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Journal Articles

EXAFS study on local structural changes in amorphous Fe-Zr-B alloys

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.

Journal Articles

Effect of pressure on hopping conduction in amorphous Ge alloys

Toda, Naohiro*; Katayama, Yoshinori; Tsuji, Kazuhiko*

Review of High Pressure Science and Technology, 7, p.647 - 649, 1998/03

http://ci.nii.ac.jp/naid/10002691304

The electrical conductivity $$sigma$$ has been measured at pressures $$P$$ to 8 GPa and temperatures $$T$$ of 77-300K in evaporated amorphous Ge (a-Ge), a-Ge-Cu alloys and a-Ge-Al alloys. The $$T$$ dependence of $$sigma$$ 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 $$n$$ in the power law changes with increasing pressure. For both a-Ge$$_{1-x}$$Cu$$_{x}$$ and a-Ge$$_{1-x}$$Al$$_{x}$$ alloys, d(ln $$n$$)/d$$P$$ show positive values in the low pressure region and negative values in the high pressure region. Results are discussed from several hopping conduction models.

Journal Articles

Recovery of electrical resistivity in amorphous PdSi alloys after low temperature neutron irradiation

; *

Radiat.Eff.Lett., 86, p.43 - 46, 1985/00

no abstracts in English

Journal Articles

Irradiation effects of helium ions on the structure of amorphous Pd$$_{0}$$$$_{.}$$$$_{8}$$Si$$_{0}$$$$_{.}$$$$_{2}$$ alloy

*; ; *; *; Furukawa, Kazuo

Journal of Nuclear Materials, 79(2), p.430 - 431, 1979/00

https://doi.org/10.1016/0022-3115(79)90113-2
 Times Cited Count：14

no abstracts in English

Journal Articles

Structural analysis of amorphous Pd$$_{0}$$$$_{.}$$$$_{8}$$Si$$_{0}$$$$_{.}$$$$_{2}$$ alloy by the dense random packing model of differently sized compressible spheres

*; ; *; Furukawa, Kazuo

Phys.Status Solidi A, 51(2), p.325 - 332, 1979/00

https://doi.org/10.1002/pssa.2210510202
 Times Cited Count：3

no abstracts in English

Journal Articles

Structural changes in amorphous Pd$$_{8}$$$$_{0}$$Si$$_{2}$$$$_{0}$$ by neutron irradiation

; *; *

Applied Physics Letters, 31(7), p.421 - 422, 1977/07

https://doi.org/10.1063/1.89731
 Times Cited Count：22

no abstracts in English

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