Instability of the Critical State in NdBa2Cu3O7-δ Single Crystals

Michael Rudolf Koblischka, Masato Murakami, Satoru Koishikawa, Tom Henning Johansen, Michael Baziljevich, Thomas Frello, Thomas Wolf

研究成果: Article

4 引用 (Scopus)

抄録

Instabilities of the critical state are observed in various NdBa2Cu3O7-δ single crystals by means of direct magneto-optic (MO) imaging while warming up flux states containing vortices of opposite polarity. Using the same samples as in the MO investigations, we observe for the first time characteristic steps in the integral magnetization measured by means of a SQUID system, which allows a constant temperature sweep. The integral measurement technique enables the study of the instability phenomenon ("turbulence") in a much wider range of temperatures and fields than the MO investigations, and also in the orientations Ha ∥ c and Ha ⊥ c. As a result, we find turbulence not only in a narrow window of temperatures (65 ≤ T ≤ 80 K), but also in a window of applied negative fields ranging between 30 and 80 mT.

元の言語English
ページ(範囲)1483-1487
ページ数5
ジャーナルJournal of Low Temperature Physics
117
発行部数5-6
出版物ステータスPublished - 1999
外部発表Yes

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Magnetooptical effects
magneto-optics
Single crystals
single crystals
Turbulence
turbulence
SQUIDs
Temperature
temperature
Magnetization
polarity
Vortex flow
vortices
Fluxes
Imaging techniques
magnetization
heating

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

これを引用

Koblischka, M. R., Murakami, M., Koishikawa, S., Johansen, T. H., Baziljevich, M., Frello, T., & Wolf, T. (1999). Instability of the Critical State in NdBa2Cu3O7-δ Single Crystals. Journal of Low Temperature Physics, 117(5-6), 1483-1487.

Instability of the Critical State in NdBa2Cu3O7-δ Single Crystals. / Koblischka, Michael Rudolf; Murakami, Masato; Koishikawa, Satoru; Johansen, Tom Henning; Baziljevich, Michael; Frello, Thomas; Wolf, Thomas.

:: Journal of Low Temperature Physics, 巻 117, 番号 5-6, 1999, p. 1483-1487.

研究成果: Article

Koblischka, MR, Murakami, M, Koishikawa, S, Johansen, TH, Baziljevich, M, Frello, T & Wolf, T 1999, 'Instability of the Critical State in NdBa2Cu3O7-δ Single Crystals', Journal of Low Temperature Physics, 巻. 117, 番号 5-6, pp. 1483-1487.
Koblischka MR, Murakami M, Koishikawa S, Johansen TH, Baziljevich M, Frello T その他. Instability of the Critical State in NdBa2Cu3O7-δ Single Crystals. Journal of Low Temperature Physics. 1999;117(5-6):1483-1487.
Koblischka, Michael Rudolf ; Murakami, Masato ; Koishikawa, Satoru ; Johansen, Tom Henning ; Baziljevich, Michael ; Frello, Thomas ; Wolf, Thomas. / Instability of the Critical State in NdBa2Cu3O7-δ Single Crystals. :: Journal of Low Temperature Physics. 1999 ; 巻 117, 番号 5-6. pp. 1483-1487.
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