Electronic properties of arrayed K clusters in zeolite LTA with Si/Al = 1.5
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 email@example.com
Published online: 24 May 2007
Arrayed cationic K clusters including one 4s-electron in each cluster, i.e., Km+1m+, 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 (χspin) between 2 and 300 K, the χspin-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.
PACS: 82.75.Vx – Clusters in zeolites / 73.22-.f – Electronic structure of nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2007