Temperature Dependence of Electroresistivity, Negative and Positive Magnetoresistivity of Graphite/Diamond Nanocomposites and Onion-Like Carbon Full article
Conference |
2001 MRS Fall Meeting & Exhibition, Symposia U/V – Nanophase and Nanocomposite Materials IV 25-30 Nov 2001 , Boston, Massachusetts |
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Source | Nanophase and nanocomposite materials IV : symposium held November 26-29, 2001, Boston, Massachusetts, U.S.A. Compilation, Materials Research Society. Warrendale, Pennsylvania.2002. ISBN 1558996397. |
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Journal |
MRS Online Proceedings Library
ISSN: 1946-4274 |
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Output data | Year: 2001, Volume: 703, Article number : 619, Pages count : 6 DOI: 10.1557/PROC-703-V6.19 | ||||||
Authors |
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Affiliations |
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Funding (4)
1 | Civilian Research and Development Foundation | REC-008 |
2 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 97-1700 |
3 | Russian Foundation for Basic Research | 00-02-17987 |
4 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 01-237 |
Abstract:
Here we present the result of measurements of electrical resistivity and magnetoresistivity of graphite/diamond nanocomposites (GDNC) and onion-like carbon (OLC) prepared by vacuum annealing of nanodiamond (ND) at various fixed temperatures. GDNC contain particles with a diamond core covered by closed curved graphitic shells. The electrical resistivity of annealed ND is characteristic of systems with localized electrons and can be described in terms of variable hopping-length hopping conductivity (VHLHC). The magnetoresistivity of OLC is negative in the range of field 0<B<2 T, and is positive at B>2 T. The conduction carrier concentration for OLC samples was estimated in the framework of the theory of negative magnetoresistance in semiconductors in the hopping conduction region. The free path length for conducting electrons at liquid helium temperature was estimated from the data on positive magnetoresistivity. The localization length of current carriers was also estimated. The determined parameters are in agreement with proposed structure model of OLC constructed using HRTEM data.
Cite:
Romanenko A.I.
, Anikeeva O.B.
, Okotrub A.V.
, Kuznetsov V.L.
, Butenko Y.V.
, Chuvilin A.L.
, Dong C.
, Ni Y.
Temperature Dependence of Electroresistivity, Negative and Positive Magnetoresistivity of Graphite/Diamond Nanocomposites and Onion-Like Carbon
In compilation Nanophase and nanocomposite materials IV : symposium held November 26-29, 2001, Boston, Massachusetts, U.S.A.. – Materials Research Society., 2001. – ISBN 1558996397. DOI: 10.1557/PROC-703-V6.19 РИНЦ
Temperature Dependence of Electroresistivity, Negative and Positive Magnetoresistivity of Graphite/Diamond Nanocomposites and Onion-Like Carbon
In compilation Nanophase and nanocomposite materials IV : symposium held November 26-29, 2001, Boston, Massachusetts, U.S.A.. – Materials Research Society., 2001. – ISBN 1558996397. DOI: 10.1557/PROC-703-V6.19 РИНЦ
Dates:
Published print: | Jan 1, 2001 |
Published online: | Mar 15, 2011 |
Identifiers:
Elibrary | 15033494 |
Chemical Abstracts | 2002:501768 |
Chemical Abstracts (print) | 137:224661 |
OpenAlex | W2077424727 |