Recording Head Design

Mallary, M.L.

doi:10.1007/978-3-642-56657-8_11

Cited by 5 publications

(2 citation statements)

References 22 publications

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“…These images provide direct experimental confirmation of the "flux beaming" that has been proposed to explain the operation of the yoke. 12,13 The beaming of the magnetic flux along the SA occurs because the magnetization at the edges of the yoke is less able to rotate in response to the pulsed field since this would induce magnetic charges at the edges and hence additional demagnetizing fields. A well optimized yoke is designed to spread the magnetic flux into a wider path, when moving from the confluence region past the coil windings towards a via at point A, so as to retain high permeability, avoid saturation, and minimize the time for magnetization rotation.…”

Section: -2mentioning

confidence: 99%

Time- and vector-resolved Kerr microscopy of hard disk writers

Gangmei

Keatley

et al. 2011

Applied Physics Letters

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Hard HfB2 tip-coatings for ultrahigh density probe-based storage Appl. Phys. Lett. 101, 091909 (2012) On the lifetime of plasmonic transducers in heat assisted magnetic recording J. Appl. Phys. 112, 034512 (2012) Fast electrothermally activated micro-positioner using a high-aspect-ratio micro-machined polymeric composite Appl. Phys. Lett. 101, 033108 (2012) Application of Landau-Lifshitz-Bloch dynamics to grain switching in heat-assisted magnetic recording

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Section: -2mentioning

confidence: 99%

Time- and vector-resolved Kerr microscopy of hard disk writers

Gangmei

Keatley

et al. 2011

Applied Physics Letters

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“…As already mentioned, the writer part of the head is quite different for a perpendicular recording system as is shown schematically in Fig. 36 and reviewed by Mallary (2001). In the previous discussion on the properties of SULs it was shown that unlike longitudinal recording, where the fringing field from a ring head is responsible for writing the medium, for perpendicular recording the head and SUL have to be considered as a single magnetic circuit.…”

Section: Headsmentioning

confidence: 99%

Magnetic Data Storage: Past Present and Future

Thomson

Abelmann

Groenland

Magnetic Nanostructures in Modern Technology

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The design of media, heads, positioning systems and data detection and coding techniques for various generations of magnetic recording systems are discussed. We will start with current systems, such as longitudinal hard disc and tape. Next we will discuss the near future, where perpendicular recording (thicker films, higher stray fields) will address the problem of thermal stability. In the third section we will give an outlook on future developments (patterned media, thermally assisted recording, self assembled arrays of nanoparticles and probe storage).

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Time-resolved scanning Kerr microscopy of flux beam formation in hard disk write heads

Valkass

Spicer

Burgos-Parra

et al. 2016

Journal of Applied Physics

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To meet growing data storage needs, the density of data stored on hard disk drives must increase. In pursuit of this aim the magnetodynamics of the hard disk write head must be characterized and understood, particularly the process of "flux beaming". In this study, seven different configurations of perpendicular magnetic recording (PMR) write heads were imaged using time-resolved scanning Kerr microscopy, revealing their detailed dynamic magnetic state during the write process. It was found that the precise position and number of driving coils can significantly alter the formation of flux beams during the write process. These results are applicable to the design and understanding of current PMR and next-generation heat-assisted magnetic recording (HAMR) devices, as well as being relevant to other magnetic devices. a) Corresponding author. rajv202@ex.ac.uk

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Recording Head Design

Cited by 5 publications

References 22 publications

Time- and vector-resolved Kerr microscopy of hard disk writers

Time- and vector-resolved Kerr microscopy of hard disk writers

Magnetic Data Storage: Past Present and Future

Time-resolved scanning Kerr microscopy of flux beam formation in hard disk write heads

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