２０００年　研究業績

原著論文・解説記事

1. Y. Moritomo, Sh. Xu, A. Machida, T. Akimoto, E. Nishibori, M. Takata and M. Sakata, “Electronic structure of double-perovskite transition metal oxides”, Phys. Rev. B62, R7827 - R7830 (2000)
2. Y. Moritomo, H. Kusuya, T. Akimoto, A. Machida, ”Room-temperature magnetoresistance in Fe-site-substituted Sr₂FeMoO₆”, Jpn. J. Appl.Phys., 39, L360 - L362 (2000)
   
3. Y. Moritomo, Sh. Xu, A. Machida, T. Akimoto, E. Nishibori, M. Takata, M. Sakata and K. Ohoyama, “Crystal and magnetic structure of conducting double perovskite Sr₂FeMoO₆”, J. Phys. Soc. Jpn., 69, 1723 - 1726 (2000)
4. Y. Moritomo, Sh. Xu, T. Akimoto, A. Machida, N, Hamada, K. Ohoyama, E. Nishibori, M. Takata and M. Sakata, “Electron doping effects in conducting Sr₂FeMoO₆”, Phys. Rev. B62, 14224 - 14228 (2000)
5. Y. Moritomo, K. Hirota, N. Nakao, T. Kiyama, Y. Murakami, S. Okamoto, S. Ishihara, S. Maekawa, M. Kubota and H. Yoshizawa, “Pressure-induced insulator-metal transition in a bilayer manganites: Pressure control of orbital stability”, Phys. Rev. B62, 17 - 20 (2000)
6. Y. Moritomo, T. Akimoto, M. Takeo, E. Nishibori, M. Takata and M. Sakata, K. Ohoyama and A. Nakamura, “Metal-insulator transition induced by a spin-state transition in TbBaCo₂O_5+δ (δ = 0.5)”, Phys. Rev. B61, R13325 - R13328 (2000)
7. X. J. Liu, A. Machida, Y. Moritomo, M. Ichida and A. Nakamura, “Room-temperature photoswitching in La_0.6Sr_0.4MnO₃ film”, Jpn. J. Appl. Phys., 39, L670 - L672 (2000)
8. X. J. Liu, Y. Moritomo, A. Nakamura and H. Asano, “Photoinduced resistivity change due to spin-disorder in a manganite film”, Jpn. J. Appl. Phys., 39, L1223 - L1225 (2000)
9. X. J. Liu, Y. Moritomo, M. Ichida, A. Nakamura and N.Kojima, “Photoinduced phase transition in a mixed-valence gold complex”, Phys. Rev. B61, 20-23 (2000)
10. X. J. Liu, Y. Moritomo, A. Nakamura, S. Matsuba and N. Kojima, “Pressure-induced phase transition in quasi-1D mixed valence gold complex”, J. Phys. Soc. Jpn., 69, 3158 - 3161 (2000)
11. X. J. Liu, Y. Moritomo, A. Nakamura, S. Matsuba and N. Kojima, “Critical nucleation in the phototransferd metastable phase of Cs₂Au₂Br₆”, J. Phys. Soc. Jpn., 69, 1267 - 1270 (2000)
12. A. Machida, Y. Moritomo, E. Nishibori, M. Takata and M. Sakata, K. Ohoyama, S. Mori, N. Yamamoto and A. Nakamura, “Phase separation and insulator-metal behavior of doped manganites”, Phys. Rev. B62, 3882 - 3887 (2000)
13. A. Machida, Y. Moritomo, E. Nishibori, M. Takata and M. Sakata, K. Ohoyama, S. Mori, N. Yamamoto and A. Nakamura, “Microdomain structure of Cr-doped manganites: Nd_1/2Ca_1/2(Mn,Cr)O₃”, J. Phys. Soc. Jpn., 69, 3536 - 3539 (2000)
14. A. Machida, Y. Moritomo, K. Ohoyama, S. Okamoto, S. Ishihara, S. Maekawa and A. Nakamura, “Reconsideration of the lattice effect on the charge-ordering transition in doped manganites”, Phys. Rev. B62, 80 - 83 (2000)
15. T. Akimoto, Y. Moritomo, K. Ohoyama, S. Okamoto, S. Ishihara, S. Maekawa, K. Hirota and A. Nakamura, “Orbital stability in the spin-ordered phase of bilayer manganites as investigated by neutron diffraction measurements”, Phys. Rev. B61, 11270 - 11273 (2000)
16. T. Akimoto, Y. Moritomo, A. Nakamura and N. Furukawa, “Observation of anomalous single-magnon scattering in half-metallic ferromagnets by chemical pressure control”, Phys. Rev. Lett.85, 3914 - 3917 (2000)
17. R. Yamamoto, Y. Moritomo and A. Nakamura, “Electronic structure of half-metallic CrO₂ as investigated by optical spectroscopy”, Phys. Rev. B61, R5062 - R5065 (2000)
18. T. Saitoh, D. S. Dessau, Y. Moritomo, T. Kimura, Y. Tokura, N. Hamada, “Temperature-dependent pseudogaps in colossal magnetoresistive oxides”, Phys. Rev. B62, 1039 - 1043 (2000)
19. J. H. Jung, J. S. Ahn, J. Yu, T. W. Noh, J. Lee, Y. Moritomo, I. Solovyev and K. Terakura, “Optical investigations of charge gap in orbital-ordered La_1/2Sr_3/2MnO₄”, Phys. Rev. B61, 6902 - 6906 (2000)
20. J. H. Jung, J. S. Ahn, J. Yu, T. W. Noh, E. J. Choi and Y. Moritomo, “Dimensional crossover driven by magnetic ordering in optical conductivity of Pr_1/2Sr_1/2MnO₂”, Phys. Rev. B61, 14656 - 14659 (2000)
21. J. H. Jung, H. J. Lee, T. W. Noh, E. J. Choi, Y. Moritomo and Y. J. Wang and X. Wei, “Melting of charge/orbital ordered states in Nd_1/2Sr_1/2MnO₃: Temperature and magnetic-field-dependent optical study” ,Phys. Rev. B62, 481 - 487 (2000)
22. J. H. Jung, H. J. Lee, T. W. Noh, Y. Moritomo, Y. J. Wang and X. Wei, Magnetic-field-dependent optical studies of layered antiferromagnet Pr_1/2Sr_1/2MnO₃”, Phys. Rev. B62, 8634 - 8637 (2000)
23.  M. Kubota, Y. Oohora, H. Yoshizawa, H. Fujioka, K. Shimizu, K. Hirota, Y. Moritomo and Y. Endo, “Influence of quasi-bi-stripe charge order on resistivity and magnetism in the bilayer manganite La_2-2xSr_1+2xMn₂O₇”, J. Phys. Soc. Jpn., 69, 1986 - 1989 (2000)
24. M. Kubota, H. Fujioka, K. Hirota, K. Ohoyama, Y. Moritomo, H. Yoshizawa and Y. Endo, “Relation between crystal and magnetic structures of layered manganite La_2-2xSr_1+2xMn₂O₇  (0.30 < x < 0.50)”, J. Phys. Soc. Jpn., 69, 1606 - 1609 (2000)
25. Y. Wakabayashi, Y. Murakami, I. Koyama, T. Kimura, Y. Tokura, Y. Moritomo, K. Hirota and Y. Endo, “Orbital and charge ordering in  LaSr₂Mn₂O₇ observed by resonant x-ray scattering”, J. Phys. Soc. Jpn., 69, 2731 - 2734 (2000)
26. I. A. Zaliznyak, J. P. Hill, J. M. Tranquada, R. Erwin and Y. Moritomo, “Independent freezing of charge and spin dynamics in La_1.5Sr_0.5CoO₄”, Phys. Rev. Lett.85, 4353 - 4356 (2000)
27. M. Arao, K. Koyama, Y. Inoue and Y. Moritomo, “Feature of the rhombohedral-to-orthorhombic structural phase transition in La_1+xSr_xMnO₃”, Phys. Rev. B62, 5399 - 5405 (2000)
28. J. Park, S. Lee, J.-G. Park, I. P. Swainson, Y. Moritomo, H.-C. Ri, “Spin-glass state of (Nd,La) _0.5Sr_1.5MnO₄”, Phys. Rev. B62, 13848 - 13851 (2000)
29. M. Tokunaga, N. Miura and Y. Moritomo, "Colossal magnetoresistance in layered manganites (La,Nd)1/2Sr3/2MnO4", Physica B284-288, 1990-1991 (2000)
30. A. Machida, M. Itoh, Y. Moritomo, S. Mori, N. Yamamoto, K. Ohoyama and A. Nakamura"Electronic phase diagram in bandwidth controlled manganites"
    , Physica B281-282, 524-525 (2000)
31. R. Yamamoto, A. Machida, Y. Moritomo and A. Nakamura, "Electronic structure of half-metallic materilas: comparison of pyrite with doped manganites", Physica B281-282, 705-706 (2000).
32. X. J. Liu, Y. Moritomo, M. Ichida, A. Nakamura and N. Kojima, "Pressure- and photo-induced phase transition in gold complex", J. Lumi 87-89, 649-651 (2000).
33. 守友　浩「四角酸などの有機酸の水素結合と誘電特性」高圧力の科学と技術、10、33 - 41 (2000)