TY - JOUR
T1 - Pressure effects on spin-gap and antiferromagnetism in the hole-doped spin ladder system Sr2.5Ca11.5Cu24O41
AU - Katano, S.
AU - Nagata, T.
AU - Fujino, H.
AU - Akimitsu, J.
AU - Nishi, M.
AU - Kakurai, K.
N1 - Funding Information:
This work was partly supported by a Grant-in-Aid for Science Research from the Ministry of Education, Science, Sports and Culture of Japan and also by a grant from CREST of Japan Science and Technology Corporation.
PY - 1999
Y1 - 1999
N2 - The spin singlet state and the hole-induced antiferromagnetism of the spin ladder system Sr2.5Ca11.5Cu24O41, which shows superconductivity under high pressure, have been studied by neutron scattering under the pressures up to 3.0 GPa. The results for the spin gap excitations indicate that the intensity decreases progressively with increasing pressure; however, they suggest that the spin gap energy is almost the same as that at ambient pressure, ∼32 meV. The intensity for the antiferromagnetic order, and the magnetic moment, decreases with increasing pressure, and seems to disappear at the critical pressure for the superconductivity. On the other hand, the Néel temperature TN (about 2 K at ambient pressure) increases slightly.
AB - The spin singlet state and the hole-induced antiferromagnetism of the spin ladder system Sr2.5Ca11.5Cu24O41, which shows superconductivity under high pressure, have been studied by neutron scattering under the pressures up to 3.0 GPa. The results for the spin gap excitations indicate that the intensity decreases progressively with increasing pressure; however, they suggest that the spin gap energy is almost the same as that at ambient pressure, ∼32 meV. The intensity for the antiferromagnetic order, and the magnetic moment, decreases with increasing pressure, and seems to disappear at the critical pressure for the superconductivity. On the other hand, the Néel temperature TN (about 2 K at ambient pressure) increases slightly.
KW - Antiferromagnetism
KW - High pressure
KW - Neutron scattering
KW - Spin gap
KW - Spin ladder
KW - SrCaCuO
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U2 - 10.1016/S0921-4526(98)00692-9
DO - 10.1016/S0921-4526(98)00692-9
M3 - Article
AN - SCOPUS:9344251107
VL - 259-261
SP - 1046
EP - 1047
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
ER -