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Your search keyword '"Nozaki, Takayuki"' showing total 35 results
Start Over Author "Nozaki, Takayuki" Publisher iop publishing
35 results on '"Nozaki, Takayuki"'

14. Characterization of the magnetic moments of ultrathin Fe film in an external electric field via high-precision X-ray magnetic circular dichroism spectroscopy

Author

Tsukahara, Takuya, primary, Kawabe, Takeshi, additional, Shimose, Koki, additional, Furuta, Taishi, additional, Miyakaze, Risa, additional, Nawaoka, Kohei, additional, Goto, Minori, additional, Nozaki, Takayuki, additional, Yuasa, Shinji, additional, Kotani, Yoshinori, additional, Toyoki, Kentaro, additional, Suzuki, Motohiro, additional, Nakamura, Tetsuya, additional, Suzuki, Yoshishige, additional, and Miwa, Shinji, additional

Published
2017
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15. Temperature dependence of higher-order magnetic anisotropy constants and voltage-controlled magnetic anisotropy effect in a Cr/Fe/MgO junction.

Author

Sugihara, Atsushi, Spiesser, Aurelie, Nozaki, Takayuki, Kubota, Hitoshi, Imamura, Hiroshi, Fukushima, Akio, Yakushiji, Kay, and Yuasa, Shinji

Abstract

The temperature dependence of the first- and second-order magnetic anisotropies, Ku1 and Ku2, was studied with a view to investigating the voltage-controlled magnetic anisotropy (VCMA) effect in Cr/ultrathin Fe/MgO structures. The Ku1 term increased with decreasing temperature, whereas the Ku2 term exhibited relatively small temperature dependence. The VCMA coefficient in the Ku1 term increased while that in the Ku2 term decreased at low temperature. Moreover, the signs of the VCMA coefficient for Ku1 and Ku2 were opposite signs and compensated each other, the trend of which provides evidence of enhancement of the effective VCMA coefficient at low temperature. [ABSTRACT FROM AUTHOR]

Published
2020
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20. Bias field angle dependence of the self-oscillation of spin torque oscillators having a perpendicularly magnetized free layer and in-plane magnetized reference layer

Author

Tamaru, Shingo, primary, Kubota, Hitoshi, additional, Yakushiji, Kay, additional, Nozaki, Takayuki, additional, Konoto, Makoto, additional, Fukushima, Akio, additional, Imamura, Hiroshi, additional, Taniguchi, Tomohiro, additional, Arai, Hiroko, additional, Yamaji, Toshiki, additional, and Yuasa, Shinji, additional

Published
2014
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22. Spin-Torque Oscillator Based on Magnetic Tunnel Junction with a Perpendicularly Magnetized Free Layer and In-Plane Magnetized Polarizer

Author

Kubota, Hitoshi, primary, Yakushiji, Kay, additional, Fukushima, Akio, additional, Tamaru, Shingo, additional, Konoto, Makoto, additional, Nozaki, Takayuki, additional, Ishibashi, Shota, additional, Saruya, Takeshi, additional, Yuasa, Shinji, additional, Taniguchi, Tomohiro, additional, Arai, Hiroko, additional, and Imamura, Hiroshi, additional

Published
2013
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26. Large Diode Sensitivity of CoFeB/MgO/CoFeB Magnetic Tunnel Junctions

Author

Ishibashi, Shota, primary, Seki, Takeshi, additional, Nozaki, Takayuki, additional, Kubota, Hitoshi, additional, Yakata, Satoshi, additional, Fukushima, Akio, additional, Yuasa, Shinji, additional, Maehara, Hiroki, additional, Tsunekawa, Koji, additional, Djayaprawira, David D., additional, and Suzuki, Yoshishige, additional

Published
2010
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30. Current-Field Driven “Spin Transistor”

Author

Konishi, Katsunori, primary, Nozaki, Takayuki, additional, Kubota, Hitoshi, additional, Fukushima, Akio, additional, Yuasa, Shinji, additional, Shiraishi, Masashi, additional, and Suzuki, Yoshishige, additional

Published
2009
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34. Microwave-Assisted Magnetization Reversal in a Perpendicularly Magnetized Film.

Author

Yoshioka, Takashi, Nozaki, Takayuki, Seki, Takeshi, Shiraishi, Masashi, Shinjo, Teruya, Suzuki, Yoshishige, and Uehara, Yuji

Abstract

Microwave-assisted magnetization reversal in a perpendicularly magnetized film was investigated using the anomalous Hall effect. Although the reversal process of the sample in this work was governed by nucleation and domain wall propagation, a large decrease in the reversal field, as much as 75% of the coercive field, was observed when the optimum rf magnetic field was applied. Our results indicate that the microwave-assisted effect promotes nucleation of the reversed domain leading to a reduction of the reversal field in a nucleation-type perpendicularly magnetized system. [ABSTRACT FROM AUTHOR]

Published
2010
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35. Voltage-Assisted Magnetization Switching in Ultrathin Fe80Co20 Alloy Layers.

Author

Shiota, Yoichi, Maruyama, Takuto, Nozaki, Takayuki, Shinjo, Teruya, Shiraishi, Masashi, and Suzuki, Yoshishige

Abstract

Growing demands for the voltage-driven spintronic applications with ultralow-power consumption have led to new interest in exploring the voltage-induced magnetization switching in ferromagnetic metals. In this study, we observed a large perpendicular magnetic anisotropy change in Au(001)/ultrathin Fe80Co20(001)/MgO(001)/polyimide/indium tin oxide (ITO) junctions, and succeeded in realizing a clear switching of magnetic easy axis between in-plane and perpendicular directions. Furthermore, employing a perpendicularly magnetized film, voltage-induced magnetization switching in the perpendicular direction under the assistance of magnetic fields was demonstrated. These pioneering results may open a new window of electric-field controlled spintronics devices. [ABSTRACT FROM AUTHOR]

Published
2009
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