Magnetic property of potassium clusters in pressure-doped zeolite A

N. H. Nam, S. Araki, H. Shiraga, S. Kawasaki, Y. Nozue

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The pressure-doping technique was developed for further loading of guest potassium metal into porous crystals of zeolite beyond the upper limit at ambient pressure. A doping pressure dependence of the magnetic property of potassium clusters in cages of zeolite A is measured up to 320 MPa. The Curie constant monotonically decreases with increase in the doping pressure and shows very small values above 250 MPa. The magnetic susceptibility at 2 K, however, gradually increases and has a peak at 200 MPa. Observed decrease in the Curie constant is explained by the increase in the loading density of potassium. Simultaneously, the increase in the magnetic susceptibility at 2 K is explained by the superparamagnetism of ferromagnetic domains. A possible mechanism of change in the magnetic properties is discussed.

Original languageEnglish
Pages (from-to)1016-1018
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Issue number2 SUPPL. PART 2
Publication statusPublished - Mar 2007
Externally publishedYes


  • Cluster
  • High pressure
  • Magnetic property
  • Zeolite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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