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Proceedings Paper

A novel ultra-fine track-seeking servo micro-actuator for hybrid recording
Author(s): Changsheng Xie; Chun Liu; Haiwei Wang
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Paper 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.

Paper Details

Date Published: 15 September 2005
PDF: 6 pages
Proc. SPIE 5966, Seventh International Symposium on Optical Storage (ISOS 2005), 59660L (15 September 2005); doi: 10.1117/12.649617
Show Author Affiliations
Changsheng Xie, Huazhong Univ. of Science and Technology (China)
Chun Liu, Huazhong Univ. of Science and Technology (China)
Haiwei Wang, Huazhong Univ. of Science and Technology (China)

Published in SPIE Proceedings Vol. 5966:
Seventh International Symposium on Optical Storage (ISOS 2005)
Fuxi Gan; Lisong Hou, Editor(s)

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