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1. Enhancement of the ferromagnetic order of graphite after sulphuric acid treatment

Author

Barzola-Quiquia, J., Böhlmann, W., Esquinazi, P., Schadewitz, A., Ballestar, A., Dusari, S., Schultze-Nobre, L., and Kersting, B.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science
Abstract

We have studied the changes in the ferromagnetic behavior of graphite powder and graphite flakes after treatment with diluted sulphuric acid. We show that this kind of acid treatment enhances substantially the ferromagnetic magnetization of virgin graphite micrometer size powder as well as in graphite flakes. The anisotropic magnetoresistance (AMR) amplitude at 300 K measured in a micrometer size thin graphite flake after acid treatment reaches values comparable to polycrystalline cobalt., Comment: 3.2 pages, 4 figures

Published
2011
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