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Tunable Magnetic Properties by Interfacial Manipulation of L10-FePt Perpendicular Ultrathin Film with Island-Like Structures

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Abstract:

Based on interfacial manipulation of the MgO single crystal substrate and non-magnetic AlN compound, a L10-FePt perpendicular ultrathin film with the structure of MgO/FePt-AlN/Ta was designed, prepared, and investigated. The film is comprised of L10-FePt "magnetic islands," which exhibits a perpendicular magnetic anisotropy (PMA), tunable coercivity (H C), and interparticle exchange coupling (IEC). The MgO substrate promotes PMA of the film because of interfacial control of the FePt lattice orientation. The AlN compound is doped to increase the difference of surface energy between FePt layer and MgO substrate and to suppress the growth of FePt grains, which takes control of island growth mode of FePt atoms. The AlN compound also acts as isolator of L10-FePt islands to pin the sites of FePt domains, resulting in the tunability of H C and IEC of the films.

Keywords: INTERFACIAL MANIPULATION; ISLAND-LIKE STRUCTURE; MAGNETIC RECORDING MEDIA

Document Type: Research Article

DOI: https://doi.org/10.1166/jnn.2012.4276

Publication date: 2012-02-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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