Year: 2001
Type: article
Abstract: We report the magnetic-field dependence of the irreversible magnetization of the recently discovered binary superconductor ${\mathrm{MgB}}_{2}.$ For the temperature region of $T<{0.9T}_{c},$ the contribution of the bulk pinning to the magnetization overwhelms that of the surface pinning. This was evident from the fact that the magnetization curves $M(H)$ were well described by the critical-state model without considering the reversible magnetization and the surface-pinning effect. It was also found that the $M(H)$ curves at various temperatures scaled when the field and the magnetization were normalized by the characteristic scaling factors ${H}^{*}(T)$ and ${M}^{*}(T),$ respectively. This feature suggests that the pinning mechanism determining the hysteresis in $M(H)$ is unique below ${T}_{c}.$
Institution: Pohang University of Science and Technology
Language: Latvian
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2054112914