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Journal Articles

Core radial electric field and transport in Wendelstein 7-X plasmas

N. A. Pablant, A. Langenberg, A. Alonso, C. D. Beidler, M. Bitter, S. Bozhenkov, R. Burhenn, M. Beurskens, L. Delgado-Aparicio, A. Dinklage, G. Fuchert, D. Gates, J. Geiger, K. W. Hill, U. Höfel, M. Hirsch, J. Knauer, A. Krämer-Flecken, M. Landreman, S. Lazerson, H. Maaßberg, O. Marchuk, S. Massidda, G. H. Neilson, E. Pasch, S. Satake, J. Svennson, P. Traverso, Y. Turkin, P. Valson, J. L. Velasco, G. Weir, T. Windisch, R. C. Wolf, M. Yokoyama, D. Zhang, W7-X Team
Journal: Physics of Plasmas
Phys. Plasmas 25, 022508 (2018)
https://doi.org/10.1063/1.4999842
Published: February 2018
View article titled, Core radial electric field and transport in Wendelstein 7-X plasmas
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Journal Articles

Observation of the inward propagation of spontaneous toroidal flow from the plasma boundary in LHD

K. Kamiya, K. Ida, K. Itoh, S.-I. Itoh, M. Yoshinuma, M. Yokoyama, S. Kubo, H. Tsuchiya, N. Tamura, S. Masuzaki, C. Suzuki, T. Akiyama, LHD Experiment Group
Journal: Physics of Plasmas
Phys. Plasmas 23, 102309 (2016)
https://doi.org/10.1063/1.4965908
Published: October 2016
View article titled, Observation of the inward propagation of spontaneous toroidal flow from the plasma boundary in LHD
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Journal Articles

Low temperature formation of higher-k cubic phase HfO2 by atomic layer deposition on GeOx/Ge structures fabricated by in-situ thermal oxidation

R. Zhang, P.-C. Huang, N. Taoka, M. Yokoyama, M. Takenaka, S. Takagi
Journal: Applied Physics Letters
Appl. Phys. Lett. 108, 052903 (2016)
https://doi.org/10.1063/1.4941538
Published: February 2016
View article titled, Low temperature formation of higher-<em>k</em> cubic phase HfO<sub>2</sub> by atomic layer deposition on GeO<sub>x</sub>/Ge structures fabricated by <em>in-situ</em> thermal oxidation
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Journal Articles

Operation of the GaSb p-channel metal-oxide-semiconductor field-effect transistors fabricated on (111)A surfaces

K. Nishi, M. Yokoyama, H. Yokoyama, T. Hoshi, H. Sugiyama, M. Takenaka, S. Takagi
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 233503 (2014)
https://doi.org/10.1063/1.4903837
Published: December 2014
View article titled, Operation of the GaSb p-channel metal-oxide-semiconductor field-effect transistors fabricated on (111)A surfaces
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Journal Articles

Extension of high Te regime with upgraded electron cyclotron resonance heating system in the Large Helical Device

H. Takahashi, T. Shimozuma, S. Kubo, Y. Yoshimura, H. Igami, S. Ito, S. Kobayashi, Y. Mizuno, K. Okada, T. Mutoh, K. Nagaoka, S. Murakami, M. Osakabe, I. Yamada, H. Nakano, M. Yokoyama, T. Ido, A. Shimizu, R. Seki, K. Ida, M. Yoshinuma, T. Kariya, R. Minami, T. Imai, N. B. Marushchenko, Y. Turkin, LHD Experiment Group
Journal: Physics of Plasmas
Phys. Plasmas 21, 061506 (2014)
https://doi.org/10.1063/1.4884365
Published: June 2014
View article titled, Extension of high <em>T</em><sub>e</sub> regime with upgraded electron cyclotron resonance heating system in the Large Helical Device
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Journal Articles

Extension of high Te regime with upgraded ECRH system in the LHD

H. Takahashi, T. Shimozuma, S. Kubo, Y. Yoshimura, H. Igami, S. Ito, S. Kobayashi, Y. Mizuno, K. Okada, T. Mutoh, K. Nagaoka, S. Murakami, M. Osakabe, I. Yamada, H. Nakano, M. Yokoyama, T. Ido, A. Shimizu, R. Seki, K. Ida, M. Yoshinuma, T. Kariya, R. Minami, T. Imai, LHD experiment group
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1580, 145–152 (2014)
https://doi.org/10.1063/1.4864513
Published: February 2014
View article titled, Extension of high <em>T</em><sub>e</sub> regime with upgraded ECRH system in the LHD
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Journal Articles

3-D effects on viscosity and generation of toroidal and poloidal flows in LHD

K. Nagaoka, K. Ida, M. Yoshinuma, Y. Suzuki, K. Kamiya, S. Satake, K. Tanaka, M. Yokoyama, S. Murakami, M. Osakabe, H. Takahashi, R. Seki, C. Suzuki, Y. Narushima, H. Nakano, M. Kisaki, K. Ikeda, K. Tsumori, Y. Takeiri, O. Kaneko, H. Yamada, LHD Experiment Group
Journal: Physics of Plasmas
Phys. Plasmas 20, 056116 (2013)
https://doi.org/10.1063/1.4807126
Published: May 2013
View article titled, 3-D effects on viscosity and generation of toroidal and poloidal flows in LHD
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Journal Articles

1-nm-capacitance-equivalent-thickness HfO2/Al2O3/InGaAs metal-oxide-semiconductor structure with low interface trap density and low gate leakage current density

R. Suzuki, N. Taoka, M. Yokoyama, S. Lee, S. H. Kim, T. Hoshii, T. Yasuda, W. Jevasuwan, T. Maeda, O. Ichikawa, N. Fukuhara, M. Hata, M. Takenaka, S. Takagi
Journal: Applied Physics Letters
Appl. Phys. Lett. 100, 132906 (2012)
https://doi.org/10.1063/1.3698095
Published: March 2012
View article titled, 1-nm-capacitance-equivalent-thickness HfO<sub>2</sub>/Al<sub>2</sub>O<sub>3</sub>/InGaAs metal-oxide-semiconductor structure with low interface trap density and low gate leakage current density
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Journal Articles

Two-dimensional solid solution alloy of Bi-Pb binary films on Rh(111)

J. Yuhara, M. Yokoyama, T. Matsui
Journal: Journal of Applied Physics
J. Appl. Phys. 110, 074314 (2011)
https://doi.org/10.1063/1.3650883
Published: October 2011
View article titled, Two-dimensional solid solution alloy of Bi-Pb binary films on Rh(111)
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Journal Articles

Impact of InGaAs surface nitridation on interface properties of InGaAs metal-oxide-semiconductor capacitors using electron cyclotron resonance plasma sputtering SiO 2

T. Hoshii, M. Yokoyama, H. Yamada, M. Hata, T. Yasuda, M. Takenaka, S. Takagi
Journal: Applied Physics Letters
Appl. Phys. Lett. 97, 132102 (2010)
https://doi.org/10.1063/1.3464170
Published: September 2010
View article titled, Impact of InGaAs surface nitridation on interface properties of InGaAs metal-oxide-semiconductor capacitors using electron cyclotron resonance plasma sputtering SiO 2
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Journal Articles

Study of CERC using newly installed 77 GHz Gyrotron in LHD

H. Takahashi, T. Shimozuma, M. Yokoyama, T. Ido, S. Kubo, A. Shimizu, Y. Yoshimura, H. Igami, T. Mutoh, LHD experimental group
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1187, 487–490 (2009)
https://doi.org/10.1063/1.3273798
Published: November 2009
View article titled, Study of CERC using newly installed 77 GHz Gyrotron in LHD
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Journal Articles

Observation of an impurity hole in a plasma with an ion internal transport barrier in the Large Helical Device

K. Ida, M. Yoshinuma, M. Osakabe, K. Nagaoka, M. Yokoyama, H. Funaba, C. Suzuki, T. Ido, A. Shimizu, I. Murakami, N. Tamura, H. Kasahara, Y. Takeiri, K. Ikeda, K. Tsumori, O. Kaneko, S. Morita, M. Goto, K. Tanaka, K. Narihara, T. Minami, I. Yamada, LHD Experimental Group
Journal: Physics of Plasmas
Phys. Plasmas 16, 056111 (2009)
https://doi.org/10.1063/1.3111097
Published: April 2009
View article titled, Observation of an impurity hole in a plasma with an ion internal transport barrier in the Large Helical Device
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Journal Articles

Configuration Control Studies in Heliotron J

T. Mizuuchi, S. Kobayashi, S. Yamamoto, H. Okada, K. Nagasaki, G. Motojima, S. Watanabe, H. Arimoto, K. Murai, F. Hamagami, D. Katayama, H. Matsuoka, A. Nakajima, H. Takahashi, H. Yasuda, K. Mukai, A. Matsuyama, Y. Kowada, K. Hosaka, S. Mihara, N. Nishino, T. Minami, Y. Nakashima, Y. Suzuki, S. Murakami, K. Watanabe, M. Yokoyama, Y. Nakamura, K. Hanatani, K. Kondo, S. Okamura, F. Sano
Journal: AIP Conference Proceedings
AIP Conf. Proc. 996, 259–268 (2008)
https://doi.org/10.1063/1.2917021
Published: April 2008
View article titled, Configuration Control Studies in Heliotron J
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Journal Articles

Extension of the high-ion-temperature regime in the Large Helical Device

M. Yokoyama, K. Nagaoka, M. Yoshinuma, Y. Takeiri, K. Ida, S. Morita, O. Kaneko, T. Seki, H. Kasahara, T. Mutoh, Y. Oka, K. Tsumori, M. Osakabe, K. Ikeda, K. Tanaka, H. Funaba, S. Matsuoka, S. Masuzaki, J. Miyazawa, R. Sakamoto, H. Yamada, K. Kawahata, N. Ohyabu, S. Imagawa, A. Komori, S. Sudo, O. Motojima, the LHD Experimental Group
Journal: Physics of Plasmas
Phys. Plasmas 15, 056111 (2008)
https://doi.org/10.1063/1.2890755
Published: March 2008
View article titled, Extension of the high-ion-temperature regime in the Large Helical Device
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Journal Articles

Hydrodynamic Property of Oscillating Superfluid 3He in Aerogel

K. Obara, Y. Nago, H. Yano, O. Ishikawa, T. Hata, H. Yokogawa, M. Yokoyama
Journal: AIP Conference Proceedings
AIP Conf. Proc. 850, 231–232 (2006)
https://doi.org/10.1063/1.2354678
Published: September 2006
View article titled, Hydrodynamic Property of Oscillating Superfluid <sup>3</sup>He in Aerogel
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Journal Articles

Semiconductor waveguide optical isolator based on nonreciprocal loss induced by ferromagnetic MnAs

T. Amemiya, H. Shimizu, Y. Nakano, P. N. Hai, M. Yokoyama, M. Tanaka
Journal: Applied Physics Letters
Appl. Phys. Lett. 89, 021104 (2006)
https://doi.org/10.1063/1.2220016
Published: July 2006
View article titled, Semiconductor waveguide optical isolator based on nonreciprocal loss induced by ferromagnetic MnAs
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Journal Articles

Large magnetoresistance ( > 600 % ) of a GaAs:MnAs granular thin film at room temperature

M. Yokoyama, T. Ogawa, A. M. Nazmul, M. Tanaka
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 99, 08D502 (2006)
https://doi.org/10.1063/1.2151817
Published: April 2006
View article titled, Large magnetoresistance ( &gt; 600 % ) of a GaAs:MnAs granular thin film at room temperature
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Journal Articles

Growth and magnetic properties of epitaxial MnAs thin films grown on InP(001)

M. Yokoyama, S. Ohya, M. Tanaka
Journal: Applied Physics Letters
Appl. Phys. Lett. 88, 012504 (2006)
https://doi.org/10.1063/1.2159098
Published: January 2006
View article titled, Growth and magnetic properties of epitaxial MnAs thin films grown on InP(001)
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Journal Articles

Zinc-blende-type MnAs nanoclusters embedded in GaAs

M. Yokoyama, H. Yamaguchi, T. Ogawa, M. Tanaka
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 97, 10D317 (2005)
https://doi.org/10.1063/1.1852214
Published: May 2005
View article titled, Zinc-blende-type MnAs nanoclusters embedded in GaAs
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Journal Articles

Characteristics of transport in electron internal transport barriers and in the vicinity of rational surfaces in the Large Helical Device

K. Ida, S. Inagaki, T. Shimozuma, N. Tamura, H. Funaba, K. Narihara, S. Kubo, S. Murakami, A. Wakasa, M. Yokoyama, Y. Takeiri, K. Y. Watanabe, K. Tanaka, M. Yoshinuma, Y. Liang, N. Ohyabu, T. Akiyama, N. Ashikawa, M. Emoto, T. Fujita, T. Fukuda, P. Goncharov, M. Goto, H. Idei, K. Ikeda, A. Isayama, M. Isobe, O. Kaneko, K. Kawahata, H. Kawazome, T. Kobuchi, A. Komori, R. Kumazawa, S. Masuzaki, T. Minami, J. Miyazawa, T. Morisaki, S. Morita, S. Muto, T. Mutoh, Y. Nagayama, Y. Nakamura, H. Nakanishi, Y. Narushima, K. Nishimura, N. Noda, T. Notake, H. Nozato, S. Ohdachi, Y. Oka, S. Okajima, M. Osakabe, T. Ozaki, B. J. Peterson, A. Sagara, T. Saida, K. Saito, S. Sakakibara, R. Sakamoto, Y. Sakamoto, M. Sasao, K. Sato, M. Sato, T. Seki, M. Shoji, H. Suzuki, N. Takeuchi, K. Toi, T. Tokuzawa, Y. Torii, K. Tsumori, T. Watari, H. Yamada, I. Yamada, S. Yamamoto, T. Yamamoto, Y. Yoshimura, K. Itoh, K. Matsuoka, K. Ohkubo, S. Sudo, T. Uda, K. Yamazaki, O. Motojima
Journal: Physics of Plasmas
Phys. Plasmas 11, 2551–2557 (2004)
https://doi.org/10.1063/1.1688787
Published: May 2004
View article titled, Characteristics of transport in electron internal transport barriers and in the vicinity of rational surfaces in the Large Helical Device
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