Record-High Trapped Magnetic Field by Pulse Field Magnetization Using GdBaCuO Bulk Superconductor

概要

論文の詳細を見る
A trapped magnetic field ${B_{\text{T}}}^{\text{P}}$ as high as 4.47 T, which is the highest reported using pulse field magnetization to date, has been realized on the surface of a GdBaCuO bulk superconductor by a modified multi pulse technique combined with stepwise cooling. Following an introduction of a small amount magnetic flux into the bulk center by applying lower pulse fields $B_{\text{ex}}=4.5--4.6$ T twice at a higher starting temperature $T_{\text{s}}=45--48$ K, higher fields of $B_{\text{ex}}=6.6--6.7$ T are applied three times at a lower $T_{\text{s}}=28--29$ K. The reduction in the temperature rise due to the already existing trapped flux, in addition to the optimization of the higher $B_{\text{ex}}$ value at the lower $T_{\text{s}}$, is a key point in enhancing ${B_{\text{T}}}^{\text{P}}$.
Japan Society of Applied Physicsの論文
2005-09-10