 2.08 J·kg− 1·K− 1, respectively.

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Section: Results and Analysismentioning

confidence: 99%