Silicon clathrate with an f-electron system.
A novel crystal of Ba6Ce2Au4Si42 with Ba and Ce encapsulated into silicon-polyhedral clusters is self-assembled from the state of elemental mixture. Each atom in the crystal is arranged in its well-defined position with a nanoscale period, causing unique interactions between the conduction and the magnetic electrons originating from the independent sources of Ba and Ce, respectively. In this system, the long-distant magnetic f electrons can interact with each other through nanoscale spacing with isotropic three dimensionality, leading to the occurrence of a unique spontaneous spin ordering at 6.5 K.
Kawaguchi
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Department of Material Science, Faculty of Science, Osaka-city University, 3-3-138 Sugimoto, Sumiyoshi-ku, 558-8585 Osaka, Japan.
Tanigaki
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Yasukawa
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