Coexistence of ferromagnetism and superconductivity in CeO0.3 F0.7BiS2

J. Lee, S. Demura, M. B. Stone, K. Iida, G. Ehlers, C. R. Dela Cruz, M. Matsuda, K. Deguchi, Y. Takano, Y. Mizuguchi, O. Miura, D. Louca, S. H. Lee

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25 Citations (Scopus)


Bulk magnetization, transport, and neutron scattering measurements were performed to investigate the electronic and magnetic properties of a polycrystalline sample of the newly discovered ferromagnetic superconductor, CeO0.3F0.7BiS2. Ferromagnetism develops below TFM=6.54(8)K and superconductivity is found to coexist with the ferromagnetic state below TSC∼4.5K. Inelastic neutron scattering measurements reveal a very weakly dispersive magnetic excitation at 1.8 meV that can be explained by an Ising-like spin Hamiltonian. Under application of an external magnetic field, the direction of the magnetic moment changes from the c axis to the ab plane and the 1.8 meV excitation splits into two modes. A possible mechanism for the unusual magnetism and its relation to superconductivity is discussed.

Original languageEnglish
Article number224410
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number22
Publication statusPublished - 8 Dec 2014
Externally publishedYes


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