Neutron scattering study of Fe(Se1-xTex)0.92(x=0.75,1)

Magnetic fluctuations of Fe(Se1-xTex)0.92(x=0.75,1) are investigated by using neutron scattering technique. Non-superconducting FeTe0.92 shows a pronounced magnetic fluctuation around |Q|≈0.9Å-1, which is slightly smaller than the magnetic ordering vector |Q|≈0.97Å-1(Q=(0.5,0,0.5)). On the other han...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2010-12, Vol.470 (SUP1), p.S401-S403
Main Authors: Iikubo, S., Fujita, M., Niitaka, S., Takagi, H., Ohtani, H., Hasebe, M.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
formula omitted
Iron-based superconductor
Magnetic fluctuation
Magnetic properties
Neutron scattering
Physics
Properties of type I and type II superconductors
Superconductivity
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Summary:Magnetic fluctuations of Fe(Se1-xTex)0.92(x=0.75,1) are investigated by using neutron scattering technique. Non-superconducting FeTe0.92 shows a pronounced magnetic fluctuation around |Q|≈0.9Å-1, which is slightly smaller than the magnetic ordering vector |Q|≈0.97Å-1(Q=(0.5,0,0.5)). On the other hand, superconductor Fe(Se0.25Te0.75)0.92 shows a magnetic fluctuation at |Q|≈1.2Å-1, which is close to a reciprocal lattice vector Q = (0.5,0.5,0.5) or (0.5,0.5,0), at higher energies. This result suggests that the AF fluctuations characterized by 2D vector Q=(0.5,0.5) may play an important role in superconductivity.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2009.10.135