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1

Kinetic analysis of superconducting YBa2O7, by thermogravimetry in high vacuum

Kenzo Nagase, Hiroko Yokobayashi, Masae Kikuchi, Ayako Tokiwa, Yasuhiko Syono, Yoshiyuki Morioka

Journal:

Thermochimica Acta

Year:

1991

Language:

english

File:

PDF, 374 KB

english, 1991

2

Synthesis and crystal structure of Pb2Sr2(Ln,Ce)nCu3O6+2n+δ and Pb(Ba,Sr)2(Ln,Ce)nCu3O5+2n+δ (Ln=Y,n=3,4,… and 0⩽δ⩽2.0), layered structure compounds with multiple fluorite layers

Ayako Tokiwa, Takeo Oku, Masayasu Nagoshi, Yasuhiko Syono

Journal:

Physica C: Superconductivity

Year:

1991

Language:

english

File:

PDF, 1.27 MB

english, 1991

3

Changes in modulation period of Bi2Sr2 (Ca1−xNdx) Cu2Oa + δ and their relations to oxygen content

Takashi Onozuka, Ayako Tokiwa, Yasuhiko Syono, Yoji Koike, Yoshitami Saito

Journal:

Physica C: Superconductivity

Year:

1991

Language:

english

File:

PDF, 162 KB

english, 1991

4

Superconductivity and crystal structure of Pb(Ba,Sr)2(Ln,Ca)Cu3Oy and Pb(Ba,Sr)2(Ln,Ce)2Cu3Oy(Ln: lanthanoid) with (Pb,Cu) double layers

Ayako Tokiwa, Yasuhiko Syono, Takeo Oku, Masayasu Nagoshi

Journal:

Physica C: Superconductivity

Year:

1991

Language:

english

File:

PDF, 142 KB

english, 1991

5

Composition, crystal structure and superconducting properties of HgBaCuO and HgBaCaCuO superconductors

Ayako Tokiwa-Yamamoto, Kazuyuki Isawa, Makoto Itoh, Seiji Adachi, H. Yamauchi

Journal:

Physica C: Superconductivity

Year:

1993

Language:

english

File:

PDF, 556 KB

english, 1993

6

Disordering of Pb and Cu arrangements in the block layers of Pb2Sr2YCu3O8+δ and PbBaSrYCu3O7+δ by oxygen introduction

Ayako Tokiwa-Yamamoto, Fujio Izumi, Takeo Oku, Yasuhiko Syono

Journal:

Physica C: Superconductivity

Year:

1993

Language:

english

File:

PDF, 836 KB

english, 1993

7

Increase of Tc in HgBa2CuOy by reducing treatment

Makoto Itoh, Ayako Tokiwa-Yamamoto, Seiji Adachi, H. Yamauchi

Journal:

Physica C: Superconductivity

Year:

1993

Language:

english

File:

PDF, 175 KB

english, 1993

8

The effect of Pb doping in HgBa2Ca2Cu3O8+δ superconductor

Kazuyuki Isawa, Ayako Tokiwa-Yamamoto, Makoto Itoh, Seiji Adachi, H. Yamauchi

Journal:

Physica C: Superconductivity

Year:

1993

Language:

english

File:

PDF, 362 KB

english, 1993

9

Annealing effects on the Meissner signals from HgBaCaCuO superconductors

Seiji Adachi, Ayako Tokiwa-Yamamoto, Makoto Itoh, Kazuyuki Isawa, H. Yamauchi

Journal:

Physica C: Superconductivity

Year:

1993

Language:

english

File:

PDF, 224 KB

english, 1993

10

Encapsulation method for the synthesis of nearly single-phase superconducting HgBa2Ca2Cu3O8+δ with Tc⩾ 135 K

Kazuyuki Isawa, Ayako Tokiwa-Yamamoto, Makoto Itoh, Seiji Adachi, H. Yamauchi

Journal:

Physica C: Superconductivity

Year:

1994

Language:

english

File:

PDF, 364 KB

english, 1994

11

Effect of Tl doping on the phase stability of Hg2Ba2(Y,Ca)1Cu2O8−δ superconductors prepared by a high-pressure technique

Ayako Tokiwa-Yamamoto, Ta-i Tatsuki, Xiao-Jing Wu, Seiji Adachi, Keiichi Tanabe

Journal:

Physica C: Superconductivity

Year:

1996

Language:

english

File:

PDF, 733 KB

english, 1996

12

Superconductivity of (Hg0.7Tl0.3)2 Ba2Y1−xCaxCu2O8−δ (0 ≦ x ≦ 0.8) with a wide range of doping state

Ayako Tokiwa-Yamamoto, Ta-i Tatsuki, Seiji Adachi, Keiichi Tanabe

Journal:

Physica C: Superconductivity

Year:

1996

Language:

english

File:

PDF, 412 KB

english, 1996

13

Thermogravimetric study on HgBa2Can−1CunO2(n+1)+δ (n = 1, 2, 3) superconductors at various oxygen partial pressures

Ayako Tokiwa-Yamamoto, Atsushi Fukuoka, Makoto Itoh, Seiji Adachi, H Yamauchi, Keiichi Tanabe

Journal:

Physica C: Superconductivity

Year:

1996

Language:

english

File:

PDF, 466 KB

english, 1996

14

Substitution of methanol-d4 for the coordinated water in the trinuclear complexes, [M3(μ3-O)(μ-CH3COO)6(H2O)3]+ (M3=Ru3, Rh3 or Ru2Rh) in methanol-d4

Yoichi Sasaki, Akira Nagasawa, Ayako Tokiwa-Yamamoto, Tasuko Ito

Journal:

Inorganica Chimica Acta

Year:

1993

Language:

english

File:

PDF, 741 KB

english, 1993

15

XPS and XANES study onPb2Sr2YCu3O8+δ and PbBaSr(YCa)Cu3O7+δ

Masayasu Nagoshi, Ayako Tokiwa-Yamamoto, Yasuhiko Syono, Yasuo Fukuda, Masashi Tachiki

Journal:

Journal of Electron Spectroscopy and Related Phenomena

Year:

1998

Language:

english

File:

PDF, 309 KB

english, 1998

16

Different origins of Tc-suppression in YBa2(Cu1−xMx)3Oy(M=Co and Zn)

Shoji Terada, Norio Kobayashi, Hideo Iwasaki, Ayako Tokiwa, Masae Kikuchi, Yasuhiko Syono, Yoshio Muto

Journal:

Physica B: Condensed Matter

Year:

1990

Language:

english

File:

PDF, 301 KB

english, 1990

17

Proper composition for superconductivity in Pb(Ba, Sr)2(Y, Ca)Cu3O7

Ayako Tokiwa, Masayasu Nagoshi, Yasuhiko Syono

Journal:

Physica C: Superconductivity

Year:

1990

Language:

english

File:

PDF, 500 KB

english, 1990

18

Chemistry of superconducting Cu oxides with the block layers consisting of Tl, Pb and Bi ions

Yasuhiko Syono, Masae Kikuchi, Satoru Nakajima, Ayako Tokiwa

Journal:

Physica C: Superconductivity

Year:

1991

Language:

english

File:

PDF, 1.13 MB

english, 1991

19

Oxygen configuration and disordering in the superconductor (Hg0.7Tl0.3)2Ba2(Y0.8Ca0.2)Cu2O8+δ

Tomoko Ohta, Fujio Izumi, Ayako Tokiwa-Yamamoto, Keiichi Tanabe, Alan W. Hewat

Journal:

Physica C: Superconductivity

Year:

1997

Language:

english

File:

PDF, 643 KB

english, 1997

20

Bis(.mu.-acetato)(.mu.-oxo)-bis(tris(pyridine)ruthenium(III)) ion: a ruthenium analog of the hemerythrin active center

Sasaki, Yoichi., Suzuki, Masakazu., Tokiwa, Ayako., Ebihara, Masahiro., Yamaguchi, Tadashi., Kabuto, Chizuko., Ito, Tasuku.

Journal:

Journal of the American Chemical Society

Year:

1988

Language:

english

File:

PDF, 296 KB

english, 1988

21

Mixed ruthenium-rhodium trinuclear complex [Ru2Rh(.mu.3-O)(.mu.-CH3COO)6(L)3]+ (L = H2O or pyridine)

Sasaki, Yoichi, Tokiwa, Ayako, Ito, Tasuku

Journal:

Journal of the American Chemical Society

Year:

1987

Language:

english

File:

PDF, 935 KB

english, 1987

22

Preparation, structure, and properties of the bis(.mu.-acetato)(.mu.-oxo)ruthenium(III) dimers [Ru2(.mu.-CH3COO)2(.mu.-O)(py)6]2+ and [Ru2(.mu.-CH3COO)2(.mu.-O)(bpy)2(py)2]2+

Sasaki, Yoichi., Suzuki, Masakazu., Nagasawa, Akira., Tokiwa, Ayako., Ebihara, Masahiro., Yamaguchi, Tadashi., Kabuto, Chizuko., Ochi, Takashi., Ito, Tasuku.

Journal:

Inorganic Chemistry

Year:

1991

Language:

english

File:

PDF, 742 KB

english, 1991

23

Dependence of Raman Spectra of YBa 2 Cu 3 O 6 on Excitation Frequency

Morioka, Yoshiyuki, Tokiwa, Ayako, Kikuchi, Masae, Syono, Yasuhiko

Journal:

Molecular Crystals and Liquid Crystals Incorporating Nonlinear Optics

Year:

1990

Language:

english

File:

PDF, 216 KB

english, 1990

24

Shock-induced superconductivity of Tl2Ba2CuO6

Kikuchi, Masae, Syono, Yasuhiko, Kobayashi, Norio, Oku, Takeo, Aoyagi, Eiji, Hiraga, Kenji, Kusaba, Keiji, Atou, Toshiyuki, Tokiwa, Ayako, Fukuoka, Kiyoto, Nakajima, Satoru

Journal:

Applied Physics Letters

Year:

1990

Language:

english

File:

PDF, 597 KB

english, 1990

25

X-ray absorption study on PbBaSrYCu 3 O 7+δ and PbBaSr(Y, Ca)Cu 3 O 7+δ

Yamaguchi, Hirotaka, Oyanagi, Hiroyuki, Tokiwa, Ayako, Shono, Yasuhiko

Journal:

Year:

1992

Language:

english

File:

PDF, 280 KB

english, 1992

26

Pb-doping effect on irreversibility fields of HgBa2Ca2Cu3O8+δ superconductors

Isawa, Kazuyuki, Tokiwa-Yamamoto, Ayako, Itoh, Makoto, Adachi, Seiji, Yamauchi, H.

Journal:

Applied Physics Letters

Year:

1994

Language:

english

File:

PDF, 271 KB

english, 1994

27

Irreversibility line for a Pb-doped Hg-Ba-Ca-Cu-O superconductor

Isawa, Kazuyuki, Higuchi, Takamitsu, Machi, Takato, Tokiwa-Yamamoto, Ayako, Adachi, Seiji, Murakami, Masato, Yamauchi, H.

Journal:

Applied Physics Letters

Year:

1994

Language:

english

File:

PDF, 560 KB

english, 1994

28

[ACM Press the 2004 ACM SIGCHI International Conference - Singapore (2005.06.03-2005.06.05)] Proceedings of the 2004 ACM SIGCHI International Conference on Advances in computer entertainment technology - ACE '04 - The sensing board enhanced by interactive sound system for collaborative work

Kusunoki, Fusako, Isyama, Ayako, Tokiwa, Kouji, Nlshimura, Takuichi

Year:

2004

Language:

english

File:

PDF, 774 KB

english, 2004

29

Electron Energy Loss Spectroscopy on Oxygen K-Edge Fine Structure of YBa 2 Cu 3 O y Containing Dopants (La, Ca, Co)

Shindo, Daisuke, Hiraga, Kenji, Tokiwa, Ayako, Soga, Takeshi, Hojou, Kiichi, Furuno, Shigemi, Otsu, Hitoshi, Nakajima, Satoru, Hirabayashi, Makoto, Kikuchi, Masae, Syono, Yasuhiko

Journal:

Japanese Journal of Applied Physics

Year:

1989

Language:

english

File:

PDF, 611 KB

english, 1989

30

Synthesis and Superconductivity of a New High- T c Tl-Ba-Ca-Cu-O Phase

Kikuchi, Masae, Kobayashi, Norio, Iwasaki, Hideo, Shindo, Daisuke, Oku, Takeo, Tokiwa, Ayako, Kajitani, Tsuyoshi, Hiraga, Kenji, Syono, Yasuhiko, Muto, Yoshio

Journal:

Japanese Journal of Applied Physics

Year:

1988

File:

PDF, 843 KB

1988

31

Effect of Co Substitution on T c in YBa 2 Cu 3- x Co x O 7- y ( x =0∼1)

Shindo, Daisuke, Hiraga, Kenji, Hirabayashi, Makoto, Tokiwa, Ayako, Kikuchi, Masae, Syono, Yasuhiko, Nakatsu, Osamu, Kobayashi, Norio, Muto, Yoshio, Aoyagi, Eiji

Journal:

Japanese Journal of Applied Physics

Year:

1987

Language:

english

File:

PDF, 1.35 MB

english, 1987

32

An X-Ray Diffraction and Electron Microscopic Study of a New High- T c Superconductor based on the Bi-Ca-Sr-Cu-O System

Syono, Yasuhiko, Hiraga, Kenji, Kobayashi, Norio, Kikuchi, Masae, Kusaba, Keiji, Kajitani, Tsuyoshi, Shindo, Daisuke, Hosoya, Syoichi, Tokiwa, Ayako, Terada, Shoji, Muto, Yoshio

Journal:

Japanese Journal of Applied Physics

Year:

1988

File:

PDF, 960 KB

1988

33

Crystal Structure and Superconductivity Controlled by Cation Substitution and Oxygen Annealing in Y 1- x Ca x Ba 2 Cu 3 O y and YBa 2- x La x Cu 3 O y

Tokiwa, Ayako, Syono, Yasuhiko, Kikuchi, Masae, Suzuki, Reiko, Kajitani, Tsuyoshi, Kobayashi, Norio, Sasaki, Takako, Nakatsu, Osamu, Muto, Yoshio

Journal:

Japanese Journal of Applied Physics

Year:

1988

File:

PDF, 563 KB

1988

34

A New Homologous Series of Superconducting Cuprates with the $\bf 22({\mbi n}-1){\mbi n}$ Structure, $\bf (Hg_{1-{\ninmbi x}}Tl_{\ninmbi x})_{2}Ba_{2}Ca_{{\ninmbi n}-1}Cu_{\ninmbi n}O_{\ninmbi y}$ ($\bf {\mbi x}\sim 0.4,~{\mbi n}\,=\,3,~4$)

Tatsuki, Tadashi, Tokiwa-Yamamoto, Ayako, Fukuoka, Atsushi, Tamura, Toshiyuki, Wu, Xiao-Jing, Moriwaki, Yoshiyuki, Usami, Ryo, Adachi, Seiji, Tanabe, Keiichi, Tanaka, Shoji

Journal:

Japanese Journal of Applied Physics

Year:

1996

File:

PDF, 932 KB

1996

35

Mixed Chromium(III)-Ruthenium(III) Trinuclear Complex, [CrRu 2 (μ 3 -O)(μ-CH 3 COO) 6 (pyridine) 3 ] +

Sasaki, Yoichi, Yoshida, Yukihiro, Ohto, Akihiro, Tokiwa, Ayako, Ito, Tasuku, Kobayashi, Hanako, Uryû, Norikiyo, Mogi, Iwao

Journal:

Chemistry Letters

Year:

1993

File:

PDF, 403 KB

1993

36

Structure and Vibrational Spectra of Trinuclear Metal Cluster Complexes. A Question of Symmetry

Ohto, Akihiro, Tokiwa-Yamamoto, Ayako, Abe, Masaaki, Ito, Tasuku, Sasaki, Yoichi, Umakoshi, Keisuke, Cannon, Roderick D.

Journal:

Chemistry Letters

Year:

1995

File:

PDF, 364 KB

1995

37

Far-Infrared Absorption by Small Particles of YBa 2 Cu 3 O 6.74

Kuroda, Noritaka, Chida, Fumio, Sasaki, Yoshiro, Nishina, Yuichiro, Kikuchi, Masae, Tokiwa, Ayako, Syono, Yasuhiko

Journal:

Journal of the Physical Society of Japan

Year:

1987

File:

PDF, 581 KB

1987

38

Cu NMR Study of Bilayer HgBa 2 CaCu 2 O 6 + δ –Variation of Pseudo Spin-Gap Spectrum

Itoh, Yutaka, Tokiwa-Yamamoto, Ayako, Machi, Takato, Tanabe, Keiichi

Journal:

Journal of the Physical Society of Japan

Year:

1998

Language:

english

File:

PDF, 220 KB

english, 1998

39

Crystal chemistry of oxide superconductors - Synthesis and properties of (Y,La,Ba)3Cu3Oy pseudo-ternary system.

Tokiwa, Ayako, Kikuchi, Masae, Syono, Yasuhiko, Nakatsu, Osamu, Kobayashi, Norio, Muto, Yoshio

Journal:

Journal of the Japan Society of Powder and Powder Metallurgy

Year:

1987

File:

PDF, 157 KB

1987