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Nanostructuring is one of the effective approaches to lower the thermal conductivity of materials. Nanostructured skutterudite-related compounds CoSb3, Fe0.5Ni0.5Sb3, Fe0.25Ni0.25Co0.5Sb3 and Te-doped CoSb3 were synthesized by a solvothermal route. The bulk materials were prepared by hot pressing or spark plasma sintering from the solvothermally synthesized nanopowders. The thermal conductivity values...
The dynamical properties of magnetic flux in high-Tc oxide superconductors were investigated in magnetic fields of up to 11 kOe by means of torque magnetometry. A discontinuous jump in the magnetic torque was observed when the rotation of a magnet was stopped. The magnetic torque then decreased in proportion to the logarithm of time. The results are interpreted in terms of damping and flux creep effects.
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