Spatially resolved magnetic hysteresis in a crystal measured by a Hall-probe array
T Tamegai, L Krusin-Elbaum, P Santhanam, MJ Brady… - Physical Review B, 1992 - APS
T Tamegai, L Krusin-Elbaum, P Santhanam, MJ Brady, WT Masselink, C Feild, F Holtzberg
Physical Review B, 1992•APSWe report local-magnetic-field measurements near a YBa 2 Cu 3 O 7− y crystal by a linear
array of Hall probes. Two distinct features are observed in the local-field hysteresis H l vs H,
which are not present in the integrated magnetization measured by a SQUID:(1) a peak in H
l right after the field reversal that we attribute to the field generated by the current flow in a
platelike superconductor, and (2) a position-dependent suppression of H l near zero
external field which may be linked to H c 1. These local measurements suggest a relevant …
array of Hall probes. Two distinct features are observed in the local-field hysteresis H l vs H,
which are not present in the integrated magnetization measured by a SQUID:(1) a peak in H
l right after the field reversal that we attribute to the field generated by the current flow in a
platelike superconductor, and (2) a position-dependent suppression of H l near zero
external field which may be linked to H c 1. These local measurements suggest a relevant …
Abstract
We report local-magnetic-field measurements near a YBa 2 Cu 3 O 7− y crystal by a linear array of Hall probes. Two distinct features are observed in the local-field hysteresis H l vs H, which are not present in the integrated magnetization measured by a SQUID:(1) a peak in H l right after the field reversal that we attribute to the field generated by the current flow in a platelike superconductor, and (2) a position-dependent suppression of H l near zero external field which may be linked to H c 1. These local measurements suggest a relevant scale for the critical current variation of between 10 and 200 μm.
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