Structural, magnetic and magnetocaloric investigation of La0.7−xEuxBa0.3MnO3 manganites

We studied the effect of Eu 3+ substitution on the structural, magnetic and magnetocaloric properties of La 0.7– x Eu x Ba 0.3 MnO 3 ( x  = 0, 0.02, 0.04, 0.06 and 0.08) (LEBMO). The material is prepared by solid-state sintering method. X-ray diffraction and structural refinement parameters indicate...

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Veröffentlicht in:Bulletin of materials science 2023-03, Vol.46 (2), p.59, Article 59
Hauptverfasser: Pan, Binlong, Luo, Xinyao, Fang, Jieyang, Wu, Qiong, Yu, Nengjun, Yu, Yundan, Pan, Minxiang, yang, Hangfu, Ge, Hongliang
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Sprache:eng
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Zusammenfassung:We studied the effect of Eu 3+ substitution on the structural, magnetic and magnetocaloric properties of La 0.7– x Eu x Ba 0.3 MnO 3 ( x  = 0, 0.02, 0.04, 0.06 and 0.08) (LEBMO). The material is prepared by solid-state sintering method. X-ray diffraction and structural refinement parameters indicate that all the synthesized samples have single-phase hexagonal structure. Magnetic measurements indicate that Curie temperature ( T C ) of the samples decrease with increasing Eu 3+ content, because of the weakening of double exchange interaction. All samples present a second-order ferromagnetic to paramagnetic phase transition. Magnetic entropy change (Δ S M ) of the samples increases as the Eu 3+ content enhance. When x  = 0.08, the T C of the sample is 258.6 K and the maximum value of Δ S M reaches 3.27 J kg −1  K −1 at 5 T of a magnetic field. These results indicate that the material can be used as an ideal working material for the normal temperature magnetic refrigeration.
ISSN:0973-7669
0250-4707
0973-7669
DOI:10.1007/s12034-022-02882-3