| Autor: |
Husanikova, P., Fedor, J., Derer, J., Soltys, J., Cambel, V., Iavarone, M., May, S. J., Karapetrov, G. |
| Rok vydání: |
2013 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| Popis: |
We have investigated the magnetization properties and flux dynamics of superconducting Cu$_x$TiSe$_2$ single crystals within wide range of copper concentrations. We find that the superconducting anisotropy is low and independent on copper concentration ($\gamma\sim1.7$), except in the case of strongly underdoped samples ($x\leq0.06$) that show a gradual increase in anisotropy to $\gamma\sim1.9$. The vortex phase diagram in this material is characterized by broad region of vortex liquid phase that is unusual for such low-$T_c$ superconductor with low anisotropy. Below the irreversibility line the vortex solid state supports relatively low critical current densities as compared to the depairing current limit ($J_c/J_0\sim10^{-7}$). All this points out that local fluctuations in copper concentration have little effect on bulk pinning properties in this system. |
| Databáze: |
arXiv |
| Externí odkaz: |
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