Magnetic-field-induced density of states in MgB2: Spin susceptibility measured by conduction-electron spin resonance

F. Simon, A. Jánossy, T. Fehér, F. Murányi, S. Garaj, L. Forró, C. Petrovic, S. Bud'Ko, R. A. Ribeiro, P. C. Canfield

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The magnetic-field dependence of the electron spin susceptibility χs was measured in the superconducting state of high-purity MgB2 fine powders from the intensity of the conduction-electron spin resonance at 3.8, 9.4, and 35GHz. The measurements confirm that a large part of the density of states is restored at low temperatures at fields below 1T in qualitative agreement with the closing of the π band gaps in the two-band model. However, the increase of χs with field and temperature is larger than expected from current superconductor models of MgB2.

Original languageEnglish
Article number012511
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number1
DOIs
Publication statusPublished - Oct 27 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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