TY - JOUR
T1 - Muon spin relaxation study of the anomalous magnetic behavior in excess-oxygen-doped La1.8 Nd0.2 Cu O4+δ (0.020≤δ≤0.101)
AU - Watanabe, I.
AU - Oki, N.
AU - Adachi, T.
AU - Mikuni, H.
AU - Koike, Y.
AU - Pratt, F. L.
AU - Nagamine, K.
PY - 2006
Y1 - 2006
N2 - Zero-field muon-spin-relaxation measurements have revealed the hole-concentration dependence of a static magnetically ordered state of Cu spins in excess-oxygen-doped La1.8 Nd0.2 Cu O4+δ with δ ranging from δ=0.020 to 0.101. Muon-spin precession is observed at 1.7 K for δ≤0.0625, consistent with the appearance of a long-range-ordered state of Cu spins. The volume fraction of the long-range-ordered state decreases rapidly with increasing δ, and a static magnetically disordered state of Cu spins becomes dominant for δ>0.030. The magnetic correlations between Cu spins are anomalously enhanced for δ=0.055 and near the hole concentration is 1 8 per Cu, and the superconductivity is simultaneously suppressed. The present results confirm that the so-called 1 8 anomaly is present in the excess-oxygen-doped system in addition to substitutionally doped systems.
AB - Zero-field muon-spin-relaxation measurements have revealed the hole-concentration dependence of a static magnetically ordered state of Cu spins in excess-oxygen-doped La1.8 Nd0.2 Cu O4+δ with δ ranging from δ=0.020 to 0.101. Muon-spin precession is observed at 1.7 K for δ≤0.0625, consistent with the appearance of a long-range-ordered state of Cu spins. The volume fraction of the long-range-ordered state decreases rapidly with increasing δ, and a static magnetically disordered state of Cu spins becomes dominant for δ>0.030. The magnetic correlations between Cu spins are anomalously enhanced for δ=0.055 and near the hole concentration is 1 8 per Cu, and the superconductivity is simultaneously suppressed. The present results confirm that the so-called 1 8 anomaly is present in the excess-oxygen-doped system in addition to substitutionally doped systems.
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U2 - 10.1103/PhysRevB.73.134506
DO - 10.1103/PhysRevB.73.134506
M3 - Article
AN - SCOPUS:33645633179
VL - 73
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 13
M1 - 134506
ER -