NMR and NQR Studies on Antiferromagnetism and Superconductivity in Pb2Sr2(RE1-xCax)Cu3O8 (RE = Y, Eu and Gd)
Antiferromagnetic order at the Cu(2) site is confirmed in the insulating Pb2Sr2RECu3O8 (RE=Y, Eu and Gd) by Cu-nuclear magnetic resonance. In the Ca-doped superconducting samples, the Ca-concentration dependence of Cu-spectra and the temperature dependence of T1 of 63Cu(1), 63Cu(2) and 207Pb are investigated. An anomalous modulation behavior of spin echo decay curves of Cu(1) is discussed.
KeywordsElectric Field Gradient Antiferromagnetic Order Superconducting Sample Pulse Separation Small Magnetic Field
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