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A temperature dependence of a width of $\Delta$H = $\Delta$B region has beenstudied for 5 wt.\% (Fe, Ti) particle-doped MgB$_2$ superconductor. The resultrevealed that widths of the region are linear along temperature. Here we showthe meaning of the result and details of the calculation. In previous report,we represented a theory that a width of $\Delta$H = $\Delta$B region is relatedwith upper critical field of the superconductor, which is that pinned fluxes atvolume defect are picked out and move in $\Delta$H = $\Delta$B region when adistance between them is the same as that of upper critical field. Thus, weinspected the relationship between a width of the region and upper criticalfield along temperature. The theory would gain another justification iftemperature dependence of a width of the region is proportional to that ofupper critical field. We discussed several topics for $\Delta$H = $\Delta$Bregion of 5 wt.\% (Fe, Ti) particle-doped MgB$_2$ superconductor, which are Feof (Fe, Ti) particle, Bean model, volume dependence of the region, etc..

Temperature Dependence of a Width of $\Delta$H = $\Delta$B Region in 5 wt.\% (Fe, Ti) Paticle-Doped MgB$_2$ Superconductor