TY - JOUR
T1 - MAMR writability and signal-recording characteristics on granular exchange-coupled composite media
AU - Tanaka, T.
AU - Kurihara, K.
AU - Ya, X.
AU - Kanai, Y.
AU - Bai, X.
AU - Matsuyama, K.
N1 - Funding Information:
This research was partially supported by the Advanced Storage Research Consortium (ASRC). The authors would like to thank Data Storage Systems Center (DSSC) in Carnegie Mellon University for the knowledge sharing.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/7/1
Y1 - 2021/7/1
N2 - Exchange-coupled composite (ECC) media present a possible layered structure for microwave-assisted magnetic recording (MAMR) systems. In this paper, MAMR writability and read/write characteristics were computed using a micromagnetic simulation, which assumed ECC media with graded and notched anisotropy structures. Writability was estimated from the switchable maximum averaged anisotropy field for footprint images. The calculation indicated 40–50% enhanced writability by microwave assistance for both graded and notched anisotropy structure media with suitable magnetic parameters. A read/write simulation indicated that notched-structure media with strongly coupled magnetic layers tended to be advantageous for signal-to-noise ratio and indicated well-confined recorded bits with a narrow magnetic write width.
AB - Exchange-coupled composite (ECC) media present a possible layered structure for microwave-assisted magnetic recording (MAMR) systems. In this paper, MAMR writability and read/write characteristics were computed using a micromagnetic simulation, which assumed ECC media with graded and notched anisotropy structures. Writability was estimated from the switchable maximum averaged anisotropy field for footprint images. The calculation indicated 40–50% enhanced writability by microwave assistance for both graded and notched anisotropy structure media with suitable magnetic parameters. A read/write simulation indicated that notched-structure media with strongly coupled magnetic layers tended to be advantageous for signal-to-noise ratio and indicated well-confined recorded bits with a narrow magnetic write width.
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U2 - 10.1016/j.jmmm.2021.167884
DO - 10.1016/j.jmmm.2021.167884
M3 - Article
AN - SCOPUS:85102966003
SN - 0304-8853
VL - 529
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 167884
ER -