Vortex pinning and stability in the low field, superconducting phases of UPt_3
Vortex pinning and stability in the low field, superconducting phases of UPt_3
复制标题
UPt_3 低场超导相中的涡旋钉扎和稳定性
DOI:
10.1103/physrevlett.80.1078
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发表时间:
1998
影响因子:
8.6
通讯作者:
M. Sigrist
中科院分区:
文献类型:
--
作者:
E. Shung;T. Rosenbaum;M. Sigrist
We use an array of miniature Hall probe magnetometers to probe the entry and flow of flux in a single crystal torus or the heavy fermion superconductor UPt_3. Local measurements over the hole are exquisitely sensitive to vortex motion anywhere in the torus, and they permit us to detect avalanches restricted to and with a sharp onset in the lower temperature superconducting phase. Computer simulations support a mechanism dependent upon the degenerate nature of the superconducting order parameter.