Microstructure and magnetic properties of FePt-Cr2O3 films

Taisuke Shiroyama; Bollapragada S.D.C.S. Varaprasad; Yukiko K. Takahashi; Kazuhiro Hono

doi:10.1109/TMAG.2014.2321615

Microstructure and magnetic properties of FePt-Cr₂O₃ films

Taisuke Shiroyama^*, Bollapragada S.D.C.S. Varaprasad, Yukiko K. Takahashi, Kazuhiro Hono

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

We have studied the microstructures and magnetic properties of FePt with various metal oxides, to achieve an ideal media structure on glass substrates for thermally assisted magnetic recording. Unlike FePt-C granular films, FePt-M_xO_y(M = Ti, Nb, W, Zr, and Al) granular films showed an interconnected in-plane microstructure and low coercivity. However, the usage of Cr₂O₃ as a segregant leads to very fine columnar granular structure, while there is still room for improvement in coercivity.

Original language	English
Article number	6971612
Journal	IEEE Transactions on Magnetics
Volume	50
Issue number	11
DOIs	https://doi.org/10.1109/TMAG.2014.2321615
Publication status	Published - 2014 Nov 1
Externally published	Yes

Keywords

FePt
granular film
heat-assisted magnetic recording (HAMR)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/TMAG.2014.2321615

Cite this

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abstract = "We have studied the microstructures and magnetic properties of FePt with various metal oxides, to achieve an ideal media structure on glass substrates for thermally assisted magnetic recording. Unlike FePt-C granular films, FePt-MxOy(M = Ti, Nb, W, Zr, and Al) granular films showed an interconnected in-plane microstructure and low coercivity. However, the usage of Cr2O3 as a segregant leads to very fine columnar granular structure, while there is still room for improvement in coercivity.",

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AU - Takahashi, Yukiko K.

AU - Hono, Kazuhiro

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AB - We have studied the microstructures and magnetic properties of FePt with various metal oxides, to achieve an ideal media structure on glass substrates for thermally assisted magnetic recording. Unlike FePt-C granular films, FePt-MxOy(M = Ti, Nb, W, Zr, and Al) granular films showed an interconnected in-plane microstructure and low coercivity. However, the usage of Cr2O3 as a segregant leads to very fine columnar granular structure, while there is still room for improvement in coercivity.

KW - FePt

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KW - heat-assisted magnetic recording (HAMR)

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