Physics – Condensed Matter – Superconductivity
Scientific paper
2003-05-17
Physics
Condensed Matter
Superconductivity
15 pages, 6 figures
Scientific paper
Strong evidences of a spin glass phase on polycrystalline RuSr2Ln1.5Ce0.5Cu2O10-x (LnRu-1222, Ln = Y, Ho and Dy) is provided by ac susceptibility and dc magnetization measurements. The fingerprint of a spin glass transition, the frequency-dependent cusp in ac susceptibility vs. T measurements at low magnetic field, is observed for all LnRu-1222 samples. The strong supression of the cusp in the ac susceptibility measurement in the presence of magnetic fields as low as 500 Oe, and the results of thermoremanent magnetization (TRM) and isothermal remanent magnetization (IRM) measurements are also evidences of a spin glass behavior. By comparing these results with measurements on a YRu-1212 sample we conclude that the glassy behavior is characteristic of the Ru-1222 phase, not being observed for the studied YRu-1212 sample. We suggest that the spin glass transition occur only in the Ru-1222 phase possibly due to the larger number of oxygen vacancies present in these compounds.
Araujo-Moreira Fernando M.
Awana* V. P. S.
Cardoso C. A.
de Lima O. F.
Kishan Hari
No associations
LandOfFree
Spin Glass Behavior in the Ru-1222 and Ru-1212 rutheno-cuprate families: a comparative study does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spin Glass Behavior in the Ru-1222 and Ru-1212 rutheno-cuprate families: a comparative study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin Glass Behavior in the Ru-1222 and Ru-1212 rutheno-cuprate families: a comparative study will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-30097