Surface magnetic anisotropy of CoFe2O4 nanoparticles with a giant low-temperature hysteresis
Ferrimagnetic nanoparticles of CoFe2O4 about 4–16 nm in diameter were synthesized by pyrolysis of a mixture of Fe and Co acetylacetonates. The field dependences of magnetization and hysteresis loops were investigated in magnetic fields up to 4000 kA/m at various temperatures from 4.2 to 500 K. A con...
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| Veröffentlicht in: | Low temperature physics (Woodbury, N.Y.) N.Y.), 2013-04, Vol.39 (4), p.365-369 |
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| container_title | Low temperature physics (Woodbury, N.Y.) |
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| creator | Mozul', K. A. Ol'khovik, L. P. Sizova, Z. I. Bludov, A. N. Pashchenko, V. A. Baumer, V. N. Vashchenko, V. V. Kolosov, M. O. Kryshtal', A. P. Prodanov, M. F. |
| description | Ferrimagnetic nanoparticles of CoFe2O4 about 4–16 nm in diameter were synthesized by pyrolysis of a mixture of Fe and Co acetylacetonates. The field dependences of magnetization and hysteresis loops were investigated in magnetic fields up to 4000 kA/m at various temperatures from 4.2 to 500 K. A considerable contribution, positive or negative depending on the temperature, of “surface” anisotropy to the effective magnetic anisotropy of the nanoparticles was observed. A correlation was found between the magnetic properties that represent the specificity of small particles, namely, between “surface” anisotropy, magnetization, and high-field susceptibility. |
| doi_str_mv | 10.1063/1.4801993 |
| format | Article |
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| identifier | ISSN: 1063-777X |
| ispartof | Low temperature physics (Woodbury, N.Y.), 2013-04, Vol.39 (4), p.365-369 |
| issn | 1063-777X 1090-6517 |
| language | eng |
| recordid | cdi_crossref_primary_10_1063_1_4801993 |
| source | AIP Journals Complete |
| subjects | Anisotropy Hysteresis loops Magnetic anisotropy Magnetic fields Magnetic permeability Magnetic properties Magnetization Nanoparticles |
| title | Surface magnetic anisotropy of CoFe2O4 nanoparticles with a giant low-temperature hysteresis |
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