Morphologically Templated Growth of Aligned Spinel CoFe₂ O₄ Nanorods

Uniaxially aligned CoFe₂ O₄ nanorods are obtained by coprecipitation of Co²⁺ , Fe²⁺ , and C₂ O₄ ^2- ions in a microemulsion solution, and subsequent high-temperature decomposition of CoFe₂ (C₂ O₄ )₃ . Each nanorod is made up of a "tectonic" assembly of CoFe₂ O₄ nanocrystals. Magnetization of such CoFe₂ O₄ materials may lead to their use in high-density magnetic recording media and high-performance electromagnetic and spintronic devices.