Abstract
Longitudinal and transverse thermal Hall conductivity measurements are reported for the ab plane of a slightly underdoped (oxygen content 6.92±0.02) melt processed (Nd/Y)BCO intergrowth crystal below T c. The longitudinal thermal conductivity for this crystal is phonon dominated, with the data being not inconsistent with the existence of a two peak structure in the phononic thermal conductivity, and a quasiparticle peak giving rise to the ∼ T c/2 peak in the total thermal conductivity. Further, the maximum mean free path for the quasiparticles at ∼40 K is of the order 800 Å, which is significantly smaller than for polycrystalline and single crystal YBCO material, but consistent with ab-plane resistivity measurements.
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