Room-temperature ferromagnetism and oxygen pressure-dependent optical, ferromagnetic properties in SrSn0.5Co0.5O3 thin films

Room-temperature ferromagnetism was obtained in SrSn0.5Co0.5O3 (SSCO) epitaxial film on SrTiO3 substrate by pulsed laser deposition, and the effects of oxygen pressure (PO2) on the microstructure, optical and magnetic properties were examined. An interesting hybrid epitaxial film embedded with polyc...

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Bibliographic Details
Published inMaterials research letters Vol. 6; no. 5; pp. 276 - 282
Main Authors Xuemei Hu, Xiangdong Gao, Dongsheng Gao, Xiaomin Li
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 04.05.2018
Subjects
Alkaline stannate
optical band gap
room-temperature ferromagnetism
thin films
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Summary:Room-temperature ferromagnetism was obtained in SrSn0.5Co0.5O3 (SSCO) epitaxial film on SrTiO3 substrate by pulsed laser deposition, and the effects of oxygen pressure (PO2) on the microstructure, optical and magnetic properties were examined. An interesting hybrid epitaxial film embedded with polycrystalline SSCO and SrCoOx nanoparticles was observed. The increase of PO2 relaxed the film/substrate compressive strain, promoted the growth of crystallites and reduced the optical band gap (from 2.43 to 1.68 eV). The SSCO film deposited at 0.1 Pa exhibited good ferromagnetism at 100–300 K, while the ferromagnetism in the film with higher and lower oxygen pressure (1 Pa and 10−4 Pa) was weak.
ISSN:2166-3831
DOI:10.1080/21663831.2018.1446055