Ferromagnetic- and superconducting-like behavior of the electrical resistance of inhomogeneous graphite flake

TL;DR

This study investigates the electrical resistance of inhomogeneous graphite flakes, revealing behaviors akin to ferromagnetism and superconductivity, influenced by magnetic fields and temperature variations.

Contribution

It provides new insights into the coexistence of magnetic order and superconducting-like behavior in heterogeneous graphite samples.

Findings

Observation of granular superconducting behavior.

Evidence of magnetic order in graphite.

Magnetoresistance depends on field orientation.

Abstract

We have measured the magnetic field and temperature dependence of the resistivity of several micrometers long and heterogeneously thick graphite sample. The magnetoresistance results for fields applied nearly parallel to the graphene planes show both a granular superconducting behavior as well as the existence of magnetic order in the sample.