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RISCoexistence of the δl and δTc flux pinning mechanism in nano-Si doped MgB2
The flux pinning mechanisms of nano-Si-doped MgB2 are reported in this work. The field
dependence of the critical current density, Jc(B), was analyzed within the collective pinning
model. We found that the mechanisms for both δl...
Flux pinning mechanism in codoped-MgB2 with Al2O3 and SiC
–Landau parameter, was used to study the flux pinning mechanisms. It was found that theΔκeffect and the normal point pinning mechanisms play the main role in the flux pinning at the magnetic field lower than Hmax and the contribution of the Δκ mechanism increases...
Flux pinning mechanism in SiC and nano-C doped MgB2: Evidence for transformation from δTc to δl pinning
doped with SiC in comparison with the nano-C doped sample. The flux pinning mechanisms of both doped MgB2 superconductors have been investigated based on the collective theory. It was found that the pinning mechanism in MgB2 was transformed by SiC doping...
On the Determination of Pinning Mechanisms and Regimes in Type-II Superconductors with Weak Thermal Fluctuations
Determination of pinning mechanisms is an important topic in the study of practical type-II superconductors. In this paper, we modify the underlying assumptions of the conventional model, which is used to determine the ...
Effects of the sintering temperature on the flux-pinning mechanism and the activation energy of malic-acid doped MgB2
The flux-pinning mechanism and activation energy of 10 wt % malic acid-doped MgB2 were investigated by measuring of the critical current density and resistivity as a function ofmagnetic field and temperature. A crossover field, Bsb, was observed...
Enhancement of the in-field Jc of MgB2 via SiCl4 doping
variation in the charge-carrier mean free path is responsible for the flux-pinning mechanism in the SiCl4 treated MgB2 with large in-field Jc....
Vortex flux pinning mechanism and enhancement of in-field Jc in succinic acid doped MgB2
The field dependence of the resistivity and the critical current density, Jc(B), ofMgB2 doped with10wt%
wet and dry succinic acid have been investigated by magnetic measurements.The dry succinic acid
significantly ...
Temperature and field dependence of the flux pinning mechanisms in Fe(1.06)Te(0.6)Se(0.4) single crystal
The temperature and magnetic field dependence of the magnetization and critical current density of 〖Fe〗_1.06 〖Te〗_0.6 〖Se〗_0.4 single crystal have been investigated, and the flux pinning mechanism has been analyzed. The critical current density...