Abstract
The high-resolution Bitter pattern technique has been used to observe the vortex structure in 4% Al-doped YBa2Cu3O7-x single crystals at low magnetic fields in the range of 5-20 G. Analysis of the images showed development of both translational and orientational order in the vortex arrangement with an increase of the magnetic field. However, in all fields, the translational order decayed much faster than the orientational order, indicating the existence of a hexatic vortex glass state. Comparison of the results obtained with the existing data on Ba2.1Sr1.9Ca0.9Cu2O8+x and twin-free regions of YBa2Cu3O7-x suggests a similar behaviour of vortex ordering in all three materials.
| Original language | English |
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| Pages (from-to) | L990-L993 |
| Journal | Japanese Journal of Applied Physics |
| Volume | 32 |
| Issue number | Part 2, Number 7B |
| Publication status | Published - 1993 |