Calculations of magnetization configurations of SPT head using micromagnetic model

Yoshida, Kazuo; Suzuki, A.; Yanagihara, Hideto

doi:10.1016/j.jmmm.2004.10.012

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Cited by 11 publications

(1 citation statement)

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“…Magnetic properties of heads in a hard disk drive (HDD) have been observed by optical methods using Kerr [15,16], electron microscopes [17], magnetic force microscopy (MFM) [18], and so on [19]. Meanwhile, strain imaging observes the phenomena that magnetic fields provided by the write head itself deform magnetic poles and other parts.…”

Section: Introductionmentioning

confidence: 99%

Strain imaging of a perpendicular recording head in a Hard Disk Drive

Takata¹,

Kurata²,

Tamura³

et al. 2010

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Strain imaging of a perpendicular recording head in a Hard Disk Drive

Takata¹,

Kurata²,

Tamura³

et al. 2010

Journal of Magnetism and Magnetic Materials

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Micromagnetic simulation by using the fast multipole method specialized for uniform brick elements

Takahashi

Wakao

Iwashita

et al. 2009

Journal of Applied Physics

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This paper describes a large-scale micromagnetic simulation by using the fast multipole method (FMM) specialized for uniform brick elements. The fast Fourier transform (FFT) is widely used to reduce computational costs of the demagnetizing field calculation. However, the FFT still requires operation counts of O(N log N), where N is the number of elements, which results in the huge computational costs in large-scale problems. To overcome the difficulties, we develop an O(N) approach based on the FMM. In a micromagnetic simulation, an analyzed region is usually subdivided into uniform elements. By making the best use of the periodic structure of uniformly distributed elements, the computational costs of the FMM can be reduced drastically. A large-scale micromagnetic simulation of a single-pole-type head demonstrates the effectiveness of the specialized FMM from the viewpoints of calculation time and memory requirements, compared with the FFT.

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Micromagnetic Simulations of Perpendicular Single-Pole-Type Head for Various Pole Tip Structures

Kanai¹,

Saiki²,

Yoshida³

2006 12th Biennial IEEE Conference on Electromagnetic Field Computation

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Calculations of magnetization configurations of SPT head using micromagnetic model

Cited by 11 publications

References 4 publications

Strain imaging of a perpendicular recording head in a Hard Disk Drive

Strain imaging of a perpendicular recording head in a Hard Disk Drive

Micromagnetic simulation by using the fast multipole method specialized for uniform brick elements

Micromagnetic Simulations of Perpendicular Single-Pole-Type Head for Various Pole Tip Structures

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