Anomalous spin-pumping behavior of half-metallic ferromagnet/d-wave superconductor heterostructures
Researchers used spin-pumping experiments on half-metallic ferromagnet/d-wave superconductor heterostructures to study temperature-dependent Gilbert damping ($\alpha$). They found that the behavior of $\alpha$ below the superconducting transition temperature ($T_c$) critically depends on crystal orientation. While one orientation showed a drop in damping, the c-axis orientation exhibited a pronounced enhancement of damping, suggesting interfacial Andreev bound states dominate spin transport in this configuration.