摘要
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.
原文 | English |
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頁(從 - 到) | 7195-7198 |
頁數 | 4 |
期刊 | Physical Review B |
卷 | 35 |
發行號 | 13 |
DOIs | |
出版狀態 | Published - 1987 |
All Science Journal Classification (ASJC) codes
- 凝聚態物理學