Huang Yan, Li Jian, Li Feng. Influence of the Magneto-structure of CoFe2O4 Self-formed Ferrofluid on Its Magnetization[J]. Chinese Journal of Chemical Physics , 2005, 18(4): 585-588. doi: 10.1088/1674-0068/18/4/585-588
Citation: Huang Yan, Li Jian, Li Feng. Influence of the Magneto-structure of CoFe2O4 Self-formed Ferrofluid on Its Magnetization[J]. Chinese Journal of Chemical Physics , 2005, 18(4): 585-588. doi: 10.1088/1674-0068/18/4/585-588

Influence of the Magneto-structure of CoFe2O4 Self-formed Ferrofluid on Its Magnetization

doi: 10.1088/1674-0068/18/4/585-588
Funds:  Project supported by the Fund of Natural Science of Chongqing City.
  • Received Date: 2004-06-04
  • The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.
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Influence of the Magneto-structure of CoFe2O4 Self-formed Ferrofluid on Its Magnetization

doi: 10.1088/1674-0068/18/4/585-588
Funds:  Project supported by the Fund of Natural Science of Chongqing City.

Abstract: The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.

Huang Yan, Li Jian, Li Feng. Influence of the Magneto-structure of CoFe2O4 Self-formed Ferrofluid on Its Magnetization[J]. Chinese Journal of Chemical Physics , 2005, 18(4): 585-588. doi: 10.1088/1674-0068/18/4/585-588
Citation: Huang Yan, Li Jian, Li Feng. Influence of the Magneto-structure of CoFe2O4 Self-formed Ferrofluid on Its Magnetization[J]. Chinese Journal of Chemical Physics , 2005, 18(4): 585-588. doi: 10.1088/1674-0068/18/4/585-588

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