When substituted for Ru in the ferromagnetic superconductor RuSr 2 GdCu 2 O 8 , both Sn 4+ and Nb 5+ suppress the ferromagnetism in the RuO 2 layers, but they respectively enhance and diminish superconductivity in the CuO 2 planes through hole transfer to and from the CuO 2 layers, showing that these materials are underdoped with an estimated maximum T c of 65 ± 10 K.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.