Neutron magnetic scattering studies on ferromagnetism in potassium nanoclusters arrayed in zeolite A-Trial experiments

T. Nakano, T. Takase, S. Araki, T. Kamiyama, Y. Nozue, S. Ikeda

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2 Citations (Scopus)

Abstract

Potassium clusters arrayed in zeolite A are known to show ferromagnetic properties at low temperature. The origin of the spontaneous magnetization has been explained by a model of spin-canting in an antiferromagnetically ordered state. The direct information for the magnetic structure, however, has not been obtained so far. In the present work, we measure the neutron powder diffraction by using pulsed neutron source at KEK-KENS below and above the Curie temperature. No significant temperature-dependence was, however, obtained within the statistical errors, namely, magnetic scattering could not be detected separately. We also estimate the intensity of magnetic scattering by assuming some possible magnetic structures with considering the magnetic form factor of the cluster wave function. The intensity of magnetic scattering is estimated to be extremely weak and higher S/N of ∼104 or more is required to detect the magnetic scattering of this material.

Original languageEnglish
Pages (from-to)240-242
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume600
Issue number1
DOIs
Publication statusPublished - Feb 21 2009
Externally publishedYes

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Keywords

  • Alkali metal cluster
  • Ferromagnetism
  • Neutron magnetic scattering
  • Zeolite

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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