TY - JOUR
T1 - 63Cu NMR study on Nd1.85Ce0.15CuO4+δ
AU - Miyagawa, K.
AU - Kawamura, H.
AU - Kanoda, K.
AU - Onose, Y.
AU - Taguchi, Y.
AU - Tokura, Y.
N1 - Funding Information:
The authors would like to thank staff of Low Temperature Center in University of Tokyo for the technical support. This work is supported by the PRESTO program from JST Corporation and by Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Sports, Japan.
PY - 2003/5
Y1 - 2003/5
N2 - The title material is known as an electron-doped high-TC superconductor, while the as-grown sample is a semiconductor. The 63Cu NMR studies for the as-grown and reduced Nd1.85Ce0.15CuO4+δ single crystals were performed. The NMR spectra of both the samples show small and continuous distribution of νQ, which has nothing to do with the appearance/disappearance of superconductivity but may be structural in origin. Both crystals exhibit single-peaked central lines with different line width showing the single phase nature and no contamination of the other phase. The NMR signal of the as-grown sample disappears around 150 K due to the magnetic ordering. On the other hand, the line width of the reduced sample is narrower than that of the as-grown sample and shows weak temperature dependence. These behaviors indicate that the antiferromagnetic short range order is depressed when the sample is reduced.
AB - The title material is known as an electron-doped high-TC superconductor, while the as-grown sample is a semiconductor. The 63Cu NMR studies for the as-grown and reduced Nd1.85Ce0.15CuO4+δ single crystals were performed. The NMR spectra of both the samples show small and continuous distribution of νQ, which has nothing to do with the appearance/disappearance of superconductivity but may be structural in origin. Both crystals exhibit single-peaked central lines with different line width showing the single phase nature and no contamination of the other phase. The NMR signal of the as-grown sample disappears around 150 K due to the magnetic ordering. On the other hand, the line width of the reduced sample is narrower than that of the as-grown sample and shows weak temperature dependence. These behaviors indicate that the antiferromagnetic short range order is depressed when the sample is reduced.
KW - Electron dope
KW - High-T superconductor
KW - NMR
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U2 - 10.1016/S0921-4534(02)02411-5
DO - 10.1016/S0921-4534(02)02411-5
M3 - Conference article
AN - SCOPUS:0037850718
VL - 388-389
SP - 253
EP - 254
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
T2 - proceedings of the 23rd international conference on low temper
Y2 - 20 August 2002 through 27 August 2002
ER -