研究者詳細 - 田中　将嗣

論文 - 田中　将嗣

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Growth and superconducting properties of Cd-doped La(O,F)BiS#D2#DR single crystals 査読有り

Masanori Nagao,Masashi Tanaka,Satoshi Watauchi,Yoshihiko Takano,Isao Tanaka

Solid State Communications 261 32 - 36 2017年08月

Phase Diagram of FeSe Deposited by Electrochemical Technique with Different Temperature and Voltage 査読有り

Aichi Yamashita, Masashi Tanaka, Hiroyuki Takeya, Yoshihiko Takano

Journal of the Physical Society of Japan 86 ( 7 ) 075001(1) - 075001(2) 2017年07月

記述言語：英語掲載種別：研究論文（学術雑誌）

High-quality crystalline FeSe is successfully synthesized in 5 min by an electrochemical deposition technique via increasing the solution temperature. The synthesis of FeSe have been controlled by the applied voltage, synthesis time and pH value. The obtained samples were summarized as a phase diagram at each temperature and applied voltage. The best synthesis temperature to produce high-quality crystalline samples was found to be 70 °C.

DOI： 10.7566/JPSJ.86.075001

Scopus

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Diamond anvil cell using metallic diamond electrodes 査読有り

Ryo Matsumoto, Tetsuo Irifune, Masashi Tanaka, Hiroyuki Takeya, Yoshihiko Takano

Japanese Journal of Applied Physics 56 ( 5 ) 05FC01-1 - 05FC01-2 2017年05月

記述言語：英語掲載種別：研究論文（学術雑誌）

A novel diamond anvil cell specialized for resistivity measurements under high pressure have been developed. Boron-doped metallic diamond electrodes were deposited onto a nano-polycrystalline diamond anvil using a microwave plasma-assisted chemical vapor deposition technique combined with electron beam lithography. The various designs of boron-doped metallic diamond electrodes were demonstrated, and they showed no signs of degradation after repeated compression.

DOI： 10.7567/JJAP.56.05FC01

Scopus

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Phase-separation control of KxFe2-ySe2 superconductor through rapid-quenching process 査読有り

Yanagisawa, Y., Tanaka, M.,Yamashita,A., Suzuki, K., Hara, H., ElMassalami, M., Takeya, H., Takano, Y.

J. Phys. Soc. Jpn. 86 ( 4 ) 043703 2017年04月

記述言語：英語掲載種別：研究論文（学術雑誌）

KxFe2-ySe2 exhibits iron-vacancy ordering at Ts ∼ 270 °C and separates into two phases: a minor superconducting (iron-vacancy-disordered) phase and a major non-superconducting (iron-vacancy-ordered) phase. The microstructural and superconducting properties of this intermixture can be tuned by an appropriate control of the quenching process through Ts. A faster quenching rate leads to a finer microstructure and a suppression of formation of the nonsuperconducting phase by up to 50%. Nevertheless, such a faster cooling rate induces a monotonic reduction in the superconducting transition temperature (from 30.7 to 26.0 K) and, simultaneously, a decrease in the iron content within the superconducting phase such that the compositional ratio changed from K0.35Fe1.83Se2 to K0.58Fe1.71Se2.

DOI： 10.7566/JPSJ.86.043703

Scopus

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Direct Observation of Micro Structure on the Superconducting Single Crystals of K#D#Ix#IR#DRFe#D2-#Iy#IR#DRSe#D2#DR 査読有り

Tanaka, M., Takeya, H., Takano, Y.

Appl. Phys. Express 10 ( 2 ) 023101 2017年02月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Potassium-intercalated FeSe has been reported as a superconductor with a superconducting transition temperature (Tc) of 30-48 K. However, the relationship among the surface morphology, compositional ratio, and crystal structure has not yet been clarified. This report directly reveals the correspondence among these three characteristics in single crystals with a Tc onset of around 44K by using a microsampling technique. Island-like parts on the surface of the crystals clearly exhibit the KxFe2Se2 structure with perfect FeSe layers, which is formed in conjunction with the K2Fe4Se5 phase. This results in the appearance of the Tc onset at 44 K.

DOI： 10.7567/APEX.10.023101

Scopus

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Transport properties of hydrogen-terminated silicon surface controlled by ionic-liquid gating 査読有り

Sasama Y., Yamaguchi T., Tanaka M., Takeya H., Takano Y.

J. Phys. Soc. Jpn. 86 ( 1 ) 14703 2017年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

We fabricated electric double-layer transistors on the hydrogen-terminated (111)-oriented surface of non-doped silicon using ionic liquid as a gate dielectric. We introduced hole carriers into silicon with the application of a negative gate voltage. The sheet resistance of silicon was controlled by more than three orders of magnitude at 220K by changing the gate voltage. The temperature dependence of sheet resistance became weak as the gate voltage was increased, suggesting the approach to an insulator-metal transition.

DOI： 10.7566/JPSJ.86.014703

Scopus

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Spin-induced anomalous magnetoresistance at the (100) surface of hydrogen-terminated diamond 査読有り

Takahide Y., Sasama Y., Tanaka M., Takeya H., Takano Y., Kageura T., Kawarada H.

Phys. Rev. B 94 ( 16 ) 161301 2016年10月

Discovery of the Pt-Based Superconductor LaPt5As 査読有り

Fujioka M., Ishimaru M., Shibuya T., Kamihara Y., Tabata C., Amitsuka H., Miura A., Tanaka M., Takano Y., Kaiju H., Nishii J.

J. Am. Chem. Soc. 138 ( 31 ) 9927 - 9934 2016年08月

Origin of Pressure-induced Superconducting Phase in KxFe2-ySe2 studied by Synchrotron X-ray Diffraction and Spectroscopy 査読有り

Yamamoto Y., Yamaoka H., Tanaka M., Okazaki H., Ozaki T., Takano Y., Lin J.-F., Fujita H., Kagayama T., Shimizu K., Hiraoka N., Ishii H., Liao Y.-F., Tsuei K.-D., Mizuki J.

Sci. Rep. 6 30946 2016年08月

Novel diamond anvil cell for electrical measurements using boron-doped metallic diamond electrodes 査読有り国際誌

R. Matsumoto, Y. Sasama, M. Fujioka, T. Irifune, M. Tanaka, T. Yamaguchi, H. Takeya, Y. Takano

Review of Scientific Instruments 87 ( 7 ) 076103 2016年07月

Observation of a hidden hole-like band approaching the fermi level in K-doped iron selenide superconductor 査読有り

Sunagawa M., Terashima K., Hamada T., Fujiwara H., Fukura T., Takeda A., Tanaka M., Takeya H., Takano Y., Arita M., Shimada K., Namatame H., Taniguchi M., Suzuki K., Usui H., Kuroki K., Wakita T., Muraoka Y., Yokoya T.

J. Phys. Soc. Jpn. 85 ( 7 ) 73704 2016年07月

Superconductivity in alkali-doped fullerene nanowhiskers 査読有り

Takeya H., Konno T., Hirata C., Wakahara T., Miyazawa K., Yamaguchi T., Tanaka M., Takano Y.

J Phys Condens Matter 28 ( 35 ) 354003 2016年07月

Growth and structure of Ce(O,F)SbS2 single crystals 査読有り

Nagao M., Tanaka M., Matsumoto R., Tanaka H., Watauchi S., Takano Y., Tanaka I.

Cryst. Growth Des. 16 ( 5 ) 3037 - 3042 2016年05月

Origin of the higher-Tc phase in the KxFe2-ySe2 system 査読有り

Tanaka M., Yanagisawa Y., Denholme S.J., Fujioka M., Funahashi S., Matsushita Y., Ishizawa N., Yamaguchi T., Takeya H., Takano Y.

J. Phys. Soc. Jpn. 85 ( 4 ) 44710 2016年04月

Electrochemical deposition of FeSe on RABiTS tapes 査読有り

Demura S., Tanaka M., Yamashita A., Denholme S.J., Okazaki H., Fujioka M., Yamaguchi T., Takeya H., Iida K., Holzapfel B., Sakata H., Takano Y.

J. Phys. Soc. Jpn. 85 ( 1 ) 15001 2016年01月

Scanning Tunnelling Microscopy and Spectroscopy of the Layered Nitride Superconductor α-NaxTiNCl 査読有り

Sugimoto A., Sakai Y., Ekino T., Zhang S., Tanaka M., Yamanaka S., Gabovich A.M.

Phys. Procedia 81 73 - 76 2016年01月

Pressure-Induced Superconductivity in BiS2-Based EuFBiS2 査読有り

Suzuki K., Tanaka M., Denholme S.J., Fujioka M., Yamaguchi T., Takeya H., Takano Y.

J. Phys. Soc. Jpn. 84 ( 11 ) 115003 2015年11月

Observation of a pressure-induced phase transition for single crystalline LaO0.5F0.5BiSeS using a diamond anvil cell 査読有り

Fujioka M., Matsumoto R., Yamaki T., Denholme S.J., Tanaka M., Takeya H., Yamaguchi T., Takahashi H., Takano Y.

J. Phys. Soc. Jpn. 84 ( 9 ) 95001 2015年09月

Site selectivity on chalcogen atoms in superconducting La(O,F)BiSSe 査読有り

Tanaka M., Yamaki T., Matsushita Y., Fujioka M., Denholme S.J., Yamaguchi T., Takeya H., Takano Y.

Appl. Phys. Lett. 106 ( 11 ) 112601 2015年03月

Superconductivity in FeTe1-xSx induced by electrochemical reaction using ionic liquid solution 査読有り

Yamashita A., Demura S., Tanaka M., Fujioka M., Denholme S.J., Deguchi K., Yamaki T., Hara H., Suzuki K., Okazaki H., Yamaguchi T., Takeya H., Takano Y.

J. Phys. Soc. Jpn. 84 ( 3 ) 34706 2015年03月

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