The switching time of the magnetization in perpendicular recording media

Lyberatos, A.

doi:10.1016/s0304-8853(02)00098-7

Cited by 5 publications

(1 citation statement)

References 9 publications

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“…Consequently for high data rate applications details of the dynamic reversal process of the SUL need to be understood. Modeling work has significantly contributed to the understanding of the underlaying physics [1,2] as well as experimental work using time-domain Kerr microscopy [3,4]. Experimental work so far, to the best of our knowledge, has been limited to the write current wave forms with rise-times of about 1 ns.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the head/medium magneto dynamics in perpendicular recording

Heidmann

Xiao

et al. 2005

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Experimental study of the head/medium magneto dynamics in perpendicular recording

Heidmann

Xiao

et al. 2005

Journal of Magnetism and Magnetic Materials

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Switching speed limitations in perpendicular magnetic recording media

Lyberatos

2003

Journal of Applied Physics

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A method to study switching speed limitations in high-frequency magnetic recording is presented. The characteristic parameter is the minimum irreversible switching time that is evaluated by numerical simulation of the writing of a dibit of two transitions using Landau–Lifshitz dynamics. The dibit is written on a perpendicular polycrystalline thin film medium using a single-pole head with a soft underlayer. We study the physical factors that determine the ultimate data rate and consider the problem of optimization of switching speed by changing the relative head-medium velocity, the magnetocrystalline anisotropy, the rise time of the head field, the head-medium separation, the exchange intergranular coupling, and the dispersion in the direction and magnitude of the local anisotropy.

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Effective spin dynamic control of CoFeB/Nd heterostructure by matched resistivity

Liang

Chen

Guo

et al. 2022

Applied Physics Letters

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The spin dynamics modulation has attracted extensive attention in the past decades. Rare-earth (RE) metals are essential participants in this context due to the large spin–orbit coupling. Here, with neodymium (Nd) capping, we achieve the enhancement on spin dynamic damping of Co40Fe40B20 (CFB) films by three times larger than that of CFB single layer. Based on the spin pumping theory, the interfacial spin mixing conductance [Formula: see text] is calculated as 7.3 × 1015 cm−2, which is one order larger than that of CFB/Pt. It leads to the large spin current transparency at CFB/Nd interface. By comparing of the resistivity of each layer, we found that the matched resistivity at two sides of the CFB/Nd interface plays an important role in the enhancement of [Formula: see text]. As a consequence, a high spin transparency of the CFB/Nd interface is obtained as 82%. In addition, damping enhancement of CFB is not changed promptly by inserting 1–2 nm Cu layer, but it is suppressed when the Cu layer is thicker than 3 nm, which is related to the thickness dependence of the Cu resistivity. Our study broadens the horizon for the application of rare-earth (RE) in spintronics.

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The switching time of the magnetization in perpendicular recording media

Cited by 5 publications

References 9 publications

Experimental study of the head/medium magneto dynamics in perpendicular recording

Experimental study of the head/medium magneto dynamics in perpendicular recording

Switching speed limitations in perpendicular magnetic recording media

Effective spin dynamic control of CoFeB/Nd heterostructure by matched resistivity

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