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Crystal Growth and Magnetic Properties of Rare Earth Borosilicides by Mori, Takao is a Materials Science article available to read on EtoBox.

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## Abstract B~12~ icosahedra cluster-containing rare earth borosilicides REB~44~Si~2~ (RE = Tb, Dy, Ho, Er, Tm, Yb) were grown by the floating zone method and their physical properties were investigated. REB~44~Si~2~ compounds are isostructural to REB~50~ and they are unique among the newly discovered boron-rich phases in that it is possible to grow large crystals with dimensions exceeding 10 mm. The rare earth atoms form a coupled chain structure like a ladder along the __c__-axis which is also the axis along which there is a B~12~ icosahedral chain. Magnetic properties, resistivity, and specific heat of the compounds were investigated. The conductivity follows the 3D variable range hopping mechanism and it was determined that localization lengths __ξ__ are extremely short, actually close to the distances of the atoms themselves. Magnetic transitions above 4 K are indicated for all the compounds except for TmB~44~Si~2~ and it is found that specific heat measurement is the expedient probe of such compounds in which the low temperature susceptibility is influenced by external conditions such as crystal growth rate. Despite dimer-like features to the magnetic transition a spin gap is

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Author

Mori, Takao

Publisher

Oldenbourg Wissenschaftsverlag; Walter de Gruyter GmbH (ISSN 2194-4946)

Published

2006

Language

EN

Field

Materials Science (Physical Sciences)