Magnetism and candidate muon-probe sites in RBa2Cu3O
y |
| |
| Authors: | W K Dawson C H Halim S P Weathersby J A Flint J C Lam T J Hoffman C Boekema KC B Chan R L Lichti D W Cooke M S Jahan J E Crow |
| |
| Institution: | (1) Physics Department, San Jose State University, 95192 San Jose, CA, USA;(2) Texas Tech University, Lubbock, (TX);(3) Los Alamos National Laboratory, Los Alamos, NM;(4) Temple University, Philadelphia, PA |
| |
| Abstract: | Key results of zero-field (ZF) and transverse-field (TF) muon-spin-relaxation (μSR) experiments on superconducting and insulating
RBa2Cu3O
y
(R123
y
, with R=Eu, Gd, Pr and Pr/Y:y=6, 7) are examined. The chemical behavior of the positive muon probe is addressed, and muon-oxygen bonding is shown to occur
in all these cuprates. To explain magnetic fields at muon-probe sites in Pr
x
Y1−x
Ba2Cu3O
y
(0<=x<0.5,y=7 andx=0,y=6) samples, improvements on the reported magnetic structures from neutron diffraction are necessary. Cu magnetism in Pr123y (y=6,7) is observed belowT
N1, which is near RT. The magnetism seen belowT
N2 can be interpreted assuming an additional ordering in the Cutt-O chain layers. Alternatively, Pr ordering is also considered
as the cause of the second phase transition. Considering the specific muon-probe location, a more detailed interpretation
can be provided for the μSR parameters, measured in the normal and mixed states of these unconventional superconductors. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
