TY - JOUR
T1 - Evolution of the physical properties with Na content in the cobalt oxide superconductors Nax CoO2 · 1.3 H2 O
AU - Matano, K.
AU - Zheng, G. q.
AU - Cmaidalka, J.
AU - Sun, Y.
AU - Meng, R. L.
AU - Chu, C. W.
N1 - Funding Information:
This work was supported in part by research grants from MEXT, NSF, the T. L. L. Temple Foundation, the John and Rebecca Moores Endowment, and DoE.
PY - 2006/5/1
Y1 - 2006/5/1
N2 - We report measurements on the cobalt oxide superconductors Nax CoO2 · 1.3 H2 O over a wide Na content range x = 0.25 - 0.34, using X-ray diffraction, susceptibility and 59Co nuclear quadrupole resonance (NQR) techniques. We find that Tc increases with decreasing x but reaches to a plateau for x {less-than or slanted equal to} 0.28, which correlates closely with the NQR frequency that measures the occupancy of the Co 3d-orbitals.
AB - We report measurements on the cobalt oxide superconductors Nax CoO2 · 1.3 H2 O over a wide Na content range x = 0.25 - 0.34, using X-ray diffraction, susceptibility and 59Co nuclear quadrupole resonance (NQR) techniques. We find that Tc increases with decreasing x but reaches to a plateau for x {less-than or slanted equal to} 0.28, which correlates closely with the NQR frequency that measures the occupancy of the Co 3d-orbitals.
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U2 - 10.1016/j.physb.2006.01.480
DO - 10.1016/j.physb.2006.01.480
M3 - Article
AN - SCOPUS:33646407538
SN - 0921-4526
VL - 378-380
SP - 871
EP - 872
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - SPEC. ISS.
ER -