Micromagnetic simulations of sweep-rate dependent coercivity in perpendicular recording media
| Autor: | J. P. Whitehead, J. van Ek, M. D. Leblanc, Martin L. Plumer |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
010302 applied physics
Materials science Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics General Physics and Astronomy Perpendicular recording Thermal fluctuations FOS: Physical sciences 02 engineering and technology Coercivity 021001 nanoscience & nanotechnology 01 natural sciences Condensed Matter - Other Condensed Matter Sweep rate 0103 physical sciences Thermal Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Perpendicular 0210 nano-technology Micromagnetics Scaling Other Condensed Matter (cond-mat.other) |
| DOI: | 10.48550/arxiv.1203.3340 |
| Popis: | The results of micromagnetic simulations are presented which examine the impact of thermal fluctuations on sweep rate dependent coercivities of both single-layer and exchange-coupled-composite (ECC) perpendicular magnetic recording media. M-H loops are calculated at four temperatures and sweep rates spanning five decades with fields applied normal to the plane and at 45 degrees. The impact of interactions between grains is evaluated. The results indicate a significantly weaker sweep-rate dependence for ECC media suggesting more robustness to long-term thermal effects. Fitting the modeled results to Sharrock-like scaling proposed by Feng and Visscher [J. Appl. Phys. 95, 7043 (2004)] is successful only in the case of single-layer media with the field normal to the plane. Comment: 7 pages, 14 figures |
| Databáze: | OpenAIRE |
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