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Structural transition induced enhancement of magnetization and magnetoresistance in epitaxial (Pr0.5Ba0.5MnO3)1−x:(CeO2)x vertically aligned thin films

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Abstract

Epitaxial (Pr0.5Ba0.5MnO3)1−x:(CeO2)x (PBMO:CeO2, x = 0, 10%, 20%, 35%, and 50% stands for the molar ratio of the CeO2 secondary phase) vertically aligned nanocomposite (VAN) thin films were successfully fabricated on single crystalline (001) (La,Sr)(Al,Ta)O3 substrates by pulsed laser deposition. With increasing x, a structural transition induced by the vertical strain from the CeO2 secondary phase was observed at 20% ≤ x ≤ 35% by reciprocal space mapping. What's more, it is not only the enhancement of magnetoresistance that was observed but also the increasing magnetization. The maximum magnetization and magnetoresistance were achieved at x = 35%, which are almost 4.7 times (at 20 K) and 1.6 times (at 110 K) as high as those at x = 0%, respectively. Such great enhancement of magnetization can be attributed to the vertical strain induced structural transition. Our research indicates that the structural transition induced by the introduction of secondary phase CeO2 plays an important role in improving the magnetic and transport properties of VAN thin films.

Graphical abstract: Structural transition induced enhancement of magnetization and magnetoresistance in epitaxial (Pr0.5Ba0.5MnO3)1−x:(CeO2)x vertically aligned thin films

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Publication details

The article was received on 12 Mar 2018, accepted on 18 Jul 2018 and first published on 18 Jul 2018


Article type: Paper
DOI: 10.1039/C8CE00389K
Citation: CrystEngComm, 2018, Advance Article
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    Structural transition induced enhancement of magnetization and magnetoresistance in epitaxial (Pr0.5Ba0.5MnO3)1−x:(CeO2)x vertically aligned thin films

    S. Cheng, L. Shen, C. Ma, S. Cheng, Y. Dai, S. Mi, M. Liu and C. Jia, CrystEngComm, 2018, Advance Article , DOI: 10.1039/C8CE00389K

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