What is it about?
Cobalt ferrite is a ferrimagnetic oxide material of cobalt and iron having the formula CoFe2O4. This work describes the changes in the physical dimensions of compacts made of cobalt ferrite powders when an external magnetic field is applied and the phenomenon is called magnetostriction. Very large value of magnetostriction coefficient is reported for the first time for sintered polycrystalline cobalt ferrite for compacts made from nanoparticles.
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Why is it important?
Magnetostrictive materials are useful for sensors and actuators. For such applications, high magnetostriction coefficient is required and the materials should be cheap. For the first time, very high magnetostriction coefficient is reported for an oxide material, using nanoparticles.
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This page is a summary of: High magnetostriction and coupling coefficient for sintered cobalt ferrite derived from superparamagnetic nanoparticles, Applied Physics Letters, August 2012, American Institute of Physics,
DOI: 10.1063/1.4745922.
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