15 September 2005 A novel ultra-fine track-seeking servo micro-actuator for hybrid recording
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Proceedings Volume 5966, Seventh International Symposium on Optical Storage (ISOS 2005); 59660L (2005) https://doi.org/10.1117/12.649617
Event: Seventh International Symposium on Optical Storage (ISOS 2005), 2005, Zhanjiang, China
Abstract
In this paper, we propose a micro-actuator which can largely improve the capacity and performance of track servo of hybrid recording. The micro-actuator is not executed by normal piezoelectric materials but by rare earth giant magnetostrictive materials such as TbDyFe. Owing to the material's excellent performance, the micro-actuator can work under low voltage driving power conditions, which means that it can be dispense with high voltage driving power which the piezoelectric materials are indispensably, and can move the recording head with very high speed and accuracy. As a result, extremely high data-track density and fast access time can be achieved. The theoretically analysis and computation of the coupling magnetic field intensity of giant magnetostrictive material were carried out. The computation of micro-actuator indicates that there is 0.085μm deformation for a constant magnetic induction of 300mT, and the resulting deformation is a pure bending which corresponds to the real behavior of a thin film actuator.
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Changsheng Xie, Chun Liu, Haiwei Wang, "A novel ultra-fine track-seeking servo micro-actuator for hybrid recording", Proc. SPIE 5966, Seventh International Symposium on Optical Storage (ISOS 2005), 59660L (15 September 2005); doi: 10.1117/12.649617; https://doi.org/10.1117/12.649617
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