We study the decays of the thermoremanent magnetization in Y0.90Na0.10MnO3 for different waiting times at the measuring temperature 33K, well below the spin gla
We report on a new method to prepare large quantity single-walled carbon nanotubes (SWCNTs) with high purity.Using a Y-Ni powder composite graphite rod as an an
An optical spectroscopic observation was made towards the circumstellar nebula of the supergiant VI Cyg 12, for the first time to the best of our knowledge. Sev