Molecular magnets V(tetracyanoethylene)x⋅y(solvent): Applications to magnetic shielding

The specific advantages and limitations of a new class of polymer based magnets [exemplified by V(TCNE)x⋅y(solvent) (TCNE=tetracyanoethylene)] for static and low frequency magnetic shielding and inductive applications are evaluated using results of dc superconducting quantum interference device magnetization and ac permeability measurements. Present materials have very low density (ρ∼1 g/cm3), relatively high resistivity (∼104 Ω cm), and low power loss (as low as ∼2 erg cm−3 cycle−1). The highest initial room temperature permeability observed to date (for solvent=CH2Cl2) of μi=13 is modest for practical applications. Flexible processing methods are suggested for optimization of magnetic properties important for shielding applications.