Magnetic properties of MoS2: Existence of ferromagnetism

We report on the magnetic properties of MoS2 measured from room temperature down to 10K and magnetic fields up to 5T. We find that single crystals of MoS2 display ferromagnetism superimposed onto large temperature-dependent diamagnetism and have observed that ferromagnetism persists from 10K up to room temperature. We attribute the existence of ferromagnetism partly to the presence of zigzag edges in the magnetic ground state at the grain boundaries. Since the magnetic measurements are relatively insensitive to the interlayer coupling, these results are expected to be valid in the single layer limit. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4753797]