Ayako Yamamoto

2002

Peak Effect in Single Crystal [Formula presented] Superconductor for [Formula presented]-Axis

Pissas, M., Lee, S., Yamamoto, A. & Tajima, S., 2002 1 1, ： : Physical Review Letters. 89, 9

研究成果: Article

Peak effect in single crystal MgB₂ superconductor for H ∥ c-axis

Pissas, M., Lee, S., Yamamoto, A. & Tajima, S., 2002 8 26, ： : Physical Review Letters. 89, 9, p. 970021-970024 4 p., 097002.

研究成果: Article

86 引用（Scopus）

Phonon contribution to the transport properties of single-crystal (formula presented)

Masui, T., Yoshida, K., Lee, S., Yamamoto, A. & Tajima, S., 2002, ： : Physical Review B - Condensed Matter and Materials Physics. 65, 21, p. 1-4 4 p.

研究成果: Article

Phonon contribution to the transport properties of single-crystal MgB₂

Masui, T., Yoshida, K., Lee, S., Yamamoto, A. & Tajima, S., 2002 6 1, ： : Physical Review B - Condensed Matter and Materials Physics. 65, 21, p. 2145131-2145134 4 p., 214513.

研究成果: Article

47 引用（Scopus）

Raman scattering measurement of the superconducting gap character in MgB₂ single crystals

Quilty, J. W., Lee, S., Yamamoto, A. & Tajima, S., 2002 10 1, ： : Physica C: Superconductivity and its applications. 378-381, PART 1, p. 38-42 5 p.

研究成果: Article

5 引用（Scopus）

Single crystals of MgB₂ superconductor grown under high-pressure in Mg-B-N system

Lee, S., Yamamoto, A., Mori, H., Eltsev, Y., Masui, T. & Tajima, S., 2002 10 1, ： : Physica C: Superconductivity and its applications. 378-381, PART 1, p. 33-37 5 p.

研究成果: Article

12 引用（Scopus）

Superconducting Gap in [Formula presented]: Electronic Raman Scattering Measurements of Single Crystals

Quilty, J. W., Lee, S., Yamamoto, A. & Tajima, S., 2002 1 1, ： : Physical Review Letters. 88, 8, 1 p.

研究成果: Article

2 引用（Scopus）

Superconducting gap in MgB₂: Electronic raman scattering measurements of single crystals

Quilty, J. W., Lee, S., Yamamoto, A. & Tajima, S., 2002 2 25, ： : Physical Review Letters. 88, 8, p. 087001/1-087001/4

研究成果: Article

125 引用（Scopus）

Transport properties of MgB₂ single crystal

Masui, T., Lee, S., Yamamoto, A. & Tajima, S., 2002 10 1, ： : Physica C: Superconductivity and its applications. 378-381, PART 1, p. 216-219 4 p.

研究成果: Article

20 引用（Scopus）

2001

Effects of metal substitution on superconductivity and crystal structure of HgBa₂CuO_4+δ

Hu, W. Z., Yamamoto, A., Izumi, M. & Tajima, S., 2001 1 7, ： : Physica C: Superconductivity and its applications. 356, 1-2, p. 141-148 8 p.

研究成果: Article

2 引用（Scopus）

Extended range of superconducting bismuthates K_1-xA_xBiO₃ (A = La, Bi, and Ca)

Khasanova, N. R., Yoshida, K., Yamamoto, A. & Tajima, S., 2001 1 7, ： : Physica C: Superconductivity and its applications. 356, 1-2, p. 12-22 11 p.

研究成果: Article

11 引用（Scopus）

Fast synthesis and single crystal growth of Pb-free and Pb-doped Bi-2223 superconductors using alkali chlorides flux technique

Lee, S., Yamamoto, A. & Tajima, S., 2001 8 1, ： : Physica C: Superconductivity and its applications. 357-360, SUPPL. 2, p. 341-344 4 p.

研究成果: Article

18 引用（Scopus）

Growth, structure analysis and anisotropic superconducting properties of MgB₂ single crystals

Lee, S., Mori, H., Masui, T., Eltsev, Y., Yamamoto, A. & Tajima, S., 2001 8 1, ： : Journal of the Physical Society of Japan. 70, 8, p. 2255-2258 4 p.

研究成果: Article

221 引用（Scopus）

Nd/Ba substitution and oxygen deficiency effects on the pinning properties of Nd_1+xBa_2-xCu₃O_7-δ single crystals

Shibata, S., Yamamoto, A., Feng, Y., Pradhan, A. K., Machi, T. & Koshizuka, N., 2001 8 1, ： : Physica C: Superconductivity and its applications. 357-360, SUPPL. 2, p. 523-526 4 p.

研究成果: Article

3 引用（Scopus）

Superconducting and structural properties of nearly carbonate-free HgBa₂CuO_4+δ

Yamamoto, A., Hu, W. Z., Izumi, F. & Tajima, S., 2001 4 15, ： : Physica C: Superconductivity and its applications. 351, 4, p. 329-340 12 p.

研究成果: Article

11 引用（Scopus）

Thermoelectric power and resistivity of HgBa₂CuO_4+δ over a wide doping range

Yamamoto, A., Hu, W. Z. & Tajima, S., 2001 12 14, ： : Physical Review B - Condensed Matter and Materials Physics. 63, 2

研究成果: Article

63 引用（Scopus）

Zn-substitution effects on superconductivity and pseudogap in HgBa₂CuO_4+δ over a wide doping range

Yamamoto, A., Minami, K., Hu, W. Z., Izumi, M. & Tajima, S., 2001 8, ： : Physica C: Superconductivity and its applications. 357-360, p. 34-38 5 p.

研究成果: Article

3 引用（Scopus）

2000

Low temperature fluorination of (Sr,Ba)₂CuO₃ using NH₄F

Adachi, S., Tatsuki, T., Sugano, T., Tokiwa-Yamamoto, A. & Tanabe, K., 2000 6 1, ： : Physica C: Superconductivity and its applications. 334, 1, p. 87-94 8 p.

研究成果: Article

9 引用（Scopus）

Photoemission study of electronic states in with various doping levels

Uchiyama, H., Hu, W., Yamamoto, A., Tajima, S., Saiki, K. & Koma, A., 2000 1 1, ： : Physical Review B - Condensed Matter and Materials Physics. 62, 1, p. 615-621 7 p.

研究成果: Article

5 引用（Scopus）

Superconductivity at 75 K in Hg-1222 cuprates: (Hg,M)Sr₂(Ln,Ce)₂Cu₂O_z (M = Ti, V, Cr, Mo, W, Re; Ln = Sm-Er)

Kandyel, E., Yamamoto, A. & Tajima, S., 2000 1 1, ： : Physica C: Superconductivity and its applications. 341-348, PART 1, p. 429-432 4 p.

研究成果: Article

3 引用（Scopus）

Synthesis and study of Hg-based 1222-type superconducting cuprates (Hg, M)Sr₂(Ln, Ce)₂Cu₂O(z)

Kandyel, E., Yamamoto, A., Wen, J. G. & Tajima, S., 2000 1 1, ： : Journal of Solid State Chemistry. 154, 2, p. 488-497 10 p.

研究成果: Article

2 引用（Scopus）

1999

Crystal structure and its role in electrical properties of the perovskite CaPbO₃ synthesized at high pressure

Yamamoto, A., 1999 1 1, ： : Chemistry of Materials. 11, 3, p. 747-753 7 p.

研究成果: Article

19 引用（Scopus）

Crystal Structure of the (K_0.87Bi_0.13)BiO₃Superconductor

Khasanova, N. R., Izumi, F., Kamiyama, T., Yoshida, K., Yamamoto, A. & Tajima, S., 1999 4 1, ： : Journal of Solid State Chemistry. 144, 1, p. 205-208 4 p.

研究成果: Article

30 引用（Scopus）

Effects of Carbonate Defects on the Superconductivity of HgBa₂CuO_4+δ

Yamamoto, A., Hu, W. Z., Izumi, F., Kamiyama, T. & Tajima, S., 1999, ： : Journal of Low Temperature Physics. 117, 3-4, p. 789-793 5 p.

研究成果: Article

8 引用（Scopus）

La-substitution effects on transport properties of APbO_3-δ (A = Ba, Sr and Ca)

Yamamoto, A., Ono, T., Tatsuki, T., Tamura, T. & Tajima, S., 1999 1 1, ： : Materials Research Bulletin. 34, 12, p. 1935-1942 8 p.

研究成果: Article

10 引用（Scopus）

Metal-insulator transition and superconductivity in Sr- and La-substituted BaPb_1-xBi_xO₃

Yamamoto, A., Furumochi, T. & Tajima, S., 1999 12 1, ： : Physica C: Superconductivity and its applications. 328, 1, p. 118-124 7 p.

研究成果: Article

5 引用（Scopus）

Study of structural variation caused by Ar annealing for (Hg_0.7,Tl_0.3)₂Ba₂(Ca_0.2,Y_0.8)Cu₂O_y

Wu, X. J., Tokiwa-Yamamoto, A., Tatsuki, T., Adachi, S. & Tanabe, K., 1999 3 20, ： : Physica C: Superconductivity and its applications. 314, 3, p. 219-227 9 p.

研究成果: Article

6 引用（Scopus）

Temperature and time dependence of phase formation of HgBa₂Ca_n-1Cu_nO₂(n+1)+δ superconductors

Yamamoto, A., Itoh, M., Fukuoka, A., Adachi, S., Yamauchi, H. & Tanabe, K., 1999 3, ： : Journal of Materials Research. 14, 3, p. 644-651 8 p.

研究成果: Article

11 引用（Scopus）

1998

Cu NMR Study of Bilayer HgBa₂CaCu₂O_6+δ. Variation of Pseudo Spin-Gap Spectrum

Itoh, Y., Tokiwa-Yamamoto, A., Machi, T. & Tanabe, K., 1998 1 1, ： : Journal of the Physical Society of Japan. 67, 7, p. 2212-2214 3 p.

研究成果: Article

11 引用（Scopus）

HgBa2CaCu2O6+delta - Variation of pseudo spin-gap spectrum

Yamamoto, A., Itoh, Y. & Machi, T., 1998, ： : Journal of the Physical Society of Japan.

研究成果: Article

Superconductivity at 10.2 K in the K-Bi-O system

Khasanova, N. R., Yamamoto, A., Tajima, S., Wu, X. J. & Tanabe, K., 1998 9 1, ： : Physica C: Superconductivity and its applications. 305, 3-4, p. 275-280 6 p.

研究成果: Article

35 引用（Scopus）

Synthesis and characterization of perovskite-type CaPbO₃

Yamamoto, A., Khasanova, N., Wu, X. J. & Tanabe, K., 1998 5 1, ： : Solid State Ionics. 108, 1-4, p. 333-336 4 p.

研究成果: Article

3 引用（Scopus）

XPS and XANES study on Pb₂Sr₂YCu₃O_8+δ and PbBaSr(YCa)Cu₃O_7+δ

Nagoshi, M., Tokiwa-Yamamoto, A., Syono, Y., Fukuda, Y. & Tachiki, M., 1998 3 1, ： : Journal of Electron Spectroscopy and Related Phenomena. 88-91, p. 503-507 5 p.

研究成果: Article

2 引用（Scopus）

1997

A new Hg-based homologous series of cuprate superconductors; (Hg,Tl)-22(n-1)n (n=1-5)

Tokiwa-Yamamoto, A., Tatsuki, T., Wu, X. J., Adachi, S. & Tanabe, K., 1997 8, ： : Physica C: Superconductivity and its applications. 282-287, PART 2, p. 887-888 2 p.

研究成果: Article

2 引用（Scopus）

Annealing study on (Hg,Tl) ₂Ba₂Ca_n-1Cu_nO_y (n = 1-5) superconductors

Tatsuki, T., Tokiwa-Yamamoto, A., Tamura, T., Adachi, S. & Tanabe, K., 1997 5 1, ： : Physica C: Superconductivity and its applications. 278, 3-4, p. 160-168 9 p.

研究成果: Article

11 引用（Scopus）

Crystal structure of (Hg_0.7Tl_0.3)₂Ba₂(Y _0.8Ca_0.2)Cu₂O_8-δ synthesized at high pressure

Ohta, T., Tokiwa-Yamamoto, A., Izumi, F., Hewat, A. W. & Tanabe, K., 1997 8, ： : Physica C: Superconductivity and its applications. 282-287, PART 2, p. 911-912 2 p.

研究成果: Article

Dependence of and transport properties on the Cu valence (n=2,3) superconductors

Fukuoka, A., Tokiwa-Yamamoto, A., Itoh, M., Usami, R., Adachi, S. & Tanabe, K., 1997 1 1, ： : Physical Review B - Condensed Matter and Materials Physics. 55, 10, p. 6612-6620 9 p.

研究成果: Article

75 引用（Scopus）

High pressure synthesis of HgBa₂Ca₂Cu₃O_y without a precursor

Moriwaki, Y., Tatsuki, T., Tokiwa-Yamamoto, A., Tamura, T., Adachi, S. & Tanabe, K., 1997 1 1, ： : Journal of Materials Science Letters. 16, 2, p. 115-116 2 p.

研究成果: Article

12 引用（Scopus）

Oxygen configuration and disordering in the superconductor (Hg_0.7Tl_0.3)₂Ba₂(Y _0.8Ca_0.2)Cu₂O_8+δ

Ohta, T., Izumi, F., Tokiwa-Yamamoto, A., Tanabe, K. & Hewat, A. W., 1997 8 1, ： : Physica C: Superconductivity and its applications. 281, 2-3, p. 228-236 9 p.

研究成果: Article

4 引用（Scopus）

Shock-loading effects on superconductivity of HgBa₂CuO_y

Tokiwa-Yamamoto, A., Adachi, S., Kikuchi, M., Fukuoka, A., Tanabe, K. & Syono, Y., 1997 11 15, ： : Physica C: Superconductivity and its applications. 291, 1-2, p. 90-96 7 p.

研究成果: Article

3 引用（Scopus）

Structural study on the (Hg,Tl)-Ba-(Ca,Y)-Cu-O system by XRD and TEM

Wu, X. J., Tokiwa-Yamamoto, A., Tatsuki, T., Adachi, S. & Tanabe, K., 1997 8, ： : Physica C: Superconductivity and its applications. 282-287, PART 2, p. 889-890 2 p.

研究成果: Article

Structure evolution in superconducting (Hg_0.7,Tl_0.3)₂Ba₂(Ca _x,Y_1-x)Cu₂O_8-2δ

Wu, X. J., Tokiwa-Yamamoto, A., Tatsuki, T., Adachi, S. & Tanabe, K., 1997 1 1, ： : Physica C: Superconductivity and its applications. 273, 3-4, p. 198-204 7 p.

研究成果: Article

9 引用（Scopus）

Superconducting properties of homologous layered cuprates synthesized under high pressure

Tanabe, K., Tatsuki, T., Tokiwa-Yamamoto, A., Tamura, T., Wu, X. J. & Adachi, S., 1997 8, ： : Physica C: Superconductivity and its applications. 282-287, PART 1, p. 45-48 4 p.

研究成果: Article

1 引用（Scopus）

Synthesis and superconducting properties of fluorinated La₂CuO₄ using NH₄F

Adachi, S., Wu, X. J., Tamura, T., Tatsuki, T., Tokiwa-Yamamoto, A. & Tanabe, K., 1997 11 15, ： : Physica C: Superconductivity and its applications. 291, 1-2, p. 59-66 8 p.

研究成果: Article

9 引用（Scopus）

Transmission electron microscopy study of new intergrowth phases in Hg-Tl-Ba-Ca-Cu-O compounds

Wu, X. J., Tokiwa-Yamamoto, A., Tatsuki, T., Adachi, S. & Tanabe, K., 1997 2 20, ： : Physica C: Superconductivity and its applications. 275, 3-4, p. 179-192 14 p.

研究成果: Article

3 引用（Scopus）

1996

A new oxychloride, Ba₂CuO₂Cl₂, prepared under high pressure

Tatsuki, T., Tokiwa-Yamamoto, A., Tamura, T., Moriwaki, Y., Wu, X. J., Adachi, S. & Tanabe, K., 1996 7 10, ： : Physica C: Superconductivity and its applications. 265, 3-4, p. 323-327 5 p.

研究成果: Article

8 引用（Scopus）

Dependence of superconducting properties on the Cu-valence determined by iodometry in HgBa₂CuO_4+δ

Fukuoka, A., Tokiwa-Yamamoto, A., Itoh, M., Usami, R., Adachi, S., Yamauchi, H. & Tanabe, K., 1996 7 1, ： : Physica C: Superconductivity and its applications. 265, 1-2, p. 13-18 6 p.

研究成果: Article

54 引用（Scopus）

Effect of Tl doping on the phase stability of Hg₂Ba₂(Y,Ca)₁Cu₂O _8-δ superconductors prepared by a high-pressure technique

Tokiwa-Yamamoto, A., Tatsuki, T., Wu, X. J., Adachi, S. & Tanabe, K., 1996 3 1, ： : Physica C: Superconductivity and its applications. 259, 1-2, p. 36-42 7 p.

研究成果: Article

27 引用（Scopus）

High pressure syntheses of copper oxychlorides with K₂NiF₄-type and related structures

Adachi, S., Tatsuki, T., Jin, C. Q., Wu, X. J., Tokiwa-Yamamoto, A., Tamura, T., Moriwaki, Y. & Tanabe, K., 1996 1 1, ： : Journal of Low Temperature Physics. 105, 5-6, p. 1505-1510 6 p.

研究成果: Article

1 引用（Scopus）

High-pressure synthesis of a new homologous series of superconductors, (Hg_1-xTl_x)₂Ba₂Ca _n-1Cu_nO_y (0.3 ≤ x ≤ 0.6, n=3,4)

Tatsuki, T., Tokiwa-Yamamoto, A., Tamura, T., Wu, X. J., Moriwaki, Y., Adachi, S. & Tanabe, K., 1996 1 1, ： : Journal of Low Temperature Physics. 105, 5-6, p. 1559-1564 6 p.

研究成果: Article

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