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Nakata, Yoshiyuki*; Hara, Naoyuki*; Hirotsu, Yoshihiko*; Emura, Shuichi*; Makino, Akihiro*; Uruga, Tomoya*; Harada, Makoto*; Nishihata, Yasuo; Yoneda, Yasuhiro; Kubozono, Yoshihiro*
Japanese Journal of Applied Physics, 38(Suppl.38-1), p.404 - 407, 1999/06
The EXAFS spectra on Zr K-edge are investigated for as-formed Fe-7at%Zr-3at%B amorphous alloys and annealed ones at 693 K and 773 K for an hour in order to reveal local structural changes due to annealing. The analysis shows that the atomic distances of Fe-Zr and Zr-Zr pairs increase during annealing and approach those in a Fe3Zr or/and Fe2Zr metallic comound. The change in the atomic distances suggests that medium range ordered clusters should be formed during annealing.
Toda, Naohiro*; Katayama, Yoshinori; Tsuji, Kazuhiko*
Review of High Pressure Science and Technology, 7, p.647 - 649, 1998/03
The electrical conductivity has been measured at pressures to 8 GPa and temperatures of 77-300K in evaporated amorphous Ge (a-Ge), a-Ge-Cu alloys and a-Ge-Al alloys. The dependence of is well described by a power lw at low temperatures below 150 K, which is expemcted from a multi-phonon tunneling transition process model with weak electron-lattice coupling, rather than the Mott's variable range hopping conduction model. The exponent in the power law changes with increasing pressure. For both a-GeCu and a-GeAl alloys, d(ln )/d show positive values in the low pressure region and negative values in the high pressure region. Results are discussed from several hopping conduction models.
;
Radiat.Eff.Lett., 86, p.43 - 46, 1985/00
no abstracts in English
; ; ; ; Furukawa, Kazuo
Journal of Nuclear Materials, 79(2), p.430 - 431, 1979/00
Times Cited Count:14no abstracts in English
; ; ; Furukawa, Kazuo
Phys.Status Solidi A, 51(2), p.325 - 332, 1979/00
Times Cited Count:3no abstracts in English
; ;
Applied Physics Letters, 31(7), p.421 - 422, 1977/07
Times Cited Count:22no abstracts in English