Texture effects in particulate media

Gonzalez-Fernandez, M.A.; Blocksidge, G.; Bunce, C.; O’Grady, K.; El‐Hilo, M.; Sharrock, M.P.; Seftick, D.

doi:10.1016/j.jmmm.2004.11.511

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…The predicted parallel remanence curves are used to extract the texture distribution function following the well-established technique [4]. In that technique, the parallel reduced remanence and the texture distribution functions are expanded as Fourier series where the number of terms in the series expansion is determined by the least number of terms needed to fit the M rsp (b) data.…”

Section: Resultsmentioning

confidence: 99%

“…In textured patterned media with hexagonal arrays arrangement of grains, dipolar coupling is found to give rise to a sharp magnetization reversal [3]. In 2D longitudinal recording media, analysis of the measured parallel remanence M rp (b) as a function of angle of rotation b is a wellestablished technique to extract the distribution of anisotropy orientations [4]. The technique was based on Shrikman and Treves theory in which analysis of parallel M rp (b) or transverse M rt (b) remanence curves for 3D magnetic systems gives the texture function [5].…”

Section: Introductionmentioning

confidence: 99%

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Simulations of parallel and transverse remanences in textured nano-patterned thin film media

El‐Hilo

2010

Journal of Magnetism and Magnetic Materials

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulations of parallel and transverse remanences in textured nano-patterned thin film media

El‐Hilo

2010

Journal of Magnetism and Magnetic Materials

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“…Because of the averaging of a global measurement this indicates that a significant number of particles are seriously misaligned. We have measured the alignment both physically and magnetically and reported in detail on these effects previously [15]. Hence the data in figure 4(b) may not indicate that all particles within the distribution reverse via incoherent fanning and it is possible that some of the particles may reverse coherently.…”

Section: Previous Studies Of Advanced Mp Pigmentsmentioning

confidence: 95%

Development of metal particle (MP) technology for flexible recording media

Chadwick

Virden

Haehnel

et al. 2008

J. Phys. D: Appl. Phys.

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We report on magnetisation reversal processes in metal particle (MP) pigments and tapes which are the standard for all advanced data storage formats on flexible substrates. In addition to describing the basis of the technology and the principles of the preparation process, we describe the origin of the magnetic properties and how these are controlled to meet the specifications for advanced storage formats. Critical to the application of any material as a data storage medium is the switching field distribution (SFD) which is controlled by the particle size distribution (PSD), the magnetic anisotropy (K), the magnetisation reversal mechanism of the particles and particularly the alignment of the particle easy axes on the tape. We describe how each of these parameters in turn is measured and how control of the parameters is achieved. In particular, we find that close control of the PSD and particularly the particle orientation controls the effective SFD. In the most advanced systems the SFD is dominated by the alignment of the particles, which means that control of the particle morphology is required to obtain a high degree of easy axis alignment. In this regard we also describe new developments in MP technology and look to prospects for further advances.

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