Cobalt ferrite: Difference between revisions
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| IUPACName = cobalt(2+);iron(3+);oxygen(2-) |
| IUPACName = cobalt(2+);iron(3+);oxygen(2-) |
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Revision as of 12:37, 30 January 2021
| Names | |
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| IUPAC name
cobalt(2+);iron(3+);oxygen(2-)
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| EC Number |
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PubChem CID
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| Properties | |
| CoFe2O4 | |
| Molar mass | 234.619 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cobalt ferrite ,is a semi-hard ferrites with the chemical formula of CoFe2O4 (CoO·Fe2O3). The substance can be considered as between soft and hard magnetic material and is usually classified as a semi-hard material.[1]
Applications
It is mainly used for its magnetostrictive applications like sensors and actuators [2] thanks to its high saturation magnetostriction (~200 ppm). CoFe2O4 has also the benefits to be rare-earth free, which makes it a good substitute for Terfenol-D.[3] Moreover, its magnetostrictive properties can be tuned by inducing a magnetic uniaxial anisotropy.[4] This can be done by magnetic annealing,[5] magnetic field assisted compaction,[6] or reaction under uniaxial pressure.[7] This last solution has the advantage to be ultra fast (20 min) thanks to the use of spark plasma sintering. The induced magnetic anisotropy in cobalt ferrite is also beneficial to enhance the magnetoelectric effect in composite.[8]
See also
References
- ^ Hosni (2016). "Semi-hard magnetic properties of nanoparticles of cobalt ferrite synthesized by the co-precipitation process". Journal of Alloys and Compounds. 694: 1295–1301. doi:10.1016/j.jallcom.2016.09.252.
- ^ Olabi (2008). "Design and application of magnetostrictive materials" (PDF). Materials & Design. 29 (2): 469–483. doi:10.1016/j.matdes.2006.12.016.
- ^ Sato Turtelli; et al. (2014). "Co-ferrite – A material with interesting magnetic properties". Iop Conference Series: Materials Science and Engineering. 60: 012020. doi:10.1088/1757-899X/60/1/012020.
- ^ J. C. Slonczewski (1958). "Origin of Magnetic Anisotropy in Cobalt-Substituted Magnetite". Physical Review. 110 (6): 1341–1348. doi:10.1103/PhysRev.110.1341.
- ^ Lo (2005). "Improvement of magnetomechanical properties of cobalt ferrite by magnetic annealing". IEEE Transactions on Magnetics. 41 (10): 3676–3678. doi:10.1109/TMAG.2005.854790. S2CID 45873667.
- ^ Wang (2015). "Magnetostriction properties of oriented polycrystalline CoFe2O4". Journal of Magnetism and Magnetic Materials. 401: 662–666. doi:10.1016/j.jmmm.2015.10.073.
- ^ Aubert, A. (2017). "Uniaxial anisotropy and enhanced magnetostriction of CoFe2O4 induced by reaction under uniaxial pressure with SPS". Journal of European Ceramic Society. 37 (9): 3101–3105. arXiv:1803.09656. doi:10.1016/j.jeurceramsoc.2017.03.036. S2CID 118914808.
- ^ Aubert, A. (2017). "Enhancement of the Magnetoelectric Effect in Multiferroic CoFe2O4/PZT Bilayer by Induced Uniaxial Magnetic Anisotropy". IEEE Transactions on Magnetics. 53 (11): 1–5. arXiv:1803.09677. doi:10.1109/TMAG.2017.2696162. S2CID 25427820.
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