Abstract
X-ray diffraction of La1.8Ba0.2CuO4-y reveals two macroscopically segregated tetragonal (K2NiF4-type) phases of nearly identical lattice parameter. Many peaks show additional broadening upon cooling. This broadening is consistent with a spontaneous monoclinic distortion, with an onset temperature of 150 K, and is possibly relevant to the superconducting properties. Small single crystals of 70 m diameter within the powder aggregate are also studied and show a similar two-phase constituency and a resolvable peak splitting at low temperature.
Original language | English |
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Pages (from-to) | 7195-7198 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 35 |
Issue number | 13 |
DOIs | |
Publication status | Published - 1987 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics