Coexistence of ferromagnetism and superconductivity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>CeO</mml:mi><mml:mrow><mml:mn>0.3</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">F</mml:mi><mml:mrow><mml:mn>0.7</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi>BiS</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>

Lee, J.; Demura, Satoshi; Stone, M. B.; Iida, Kazuki; Ehlers, Georg; Matsuda, M.; Deguchi, K.; Takano, Yoshihiko; Mizuguchi, Yoshikazu; Miura, Osuke; Louca, Despina; Lee, S. H.

doi:10.1103/physrevb.90.224410

Cited by 29 publications

(36 citation statements)

References 77 publications

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“…[19,20] Consequently a true spontaneous vortex lattice-formed in the absence of an applied field-still remains to be observed in any ferromagnetic superconductor. [27,[41][42][43][44][45][46][47] What is clear is that Li 1-x Fe x OHFeSe is a fascinating ferromagnetic superconductor, and further measurements to investigate the magnetic order and vortex formation in greater detail when appropriate single crystal samples become available should prove very interesting. …”

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Neutron investigation of the magnetic scattering in an iron-based ferromagnetic superconductor

et al. 2015

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Neutron diffraction and small angle scattering experiments have been carried out on the doubleisotopic polycrystalline sample ( 7 Li 0.82 Fe 0.18 OD)FeSe. Profile refinements of the diffraction data establish the composition and reveal an essentially single phase material with lattice parameters of a= 3.7827 Å and c= 9.1277 Å at 4 K, in the ferromagnetic-superconductor regime, with a bulk superconducting transition of T C = 18 K. Small angle neutron scattering (SANS) measurements in zero applied field reveal the onset of ferromagnetic order below T F ≈ 12.5 K, with a wave vector and temperature dependence consistent with an inhomogeneous ferromagnet of spontaneous vortices or domains in a mixed state. No oscillatory long range ordered magnetic state is observed. Field dependent measurements establish a separate component of magnetic scattering from the vortex lattice, which occurs at the expected wave vector. The temperature dependence of the vortex scattering does not indicate any contribution from the ferromagnetism, consistent with diffraction data that indicate that the ordered ferromagnetic moment is quite small. PACS: 74.70.Xa, 74.25.Ha, 75.25.Uv; 75.25.-j *corresponding author. Jeffrey.Lynn@nist.gov 2 The magnetic properties of superconductors have a rich and interesting history. Early work showed that even tiny concentrations of magnetic impurities destroyed the superconducting pairing through the exchange-driven spin depairing mechanism, prohibiting any possibility of cooperative magnetic behavior.[1] The first exception to this rule was provided by the cubic rare-earth substituted CeRu 2 alloys [2][3][4], while the ternary Chevrel-phase (and related) superconductors (e.g. RMo 6 S 8 , R=rare earth) provided the first demonstrations of long range magnetic order coexisting with superconductivity. [5,6] The magnetic ordering temperatures were all quite low (~1 K), where electromagnetic (dipolar + London penetration depth) interactions play a dominate role in the energetics of the magnetic system. The vast majority of these materials order antiferromagnetically where coexistence of long range order with superconductivity was common, but these materials also provided the first examples of the rare occurrence of ferromagnetism and consequent competition with superconductivity in ErRh 4 B 4 , [7][8][9][10] HoMo 6 S 8 , [11][12][13] and HoMo 6 Se 8 .[14] Antiferromagnetic order is found for all the rare earths in the cuprates, which exhibit similar low ordering temperatures. [15] In the borocarbide superconductors again of all the magnetic order is antiferromagnetic, [16] with the singular exception of ErNi 2 B 2 C at low temperature [17,18] where a net magnetization developed that resulted in the spontaneous formation of flux quanta (vortices). [19,20] For the high-T C superconductors of direct interest here, there have been no ferromagnets in either the cuprate or iron-based systems, [15,[21][22][23] [28] For this latter system T C can be as high as 43 K, together with the development of magnetic ord...

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Neutron investigation of the magnetic scattering in an iron-based ferromagnetic superconductor

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“…In order to investigate the type of magnetic ordering (question (2)), neutron powder diffraction measurements were performed on a high-pressure annealing sample with x = 0.7 [57]. The neutron powder diffraction pattern, which was obtained at 2 K, showed that the intensity of the (102) peak increased after the appearance of the magnetic transition at 8 K, as displayed in Fig.…”

Section: Coexistence Of Superconductivity and Magnetismmentioning

confidence: 99%

“…In Particular, the focus *Corresponding Author: Satoshi Demura: Tokyo University of Science, 1-3 Kagurazaka, Shinjyuku-ku, Tokyo, Japan, E-mail: demura@rs.tus.ac.jp will be on the effects of element substitution (See Sections 3 and 4). Second, the coexistence of magnetic ordering and superconductivity in CeO 1−x FxBiS 2 would be of interest to many readers [17,45,[55][56][57]. BiS 2 -based superconductors have a layered structure.…”

Section: Introductionmentioning

confidence: 99%

Evolution of superconductivity and magnetism in BiS2-based layered compounds

Demura¹

2016

Novel Superconducting Materials

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BiS 2 -based compounds constitute a new family of layered superconductors. In this article, several experimental findings on the superconductivity and related properties of the BiS 2 family are reviewed. In particular, the focus is on the conditions required for the emergence of superconductivity and higher superconducting transition temperature in the BiS 2 family: it is shown that optimizing the electron doping and crystal structure are important. Further, a few notable characteristics such as the coexistence of superconductivity and magnetism as well as the relation between the superconductivity and chargedensity-wave instability are introduced in brief.

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“…Eventually, CeO 1−x F x BiS 2 exhibits not only superconductivity but also ferromagnetic-like behaviors [11]. Furthermore, it is concluded that the superconducting and the magnetically ordered states coexist for higher x at low temperatures [12][13][14][15]. These findings have caused particular interest in this compound and stimulated further investigations of it [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%