Transverse-and zero-field μSR investigation of magnetism and superconductivity in (Y1?xPr
x
)Ba2Cu3O7 |
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| Authors: | D W Cooke M S Jahan R S Kwok R L Lichti T R Adams C Boekema W K Dawson A Kebede J Schwegler J E Crow T Mihalisin |
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| Institution: | (1) Los Alamos National Laboratory, 87545 Los Alamos, New Mexico, USA;(2) Texas Tech University, 79409 Lubbock, Texas, USA;(3) San Jose State University, 95192 San Jose, California, USA;(4) Temple University, 19122 Philadelphia, Pennsylvania, USA |
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| Abstract: | Zero-field muon-spin-rotation (μSR) measurements on (Y1? x Pr x )Ba2Cu3O7 x=1.0, 0.8, 0.6, and 0.54] show evidence for antiferromagnetic ordering of the Cu moments within the Cu?O planes, with Néel temperatures 285, 220, 35. 30 and 20 K, respectively. Forx=1.0 the local muon magnetic field is ≈16 mT, but decreases to ≈12 mT at 17K, due to additional magnetic ordering. The zero-field data, in conjunction with transport data, allow construction of a complete phase diagram for this system. Transverse-field (1 kOe) μSR data forx=0.2 (T c =75 K) show that the muon depolarization is determined primarily by the Cu nuclear moments forT>T c , and by the vortex state forT c . Fitting the superconducting-state data to a BCS model yields an extrapolated zero-temperature magnetic penetration depth of 2170 Å. |
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