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

doi:10.1103/PhysRevB.90.224410

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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Abstract

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 language	English
Article number	224410
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.90.224410
State	Published - Dec 8 2014

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title = "Coexistence of ferromagnetism and superconductivity in CeO0.3 F0.7BiS2",

abstract = "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.",

author = "J. Lee and S. Demura and Stone, \{M. B.\} and K. Iida and G. Ehlers and \{Dela Cruz\}, \{C. R.\} and M. Matsuda and K. Deguchi and Y. Takano and Y. Mizuguchi and O. Miura and D. Louca and Lee, \{S. H.\}",

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doi = "10.1103/PhysRevB.90.224410",

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T1 - Coexistence of ferromagnetism and superconductivity in CeO0.3 F0.7BiS2

AU - Lee, J.

AU - Demura, S.

AU - Stone, M. B.

AU - Iida, K.

AU - Ehlers, G.

AU - Dela Cruz, C. R.

AU - Matsuda, M.

AU - Deguchi, K.

AU - Takano, Y.

AU - Mizuguchi, Y.

AU - Miura, O.

AU - Louca, D.

AU - Lee, S. H.

PY - 2014/12/8

Y1 - 2014/12/8

N2 - 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.

AB - 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.

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JF - Physical Review B - Condensed Matter and Materials Physics

IS - 22

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ER -

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

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