溶融Cuをフラックスとする新しい四元系化合物ErRh_2B_2C単結晶の合成及び物性

概要

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The single crystals of a new quaternary compound ErRh_2B_2C have been obtained as thin plates in an atmosphere of helium by the flux method using molten copper. The single crystals show golden-colored luster and the maximum size obtained is about 1.0 x 1.0 x 0.02 mm^3. This compound belongs to a tetragonal system and seems to be a derivative of ThCr_2Si_2 type; lattice parameter: a=0.36848 (2)nm, c=1.05520(3)nm, V= 1.4327 x 10-^28 m^3 and Z=2. The electrical resistivity parallel to the a-b plane decreases monotonically with decreasing temperature, but no superconductivity is observed down to 1.5K. The residual resistivity ratio, p (273 K) /p (1.5 K), is 1.38. Similar type new compounds of RRh_2B_2C were obtained for R=La-Er (except Eu and Tm) and Y by arc-melting synthetic method.
社団法人日本セラミックス協会の論文
1996-12-01