Unusual composition dependence of magnetic relaxation for Co<STACK><ABOVE>II</ABOVE><BELOW>1−x</BELOW></STACK>Ni<STACK><ABOVE>II</ABOVE><BELOW>x</BELOW></STACK> chain-based metal–organic frameworks.

A series of isomorphous 3D CoSTACKABOVEII/ABOVEBELOW1−x/BELOW/STACKNiSTACKABOVEII/ABOVEBELOWx/BELOW/STACK MOFs based on ferromagnetic chains show SCM-type slow relaxation and the Co-rich system can exhibit a higher blocking temperature than both CoII and NiII parent materials. [ABSTRACT FROM AUTHOR]