Nanogranular Co-Fe-Al-O sputtered thin films for magnetoelastic device applications in the GHz frequency range

J. C. Sohn, D. J. Byun, S. H. Lim

    Research output: Contribution to journalConference articlepeer-review

    31 Citations (Scopus)

    Abstract

    Co-Fe-Al-O nanogranular thin films for magnetoelastic device applications in the GHz frequency range are fabricated by RF-magnetron sputtering under an Ar+O2 atmosphere. A very large resistivity up to 400μΩcm, a saturation magnetization (4πMS) of 16kG and an anisotropy field of 45Oe are consistently obtained, resulting in excellent high-frequency magnetic properties, such as a high ferromagnetic resonance frequency of 2.3GHz combined with a large real part of permeability of 315. A saturation magnetostriction of 45ppm is achieved at a magnetic field as low as 20Oe.

    Original languageEnglish
    Pages (from-to)1500-1502
    Number of pages3
    JournalJournal of Magnetism and Magnetic Materials
    Volume272-276
    DOIs
    Publication statusPublished - 2004 May
    EventProceedings of the International Conference on Magnetism - Rome, Italy
    Duration: 2003 Jul 272003 Aug 1

    Bibliographical note

    Funding Information:
    Financial support from the KIST Vision 21 program and the Research Center of Advanced Magnetic Materials at CNU is gratefully acknowledged.

    Copyright:
    Copyright 2008 Elsevier B.V., All rights reserved.

    Keywords

    • Co-Fe-Al-O nanogranular film
    • Ferromagnetic resonance frequency
    • Magnetoelastic device
    • Magnetostriction

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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