抄録
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 characteristic steps in the magnetic moment measured by means of a SQUID magnetometer, which allows a continuous temperature sweep. A direct correlation between the steps and the MO images is established. Using these 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. Flux turbulence is also observed in magnetization loops. Furthermore, we present tests for turbulence in several different high-Tc samples.
本文言語 | English |
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ページ(範囲) | 153-157 |
ページ数 | 5 |
ジャーナル | Journal of Superconductivity and Novel Magnetism |
巻 | 15 |
号 | 2 |
出版ステータス | Published - 2002 |
外部発表 | はい |
ASJC Scopus subject areas
- 電子材料、光学材料、および磁性材料
- 凝縮系物理学