Solid solution VxFe1-x[TCNE]2•zCH2Cl2 room-temperature magnets

A family of amorphous, solid-solution magnets of VxFe1-x[TCNE](2).zCH(2)Cl(2) (TCNE = tetracyanoethylene; 0 less than or equal to x less than or equal to 1) composition has been characterized by IR spectrometry, elemental analysis, and magnetic measurements (ac and dc susceptibility). Substitution of Fe-II for V-II in V[TCNE](2).zCH(2)Cl(2) does not significantly alter the T-c for x greater than or equal to 0.3, which exceeds room temperature; however, H-cr is enhanced by over 2 orders of magnitude, indicating a large increase of random anisotropy. Hence, the magnetic properties of the room-temperature V[TCNE](2).zCH(2)Cl(2) magnet can be finely tuned via a synthetic chemistry methodology, making this material more amenable to future technologies.