Low-temperature anomalies in thermal expansion of HTSCs: System Bi{sub 2}Sr{sub 2-x}La{sub x}CuO{sub 6}
Journal Article
·
· Journal of Experimental and Theoretical Physics
- Moscow Institute of Steel and Alloys (Russian Federation)
- Moscow State University (Russian Federation)
The data on thermal expansion at low temperatures have been obtained for HTSC single crystals of the system Bi{sub 2}Sr{sub 2-x}La{sub x}CuO{sub 6} with different doping levels. Anomalous (negative) thermal expansion is observed in the temperature range from 5 to 20 K. It is shown that the anomaly vanishes in an overdoped sample. An anomalously strong effect of magnetic fields of 2-4 T on the negative thermal expansion domain is observed. The effect of field screening, frozen field, doping level, defects and oxygen vacancies on the region of thermal expansion anomalies is investigated. The origin of the observed anomalies in the properties of the system Bi{sub 2}Sr{sub 2-x}La{sub x}CuO{sub 6}, as well as other HTSC systems in which similar anomalies have been observed, is discussed.
- OSTI ID:
- 21055084
- Journal Information:
- Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 6 Vol. 102; ISSN JTPHES; ISSN 1063-7761
- Country of Publication:
- United States
- Language:
- English
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