MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Microstructures of Ta-Inserted SmCo5/Fe Nanocomposite Thick Film Magnets
Masaru ItakuraShin-ichi MurayamaMasatoshi MitsuharaMinoru NishidaHiroaki KogaMasaki NakanoHirotoshi Fukunaga
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2017 Volume 58 Issue 10 Pages 1351-1355

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Abstract

Ta-inserted SmCo5/Fe nanocomposite thick film magnets were synthesized by high-speed pulsed laser deposition followed by pulse annealing. The microstructures of the film magnets were characterized by high-resolution scanning electron microscopy and scanning transmission electron microscopy. The as-deposited thick film possessed a multilayered Sm-Co/Ta/α-Fe/Ta structure with amorphous Sm-Co layers and [110]-oriented crystalline α-Fe layers. After pulse annealing, many fine grains of Laves phase TaCo2 were formed, and then the multilayered structure was converted to a granular nanocomposite thick film magnet composed of fine crystalline grains of Sm(Co, Fe)5, α-(Fe, Co), and TaCo2. The volume fractions and grain sizes of hard magnetic Sm(Co, Fe)5, soft magnetic α-(Fe, Co), and TaCo2 were controlled by the thicknesses of the Ta layer, producing a nanocomposite thick film magnet with good exchange coupling.

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© 2017 The Japan Institute of Metals and Materials
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