Eur. Phys. J. D 43, 267-270 (2007)
https://doi.org/10.1140/epjd/e2007-00065-1

Electronic properties of arrayed K clusters in zeolite LTA with Si/Al = 1.5

¹ National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba, 305-8565, Ibaraki, Japan
² PRESTO, Japan Science and Technology Corporation (JST), Kawaguchi City Saitama, 332-0012, Japan

Corresponding author: ^a kodaira-t@aist.go.jp

Received: 24 July 2006
Published online: 24 May 2007

Abstract

Arrayed cationic K clusters including one 4s-electron in each cluster, i.e., K_m+1^m+, were incorporated into α-cages of zeolite LTA with Si/Al=1.5. Although no magnetic phase transition was observed regarding the temperature (T) dependence of magnetic susceptibilities originating from the 4s-electron spins (χ_spin) between 2 and 300 K, the χ_spin-T curve could be fitted by the sum of magnetic susceptibilities based on the Curie-Weiss law and Pauli paramagnetism. A possible explanation of this behavior is the existence of a narrow energy band formed out of 1s-cluster orbitals of arrayed K clusters, and the existence of a finite density of state at the Fermi energy.