Spin-glass behavior in zero magnetic field using tunnel resistance

Y. Takeuchi, K. Komatsu, H. Maki, T. Taniyama, T. Sato

Research output: Contribution to journalArticle

Abstract

The measurement of spin glass in zero magnetic field is essential to investigate the intrinsic nature of spin glass. We pay attention to tunnel resistance between spin-glass layers. The temperature dependence of tunnel resistance between spin-glass layers with the structure of AgMn / Al2 O3 / AgMn was measured, and was compared with that of Al / Al2 O3 / AgMn. For the junction of AgMn / Al2 O3 / AgMn, tunnel resistance shows a peak around the spin-glass transition temperature, but no peak was observed for the junction of Al / Al2 O3 / AgMn. The results indicate that the magnetic correlation between spin-glass layers is reflected to tunnel resistance. The singularity of the tunnel resistance between spin-glass layers is discussed by the droplet theory.

Original languageEnglish
Pages (from-to)1503-1505
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 2
DOIs
Publication statusPublished - 2007 Mar 1

Keywords

  • Resistance
  • Spin glass
  • Temperature dependence
  • Tunnel junction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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