Electrical Resistance and Magnetoresistance in Quasi-Crystalline and Amorphous Al-Mn Alloys

Naoki Toyota, Kazuaki Fukamichi, Akihisa Inoue, Kunio Matsuzaki, Tsuyoshi Masumoto

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Temperature and magnetic field dependences of the electrical resistance R(T, H) of a quasi-crystalline (QC) Al–22.5 at%Mn and its counterpart amorphous (AM) alloys have been studied. Little difference in R(T, H) between these two phases is observed accompanying the following common characteristics. The resistance in the absence of magnetic field has a – log T dependence which holds down to near the spin-glass freezing temperature Tf (8.5 K for QC, 7.4 K and 10 K for AM: Al–22.4 and –24.3 at%Mn, respectively). Below Tf, R(T) deviates downward from the –log T curve. A negative magnetoresistance is observed at low temperatures below 10 K and monotonically enhanced on cooling. These behaviors may be understood in terms of the Kondo effect in a spin-glass state.

Original languageEnglish
Pages (from-to)1724-1728
Number of pages5
Journaljournal of the physical society of japan
Volume57
Issue number5
DOIs
Publication statusPublished - 1988 Jan 1

Keywords

  • Kondo effect
  • amorphous Al–Mn alloy
  • electrical resistance
  • magnetoresistance
  • quasi-crystalline Al–Mn
  • spin glass

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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