Ferromagnetism of potassium metal under pressure loading into zeolite low-silica X

Shingo Araki, Nguyen Hoang Nam, Kota Shimodo, Takehito Nakano, Yasuo Nozue

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Abstract

Potassium metal was loaded into K-form zeolite low-silica X (LSX) under the loading pressure P up to 1.5 GPa. A ferromagnetism is observed at P≈ 0.9 GPa below 13 K. The loading density of K atom n is estimated to be ≈15 per cage at the ferromagnetic loading pressure, and the pressure-derivative loading density dn/dP has a remarkable peak ≈11GPa-1 at P≈0.95 GPa. The density of states at the Fermi energy is estimated to be ≈46 states/eV per cage from the value of dn/dP on a simple model. The observed ferromagnetism is discussed in terms of the Stoner condition and the theory of the revised Rhodes-Wohlfarth plot.

Original languageEnglish
Article number094403
JournalPhysical Review B
Volume99
Issue number9
DOIs
Publication statusPublished - Mar 4 2019

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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