MISC

2013年8月

Exotic magnetism of s-electron cluster arrays: Ferromagnetism, ferrimagnetism and antiferromagnetism

Journal of the Korean Physical Society
  • Takehito Nakano
  • ,
  • Duong Thi Hanh
  • ,
  • Yasuo Nozue
  • ,
  • Nguyen Hoang Nam
  • ,
  • Truong Cong Duan
  • ,
  • Shingo Araki

63
3
開始ページ
699
終了ページ
705
記述言語
英語
掲載種別
DOI
10.3938/jkps.63.699

Alkali metal nanoclusters can be stabilized in the regular cages of zeolite crystals by the loading of guest alkali metals. Cages are connected by the sharing of windows of the framework, and arrayed in simple cubic, diamond and body centered cubic structures in zeolites A, X and sodalite, respectively. The s-electrons have the localized nature of nanoclusters with magnetic moments, and have mutual interactions through the windows of cages. They show exotic magnetism depending on the structure type of zeolites, the kind of alkali metals and the average loading density of alkali atoms per cage. In zeolite A, potassium clusters are formed in α-cages that have an inside diameter of 11 Å. They exhibit ferromagnetic properties explained by the canted antiferromagnetism of the Mott insulator, where the 1p-like degenerate orbitals of clusters play an essential role in the magnetic properties. Na-K alloy clusters generated at supercages and β-cages of low-silica X (LSX) zeolite exhibit Néel's N-type ferrimagnetism at specific loading densities of alkali metals. Alkali metal clusters in sodalite show the ideal Heisenberg antiferromagnetism of the Mott insulator. © 2013 The Korean Physical Society.

リンク情報
DOI
https://doi.org/10.3938/jkps.63.699
ID情報
  • DOI : 10.3938/jkps.63.699
  • ISSN : 0374-4884
  • ISSN : 1976-8524
  • SCOPUS ID : 84882937274

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