Spontaneous strain in Ba0.6K0.4BiO3

✍ Scribed by H. Fujishita; T. Yamada; S. Nakada; H. Okamoto; S. Shitara; M. Kato; Y. Koike

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 233 KB
• Volume: 470
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2009.11.023

✦ Synopsis

The lattice parameter of Ba 0:6 K 0:4 BiO 3 , which is a well-studied conventional superconductor, was measured by the X-ray Rietveld method between 10 K and room temperature. A very small change in the lattice parameter could be detected in the superconducting phase. The change could be attributed to a spontaneous strain generated in the superconducting phase by the coupling between a superconducting order parameter and the strain. It was concluded that this coupling phenomenon is common to all superconductors.