SQUID and magneto-optic investigations of flux turbulence in the critical state

Michael Rudolf Koblischka, T. H. Johansen, M. Baziljevich, Masato Murakami

研究成果: Article

1 引用 (Scopus)

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.

元の言語English
ページ(範囲)153-157
ページ数5
ジャーナルJournal of Superconductivity and Novel Magnetism
15
発行部数2
出版物ステータスPublished - 2002
外部発表Yes

Fingerprint

Magnetooptical effects
SQUIDs
magneto-optics
Turbulence
turbulence
Fluxes
Magnetometers
Magnetic moments
Temperature
magnetometers
temperature
Magnetization
magnetic moments
Single crystals
Imaging techniques
magnetization
single crystals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)

これを引用

@article{06d92e48d970432383eaa895a87f439a,
title = "SQUID and magneto-optic investigations of flux turbulence in the critical state",
abstract = "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.",
keywords = "Critical state, Flux turbulence, Instability, Magnetization measurements, Magneto-optics",
author = "Koblischka, {Michael Rudolf} and Johansen, {T. H.} and M. Baziljevich and Masato Murakami",
year = "2002",
language = "English",
volume = "15",
pages = "153--157",
journal = "Journal of Superconductivity and Novel Magnetism",
issn = "1557-1939",
publisher = "Springer New York",
number = "2",

}

TY - JOUR

T1 - SQUID and magneto-optic investigations of flux turbulence in the critical state

AU - Koblischka, Michael Rudolf

AU - Johansen, T. H.

AU - Baziljevich, M.

AU - Murakami, Masato

PY - 2002

Y1 - 2002

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 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.

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 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.

KW - Critical state

KW - Flux turbulence

KW - Instability

KW - Magnetization measurements

KW - Magneto-optics

UR - http://www.scopus.com/inward/record.url?scp=10144237907&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=10144237907&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:10144237907

VL - 15

SP - 153

EP - 157

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

SN - 1557-1939

IS - 2

ER -