TY - JOUR
T1 - Neutron scattering study of Fe(Se1-xTex) 0.92(x = 0.75, 1)
AU - Iikubo, S.
AU - Fujita, M.
AU - Niitaka, S.
AU - Takagi, H.
AU - Ohtani, H.
AU - Hasebe, M.
N1 - Funding Information:
The authors thank M. Enoki and K. Ohoyama for their help in the neutron scattering measurements. This work was supported in part by a Grant-in-Aid for Young Scientists (B) ( 21740239 ) from the Japanese Ministry of Education, Culture, Sports, Science and Technology .
PY - 2010/12
Y1 - 2010/12
N2 - 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|≈0.9 Å-1, which is slightly smaller than the magnetic ordering vector |Q|≈0.97-1(Q=(0.5,0,0.5)). On the other hand, superconductor Fe(Se0.25Te0.75)0.92 shows a magnetic fluctuation at |Q|≈1.2 Å-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.
AB - 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|≈0.9 Å-1, which is slightly smaller than the magnetic ordering vector |Q|≈0.97-1(Q=(0.5,0,0.5)). On the other hand, superconductor Fe(Se0.25Te0.75)0.92 shows a magnetic fluctuation at |Q|≈1.2 Å-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.
KW - Fe(SeTe)y
KW - Iron-based superconductor
KW - Magnetic fluctuation
KW - Neutron scattering
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U2 - 10.1016/j.physc.2009.10.135
DO - 10.1016/j.physc.2009.10.135
M3 - Article
AN - SCOPUS:78649715043
SN - 0921-4534
VL - 470
SP - S401-S403
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SUPPL.1
ER -