Effect of Microcrystalline Structure on the Transport Properties of Pristine and AsF5-Intercalated, Highly-Oriented, Pyrolytic Graphite

Autor(en)

W. Lang

Abstrakt

The transport properties of highly-oriented, pyrolytic graphite (HOPG)

of different grain size and mosaic spread and its intercalation

compounds (GIC) with AsF₅ were determined using contactless

eddy current methods for the measurement of conductivity and

magnetoresistance and a new inductive technique for the Hall effect. The

magnetoresistance is quadratic at small magnetic fields B in both

pristine and intercalated material. The Hall voltage raises linear with B

in the AsF₅-GIC, whereas the Hall coefficient displays a

much stronger field dependence in HOPG. The microcrystalline morphology

predominantly influences the transport properties of graphite at low

temperatures, where carrier scattering at crystallite boundaries becomes

the dominant mechanism. Intercalation with AsF₅ significantly diminishes the differences between the transport properties of the diverse pristine graphites.

Organisation(en)

Elektronische Materialeigenschaften

Journal

Synthetic Metals

Band

34

Seiten

491-496

Anzahl der Seiten

6

ISSN

0379-6779

DOI

https://doi.org/10.1016/0379-6779(89)90430-X

Publikationsdatum

1989

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/c3b72937-cf83-49e6-9625-10761d98a3a6