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Journal Articles

Structure evolution and corresponding electrical properties in weakly bound Co-C60 mixture

Sakai, Seiji; Naramoto, Hiroshi; Xu, Y.; Priyanto, T. H.; Lavrentiev, V.; Narumi, Kazumasa

Materials Research Society Symposium Proceedings, Vol.788, p.L11.49.1 - L11.49.6, 2004/00

Mixture films between cobalt and C$$_{60}$$ (CoxC$$_{60}$$, x = 0.5-700) were prepared by co-evaporation technique under UHV conditions. The composition-dependent features of dilatation and downshift of Raman peak suggest that the mixtures are composed of cobalt particles and a C$$_{60}$$-based phase in which certain number of cobalt atoms are coordinated with C$$_{60}$$ molecules. It is deduced that the equilibrated number of cobalt atoms in the C$$_{60}$$-based phase is 4 atoms per C$$_{60}$$ molecule and in which an electron transfer occurs from a cobalt atom to a C$$_{60}$$ molecule. The evaluation of their temperature dependences reveals that: (1) The mixtures with x $$leq$$ 4 are thermally activated-type, and their conductive nature can be attributed to the C$$_{60}$$-based phase. Further (2) the mixtures between 4 $$<$$ x $$<$$ 60 are also thermally activated, however, the electron hopping process between the isolated cobalt particles is supposed to be operative (variable-range-hopping). And (3) in the mixtures with x $$geq$$ 60 which corresponds to a percolation threshold for cobalt particles, the system changes into metallic conduction.

Journal Articles

Effect of electron beam irradiation on electrical conductivity of triethylamine-tetracyanoquinodimethane complex

Tamada, Masao; Asano, Masaharu; Yoshida, Masaru; Kumakura, Minoru

Radiation Physics and Chemistry, 36(6), p.866 - 867, 1990/00

no abstracts in English

Journal Articles

Electrical conductivity of oxygen deficient urania-yttria solid solutions

; ; ;

Journal of Nuclear Materials, 151, p.90 - 94, 1987/00

 Times Cited Count:3 Percentile:24.34(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Temperature limitation of partially stabilized zirconia for the application of electrical insulators

; ; ; Katano, Y.; Katsuta, Hiroji

Journal of Nuclear Materials, 141-143, p.392 - 395, 1986/00

 Times Cited Count:3 Percentile:58.29(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Comments on transport phenomena of ionic liquids

; Furukawa, Kazuo

First Inter.Symp.on Molten Salt Chem.Technol.,J-315, p.449 - 452, 1983/00

no abstracts in English

Journal Articles

Electrical conductivity study on photoinduced ionic polymerization of $$alpha$$-methylstyrene

; *; *

Polym.J., 3(6), p.762 - 763, 1972/06

 Times Cited Count:6

no abstracts in English

Journal Articles

Journal Articles

Charge scavenging in non-polar liquid studied by electrical conductivity measurement

; *; *; *

Radiat.Eff., 1, p.109 - 116, 1969/00

no abstracts in English

Journal Articles

Charge Scavenging in Non-polar Liquid Studied by Electrical Conductivity Measurement

; *; *; *

Radiation Effects, 1, p.109 - 116, 1969/00

no abstracts in English

Journal Articles

The Estimation of free ion life time by pulse electrical conductivity measurement

; ; *; *; *

Bulletin of the Chemical Society of Japan, 41(5), p.1261 - 1263, 1968/00

 Times Cited Count:7

no abstracts in English

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