TY - JOUR
T1 - SQUID and magneto-optic investigations of flux turbulence
AU - Koblischka, M. R.
AU - Johansen, T. H.
AU - Baziljevich, M.
AU - Murakami, M.
AU - Wolf, Th
N1 - Funding Information:
This work is partially supported by the Danish Technical Research Council and the Research Council of Norway; MRK acknowledges support from STA during the stay at SRL/ISTEC.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2000
Y1 - 2000
N2 - Instabilities of the critical state ("turbulence") are observed in various high-Tc single crystals by means of magneto-optic (MO) imaging. Using the same samples as in the MO investigations, we observe for the first time characteristic steps in the magnetic moment measured by means of a SQUID system, which allows a continuous temperature sweep. A direct correlation between the steps and the MO images is established. Using this SQUID measurements, a much wider range of field and temperature can be covered. As a result, we find turbulence not only in a narrow temperature window, but also in a field window ranging between 0 and 80 mT. Furthermore, we present tests for turbulence in several different high-Tc samples.
AB - Instabilities of the critical state ("turbulence") are observed in various high-Tc single crystals by means of magneto-optic (MO) imaging. Using the same samples as in the MO investigations, we observe for the first time characteristic steps in the magnetic moment measured by means of a SQUID system, which allows a continuous temperature sweep. A direct correlation between the steps and the MO images is established. Using this SQUID measurements, a much wider range of field and temperature can be covered. As a result, we find turbulence not only in a narrow temperature window, but also in a field window ranging between 0 and 80 mT. Furthermore, we present tests for turbulence in several different high-Tc samples.
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U2 - 10.1016/S0921-4534(00)00885-6
DO - 10.1016/S0921-4534(00)00885-6
M3 - Article
AN - SCOPUS:0342527024
VL - 341-348
SP - 1275
EP - 1276
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - PART 3
ER -