Enhanced pinning in high-temperature superconducting cuprate single crystals at low magnetic field

Funct. Mater. 2013; 20 (1): 5-9.

Автор(и)

  • V.Yu. Monarkha B.Verkin Institute for Low Temperature Physics & Engineering, National Academy of Sciences of Ukraine, 47 Lenin Ave., 61103 Kharkiv, Ukraine Автор
  • Yu.A. Savina B.Verkin Institute for Low Temperature Physics & Engineering, National Academy of Sciences of Ukraine, 47 Lenin Ave., 61103 Kharkiv, Ukraine Автор
  • V.P. Timofeev B.Verkin Institute for Low Temperature Physics & Engineering, National Academy of Sciences of Ukraine, 47 Lenin Ave., 61103 Kharkiv, Ukraine Автор

DOI:

https://doi.org/10.15407/fm20.01.005

Ключові слова:

high-temperature superconducting , cuprate single crystals , low magnetic field

Анотація

Low density flux dynamics in Nd based cuprate (NdBa2Cu3O7–x) HTSC single crystals trapped in ≈1 Oe range DC magnetic fields were investigated for the first time. Complex measurements of time, temperature and field dependence of magnetization were performed. Using the results obtained and the Anderson-Kim model the normalized magnetization relaxation rate S and the averaged effective pinning potential U were calculated. We show a significant increase in the effective pinning potential in comparison with measurements performed in high magnetic fields for similar cuprate single crystals formerly. In a wide enough range of temperatures close to Tc (0.72≤ T/Tc ≤ 0.93) it has been shown that the doping of NdBa2Cu3O7–x single crystals with calcium atoms leads to an increase of the averaged effective pinning potential with an insignificant decreasing of the critical temperature.

 

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Завантаження

Опубліковано

22.03.2013

Номер

Том 20 № 1 (2013): "Functional materials", Vol.20, No.1, 2013.

Розділ

Research Articles

Ліцензія

Creative Commons License

Ця робота ліцензується відповідно до ліцензії Creative Commons Attribution 4.0 International License.

Як цитувати

Enhanced pinning in high-temperature superconducting cuprate single crystals at low magnetic field: Funct. Mater. 2013; 20 (1): 5-9. (2013). Functional Materials, 20(1), 5-9. https://doi.org/10.15407/fm20.01.005