Anisotropy induced switching field distribution in high-density patterned media

Talapatra, A and Mohanty, Jyoti Ranjan (2017) Anisotropy induced switching field distribution in high-density patterned media. SPIN, 7 (2). p. 1750005. ISSN 2010-3247

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We present here micromagnetic study of variation of switching field distribution (SFD) in a high-density patterned media as a function of magnetic anisotropy of the system. We consider the manifold effect of magnetic anisotropy in terms of its magnitude, tilt in anisotropy axis and random arrangements of magnetic islands with random anisotropy values. Our calculation shows that reduction in anisotropy causes linear decrease in coercivity because the anisotropy energy tries to align the spins along a preferred crystallographic direction. Tilt in anisotropy axis results in decrease in squareness of the hysteresis loop and hence facilitates switching. Finally, the experimental challenges like lithographic distribution of magnetic islands, their orientation, creation of defects, etc. demanded the distribution of anisotropy to be random along with random repetitions. We have explained that the range of anisotropy values and the number of bits with different anisotropy play a key role over SFD, whereas the position of the bits and their repetitions do not show a considerable contribution.

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IITH Creators:
IITH CreatorsORCiD
Mohanty, Jyoti RanjanUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Switching field, distribution bit-patterned, media magnetic, anisotropy, micromagnetic simulation
Subjects: Physics
Divisions: Department of Physics
Depositing User: Library Staff
Date Deposited: 15 Jan 2019 04:58
Last Modified: 15 Jan 2019 04:58
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