Magnetic Properties and Columnar Structure for CoPt Alloy Granular Media With Grain Boundary Oxides of Various Melting Points

Magnetic Properties and Columnar Structure for CoPt Alloy Granular Media With Grain Boundary Oxides of Various Melting Points

Investigation of the effect of the melting point (Tm) of various single oxides on the columnar growth and generation of the nucleation site for CoPt granular media deposited at room temperature were conducted. When oxide with T m from 1857 °C to 2410 °C is added to the granular media, thickness of t...

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Veröffentlicht in:IEEE transactions on magnetics 2017-11, Vol.53 (11), p.1-4
Hauptverfasser: Kushibiki, Ryosuke, Kim Kong Tham, Hinata, Shintaro, Saito, Shin
Format: Artikel
Sprache:eng
Schlagworte:
Cobalt base alloys
Cobalt compounds
Columnar structure
CoPt oxide granular media
Grain
Grain boundaries
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Intermetallic compounds
Magnetic properties
Magnetic resonance imaging
Magnetic separation
Magnetism
Media
Melting points
oxide melting point
Perpendicular magnetic anisotropy
Platinum compounds
small magnetic grain size
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Zusammenfassung:Investigation of the effect of the melting point (Tm) of various single oxides on the columnar growth and generation of the nucleation site for CoPt granular media deposited at room temperature were conducted. When oxide with T m from 1857 °C to 2410 °C is added to the granular media, thickness of the heteroepitaxial growth of the magnetic grains on the Ru underlayer (columnar structure) decreases from 13 to 5.5 nm. The employment of oxide with T m of the range from 450 °C to 2410 °C to the granular media will lead to the reduction of grain size from 5.6 to 3.0 nm, due to the suppression of the lateral grain growth by the high T m oxide.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2017.2706959