Nanodomain Formation on Ferroelectrics and Development of Hard-Disk-Drive-Type Ferroelectric Data Storage Devices
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概要
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In this study, several read/write (R/W) tests were conducted using a hard-disk-drive-type ferroelectric data storage test system based on scanning nonlinear dielectric microscopy (SNDM). A periodically inverted signal, which corresponded to artificial domain stripes formed on LiTaO3 single crystal, could be read correctly with a bit rate of 2 Mbps using this test system. Bit writing on a 50-nm-thick epitaxial LiTaO3 film at 20 Mbps was also demonstrated. In addition, a noncontact probe-height control technique was adapted to solve the problem of tip abrasion. The gap distance between a probe and a medium surface was successfully controlled on the nanometer order using a noncontact SNDM technique with sharp-pointed tungsten needle probes prepared by electrolytic polishing. Bit writing under a noncontact state was also studied. Artificial domain dots with diameters of less than 100 nm could be formed under the noncontact state.
- 2009-09-25
著者
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Cho Yasuo
Research Institute Of Electrical Communication Tohoku University
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Hiranaga Yoshiomi
Research Institute Of Electrical Communication Tohoku University
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Kadota Michio
Murata Manufacturing Co., Ltd., Nagaokakyo, Kyoto 617-8555, Japan
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Kadota Michio
Murata Manufacturing Co., Ltd., Yasu, Shiga 520-2393, Japan
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Tochishita Hikari
Murata MFG Co., Ltd., Nagaokakyo, Kyoto 617-8555, Japan
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Uda Tomoya
Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
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Kurihashi Yuichi
Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
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Kurihashi Yuichi
Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Uda Tomoya
Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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Tochishita Hikari
Murata Manufacturing Co., Ltd., Yasu, Shiga 520-2393, Japan
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Hiranaga Yoshiomi
Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
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Cho Yasuo
Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
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