Magnetic field induced reversed (Negative) magnetization for electrochemically deposited Tc = 260 K Oxidized Films of Chromium Cyanide Magnets


  • We gratefully acknowledge support from the US National Science Foundation, Grant no. CHE-9320478, Department of Energy, Division of Materials Science, Grant no. DE-FG02-86ER45271.A000, Department of Energy, Division of Advanced Energy Projects, Grant no. DE-FG02-96ER12198, and the Office of Naval Research.


Molecule-based magnets with high ordering temperaturesTc (above room temperature) include some mixed-oxide hexacyanometallates. The example studied here, Cr2.12(CN)6 · ½ H2O (the Figure shows its crystalline and amorphous phases), is shown to have Tc equals; 260 K and exhibit negative (reverse) magnetization. An explanation is suggested for this behavior and the temperature and field dependences of the magnetization.

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