High-sensitive superconducting magnetometry on a two-dimensional electron gas up to 10 Tesla

Link:
Autor/in:
Erscheinungsjahr:
1997
Medientyp:
Text
Beschreibung:
  • We report on new magnetization studies on a two-dimensional electron system (2DES) revealing spin splitting of the Landau levels. For this, we have built a high-sensitive susceptometer consisting of a low-noise thin-film de superconducting quantum interference device (SQUID) with a multiturn input coil and a wire-wound first-order gradiometer. The system noise level is only 40 ×10-6 Φ0/√(Hz) down to a frequency of a few Hz in unshielded environment. In background fields up to 10 T, the system exhibits significant low-frequency noise. At frequencies above 1 kHz, however, the SQUID sensitivity is barely affected and we have reached a value of about 10-14 J/T at 1 T and better than 10-13 J/T at 10 T. With this, we have studied the de Haas-van Alphen effect for a tunable 2DES starting from zero carrier density. © 1997 American Institute of Physics.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
Interne Metadaten
Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/ede7ef50-8a05-45a1-b06a-0b8a7ce8b90b