Spin-glass behavior in zero magnetic field using tunnel resistance

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

Research output: Contribution to journalArticlepeer-review

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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