TY - JOUR
T1 - Study of magnetic excitation spectra of several Fe-pnictide systems
AU - Sato, M.
AU - Kawamata, T.
AU - Kobayashi, Y.
AU - Yasui, Y.
AU - Iida, T.
AU - Suzuki, K.
AU - Itoh, M.
AU - Moyoshi, T.
AU - Motoya, K.
AU - Kajimoto, R.
AU - Nakamura, M.
AU - Inamura, Y.
AU - Arai, M.
PY - 2012
Y1 - 2012
N2 - Magnetic excitation spectra χ" (Q, ΔE) have been measured for several Fe-pnictides including Ca-Fe-Pt-As system (Tc ∼30 K), one of new superconducting systems with FeAs planes. For the Ca-Fe-Pt-As system, data were taken with the neutron spectrometer 4SEASONS at J-PARC for a large crystal. The spectral weight χ" (Q, ΔE) of this new system observed at the M point in the reciprocal space is enhanced with decreasing temperature T through Tc in the broad energy (ΔE) region around ∼12.5 meV. However, it seems not to be significant as compared with the sharp and strong enhancement in the Q and ΔE spaces expected for the S± symmetry, although the observed shape of χ"(Q, ΔE) is not masked by the resolution effect, indicating the result seems to be hard to explain, unless the S++ symmetry is introduced.
AB - Magnetic excitation spectra χ" (Q, ΔE) have been measured for several Fe-pnictides including Ca-Fe-Pt-As system (Tc ∼30 K), one of new superconducting systems with FeAs planes. For the Ca-Fe-Pt-As system, data were taken with the neutron spectrometer 4SEASONS at J-PARC for a large crystal. The spectral weight χ" (Q, ΔE) of this new system observed at the M point in the reciprocal space is enhanced with decreasing temperature T through Tc in the broad energy (ΔE) region around ∼12.5 meV. However, it seems not to be significant as compared with the sharp and strong enhancement in the Q and ΔE spaces expected for the S± symmetry, although the observed shape of χ"(Q, ΔE) is not masked by the resolution effect, indicating the result seems to be hard to explain, unless the S++ symmetry is introduced.
UR - http://www.scopus.com/inward/record.url?scp=84873646363&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84873646363&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/400/2/022105
DO - 10.1088/1742-6596/400/2/022105
M3 - Conference article
AN - SCOPUS:84873646363
SN - 1742-6588
VL - 400
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - PART 2
M1 - 022105
T2 - 26th International Conference on Low Temperature Physics, LT 2011
Y2 - 10 August 2011 through 17 August 2011
ER -