5 papers
Quantum tunneling of vortices in a MgB superconductor
Y. Z. Zhang, R. Deltour, H. H. Wen +5
Magnetic relaxation in a MgB superconductor was measured. The temperature dependence of the normalized relaxation rate was determined for three different magnetic fields. By ex…
No Ending Point in The Bragg-to-Vortex Glass Phase Transition Line at Low Temperatures
S. L. Li, H. H. Wen, Z. W. Zhao
We have measured the magnetic hysteresis loops and the magnetic relaxation for (Bi-2212) single crystals which exhibit the second magnetization peak effect.…
Suppression of Superconducting Critical Current Density by Small Flux Jumps in Thin Films
Z. W. Zhao, S. L. Li, Y. M. Ni +7
By doing magnetization measurements during magnetic field sweeps on thin films of the new superconductor , it is found that in a low temperature and low field region small f…
Strong quantum fluctuation of vortices in the new superconductor
H. H. Wen, S. L. Li, Z. W. Zhao +6
By using transport and magnetic measurement, the upper critical field and the irreversibility line has been determined. A big separation between $H_{c2}(0)…
Lower Critical Field at Odds with A S-Wave Superconductivity in The New Superconductor
S. L. Li, H. H. Wen, Z. W. Zhao +6
The lower critical field has been carefully measured on a well shaped cylindrical sample of the new superconductor fabricated by high pressure synthesis. The penet…