Abstract
Investigations on flux dynamics of ring-shaped T12Ba2CaCu2O8 superconducting thin films have been carried out by measuring the temperature dependent magnetization M(T) during field-cooling (FC) and zero-field-cooling (ZFC) processes. For a given magnetic field, from the magnetization behavior two distinct temperatures, Tkink and Tirr, can be defined. Below Tkink, a clear hysteretic behavior of M(T) is observed leading to a large irreversible signal ΔM = MFC − MZFC. Above Tkink, this irreversible signal, though being very small, is still non-zero until it eventually vanishes at a higher temperature Tirr. Above Tirr, both curves MFC(T) and MZFC(T) merge together and become temperature independent. We attribute the first region ( T< Tkink) to a 3D vortex-glass phase, the second region (Tkink < T < Tirr) to a vortex line liquid state and the third region (Tirr < T < Tc) to a pancake liquid state.
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REFERENCES
G. Blatter, M.V. Feigel'man, V.B. Geshkenbein, A.I. Larkin and V.M. Vinokur, Rev. Mod. Phys. 66, 1125 (1994).
L.I. Glazmann, A.E. Koshelev, Phys. Rev. B 43, 2835 (1991).
S. Ryu, A. Kapitulnik and S. Doniach, Phys. Rev. Lett. 77, 2300 (1996).
T. Giamarchi and P. Le Doussal, Phys. Rev. Lett. 72, 1530 (1994). See also, Phys. Rev. B 55, 6577 (1997).
S.L. Yan, L. Fang, Q.X. Song, J. Yan, Y.P. Zhu, J.H. Chen and S.B. Zhang, Appl. Phys. Lett. 63, 1845 (1993).
M.P.A. Fisher, Phys. Rev. Lett. 62, 1415 (1989). See also R.H.Koch et al., Phys. Rev. Lett. 63, 1511 (1989).
C.D. Keener, M.L. Trawick, S.M. Ammirata, S.E. Hebboul and J.C. Garland, Phys. Rev. Lett. 78, 1118 (1997).
H.H. Wen, H.A. Radovan, T. Herzog and P. Ziemann, to be published.
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Wen, HH., Radovan, H.A., Herzog, T. et al. Flux Dynamics in Tl2Ba2CaCu2O8 Thin Films. Journal of Superconductivity 11, 47–48 (1998). https://doi.org/10.1023/A:1022621626876
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DOI: https://doi.org/10.1023/A:1022621626876