Room-temperature ferromagnetism and hydrogen shallow donors in rare-earth Eu-doped ZnO nanorods

Dong Min Choi, Yeon Ho Lee, Kyu Won Lee, Won Koo Park, Cheol Eui Lee

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    6 Citations (Scopus)

    Abstract

    Prominent room-temperature ferromagnetism in rare-earth Eu-doped ZnO nanorods has been investigated by means of magnetization and electron paramagnetic resonance (EPR) measurements. The magnetism of the unhydrogenated Eu-doped ZnO nanorods is explained by a spin-1/2 species, attributed to the Zn vacancies. In the hydrogenated Eu-doped ZnO nanorods, a spin-1 species, attributed to the Zn vacancies coupled to the hydrogen shallow donors, would give rise to a slightly enhanced magnetization. The hydrogen shallow donors, identified by the electron paramagnetic resonance (EPR) measurements, can be taken to be responsible for the changes in the spin states and magnetization of the Eu-doped ZnO nanorods.

    Original languageEnglish
    Article number412117
    JournalPhysica B: Condensed Matter
    Volume585
    DOIs
    Publication statusPublished - 2020 May 15

    Bibliographical note

    Funding Information:
    This work was supported by the Ministry of Education and the National Research Foundation of Korea (Project No. 2019S1A5A2A03050121). The Korea Basic Science Institute (KBSI) is acknowledged for the measurements.

    Funding Information:
    This work was supported by the Ministry of Education and the National Research Foundation of Korea (Project No. 2019S1A5A2A03050121 ). The Korea Basic Science Institute (KBSI) is acknowledged for the measurements.

    Publisher Copyright:
    © 2020 Elsevier B.V.

    Keywords

    • Electron paramagnetic resonance
    • Hydrogen shallow donors
    • Rare-earth Eu-Doped ZnO
    • Room-temperature ferromagnetism

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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