• 3801 Citations
  • 36 h-Index
1987 …2020

Research output per year

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Research Output

2002

Effects of Zn substitution on the superconductivity and pseudogap in HgBa2CuO4+δ with various doping levels

Yamamoto, A., Minami, K., Hu, W. Z., Miyakita, A., Izumi, M. & Tajima, S., 2002 Mar 1, In : Physical Review B - Condensed Matter and Materials Physics. 65, 10, p. 1045051-1045057 7 p., 104505.

Research output: Contribution to journalArticle

34 Citations (Scopus)

Electron density distribution in a single crystal of (formula presented) (formula presented)

Mori, H., Lee, S., Yamamoto, A., Tajima, S. & Sato, S., 2002 Jan 1, In : Physical Review B - Condensed Matter and Materials Physics. 65, 9, p. 1-4 4 p.

Research output: Contribution to journalArticle

Electron density distribution in a single crystal of Mg1-xB2 [x=0.045(5)]

Mori, H., Lee, S., Yamamoto, A., Tajima, S. & Sato, S., 2002 Mar 1, In : Physical Review B - Condensed Matter and Materials Physics. 65, 9, p. 925071-925074 4 p., 092507.

Research output: Contribution to journalArticle

32 Citations (Scopus)

Electronic state of MgB2 superconductor

Tajima, S., Masui, T., Uchiyama, H., Quilty, J. W., Eltsev, Y., Lee, S., Yamamoto, A. & Mori, H., 2002 Aug 1, In : Current Applied Physics. 2, 4, p. 315-319 5 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)

Exponential Temperature Dependence of the Penetration Depth in Single Crystal [Formula presented]

Manzano, F., Carrington, A., Hussey, N. E., Lee, S., Yamamoto, A. & Tajima, S., 2002 Jan 1, In : Physical Review Letters. 88, 4, 1 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Exponential temperature dependence of the penetration depth in single crystal MgB2

Manzano, F., Carrington, A., Hussey, N. E., Lee, S., Yamamoto, A. & Tajima, S., 2002 Jan 28, In : Physical Review Letters. 88, 4, p. 470021-470024 4 p., 047002.

Research output: Contribution to journalArticle

153 Citations (Scopus)

High-pressure synthesis of superconducting Nb1-xB2 (x = 0-0.48) with the maximum Tc = 9.2 K

Yamamoto, A., Takao, C., Masui, T., Izumi, M. & Tajima, S., 2002 Dec 15, In : Physica C: Superconductivity and its applications. 383, 3, p. 197-206 10 p.

Research output: Contribution to journalArticle

71 Citations (Scopus)

Kinetic study of (Bi,Pb)2Sr2Ca2Cu3O10+x phase formation in KCl flux

Lee, S., Yamamoto, A. & Tajima, S., 2002 Sep, In : Journal of Materials Research. 17, 9, p. 2281-2285 5 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Magnetization behavior of MgB2 and the effect of high energy heavy-ion irradiation

Chikumoto, N., Yamamoto, A., Konczykowski, M. & Murakami, M., 2002 Oct 1, In : Physica C: Superconductivity and its applications. 378-381, PART 1, p. 466-469 4 p.

Research output: Contribution to journalArticle

23 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

1 Citation (Scopus)

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

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

Research output: Contribution to journalArticle

86 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

Phonon contribution to the transport properties of single-crystal MgB2

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

Research output: Contribution to journalArticle

47 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

5 Citations (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 Oct 1, In : Physica C: Superconductivity and its applications. 378-381, PART 1, p. 33-37 5 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

125 Citations (Scopus)

Transport properties of MgB2 single crystal

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

Research output: Contribution to journalArticle

20 Citations (Scopus)
2001

Effects of metal substitution on superconductivity and crystal structure of HgBa2CuO4+δ

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Extended range of superconducting bismuthates K1-xAxBiO3 (A = La, Bi, and Ca)

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

Research output: Contribution to journalArticle

11 Citations (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 Aug 1, In : Physica C: Superconductivity and its applications. 357-360, SUPPL. 2, p. 341-344 4 p.

Research output: Contribution to journalArticle

18 Citations (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 Aug 1, In : Journal of the Physical Society of Japan. 70, 8, p. 2255-2258 4 p.

Research output: Contribution to journalArticle

221 Citations (Scopus)

MEM-based structure-refinement system REMEDY and its applications

Izumi, F., Kumazawa, S., Ikeda, T., Hu, W. Z., Yamamoto, A. & Oikawa, K., 2001 Jan 1, In : Materials Science Forum. 378-381, I, p. 59-64 6 p.

Research output: Contribution to journalConference article

78 Citations (Scopus)

Nd/Ba substitution and oxygen deficiency effects on the pinning properties of Nd1+xBa2-xCu3O7-δ single crystals

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

Research output: Contribution to journalArticle

3 Citations (Scopus)

Nd/Ba substitution and oxygen deficiency effects on the pinning properties of NdBa2Cu3O7-δ single crystals

Shibata, S., Nakao, K., Yamamoto, A., Feng, Y., Pradhan, A. K., Machi, T. & Koshizuka, N., 2001 Dec 1, In : Materials Research Society Symposium - Proceedings. 659, p. II10.8.1-II10.8.6

Research output: Contribution to journalConference article

Superconducting and structural properties of nearly carbonate-free HgBa2CuO4+δ

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

Research output: Contribution to journalArticle

11 Citations (Scopus)

Thermoelectric power and resistivity of HgBa2CuO4+δ over a wide doping range

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

Research output: Contribution to journalArticle

63 Citations (Scopus)

Zn-substitution effects on superconductivity and pseudogap in HgBa2CuO4+δ over a wide doping range

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

Research output: Contribution to journalArticle

3 Citations (Scopus)
2000

A comparison of the structural evolution induced by changing the hole-doping level in three series (Hg, Tl)-22(n - 1)n (n = 2, 3) samples

Wu, X. J., Tokiwa-Yamamoto, A., Tatsuki, T. & Tanabe, K., 2000 Jul 1, In : Superconductor Science and Technology. 13, 7, p. 1079-1089 11 p.

Research output: Contribution to journalReview article

2 Citations (Scopus)

Crystal structures and resistivities of La1/3LixNbO3

Dilanian, R. A., Yamamoto, A., Izumi, F. & Kamiyama, T., 2000, In : Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals. 341, p. 225-230 6 p.

Research output: Contribution to journalConference article

19 Citations (Scopus)

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

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

Research output: Contribution to journalArticle

9 Citations (Scopus)

Novel techniques of neutron powder diffraction and their applications to superconducting oxides

Izumi, F., Yamamoto, A., Khasanova, N. R., Kumazawa, S., Hu, W. Z. & Kamiyama, T., 2000 Jun, In : Physica C: Superconductivity and its applications. 335, 1, p. 239-244 6 p.

Research output: Contribution to journalConference article

8 Citations (Scopus)

Photoemission study of electronic states in with various doping levels

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Superconductivity at 75 K in Hg-1222 cuprates: (Hg,M)Sr2(Ln,Ce)2Cu2Oz (M = Ti, V, Cr, Mo, W, Re; Ln = Sm-Er)

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

Research output: Contribution to journalArticle

3 Citations (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 Jan 1, In : Journal of Solid State Chemistry. 154, 2, p. 488-497 10 p.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Synthesis and superconductivity of Zn-substituted HgBa2CuO4+δ with various doping levels

Hu, W. Z., Yamamoto, A., Izumi, M. & Tajima, S., 2000 Aug 1, In : Physica C: Superconductivity and its applications. 338, 1, p. 72-75 4 p.

Research output: Contribution to journalConference article

6 Citations (Scopus)

Synthesis of HgBa2Can-1CunO2(n+1)+d (n = 1,2,3) using high-purity BaO

Yamamoto, A., Hu, W. Z. & Tajima, S., 2000 Jun, In : Physica C: Superconductivity and its applications. 335, 1, p. 268-272 5 p.

Research output: Contribution to journalConference article

6 Citations (Scopus)
1999
19 Citations (Scopus)

Crystal Structure of the (K0.87Bi0.13)BiO3Superconductor

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

Research output: Contribution to journalArticle

30 Citations (Scopus)

Effects of Carbonate Defects on the Superconductivity of HgBa2CuO4+δ

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

Research output: Contribution to journalArticle

8 Citations (Scopus)

La-substitution effects on transport properties of APbO3-δ (A = Ba, Sr and Ca)

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

Research output: Contribution to journalArticle

10 Citations (Scopus)

Metal-insulator transition and superconductivity in Sr- and La-substituted BaPb1-xBixO3

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

Research output: Contribution to journalArticle

5 Citations (Scopus)

Study of structural variation caused by Ar annealing for (Hg0.7,Tl0.3)2Ba2(Ca0.2,Y0.8)Cu2Oy

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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Temperature and time dependence of phase formation of HgBa2Can-1CunO2(n+1)+δ superconductors

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

Research output: Contribution to journalArticle

11 Citations (Scopus)
1998

Cu NMR Study of Bilayer HgBa2CaCu2O6+δ. Variation of Pseudo Spin-Gap Spectrum

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

Research output: Contribution to journalArticle

11 Citations (Scopus)

HgBa2CaCu2O6+delta - Variation of pseudo spin-gap spectrum

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

Research output: Contribution to journalArticle

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

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

Research output: Contribution to journalArticle

36 Citations (Scopus)

Synthesis and characterization of perovskite-type CaPbO3

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

Research output: Contribution to journalArticle

3 Citations (Scopus)