Magnetoferritin molecules with an average inorganic core diameter of 5.7±1.6 nm and polycrystalline internal structure were investigated by a combination of transmission electron microscopy, magnetic susceptibility, magnetization, and electron magnetic resonance (EMR) experiments. The temperature and frequency dependence of the magnetic susceptibility allowed for the determination of the magnetic anisotropy on an experimental time scale which spans from seconds to nanoseconds. In addition, angle-dependent EMR experiments were carried out for the determination of the nanoparticle symmetry and internal magnetic field. Due to the large surface to volume ratio, the nanoparticles show larger and uniaxial rather than cubic magnetic anisotropies compared to bulk maghemite and magnetite. © 2014 Elsevier B.V

Moro, F., De Miguel, R., Jenkins, M., Gómez-Moreno, C., Sells, D., Tuna, F., et al. (2014). Magnetic anisotropy of polycrystalline magnetoferritin investigated by SQUID and electron magnetic resonance. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 361, 188-196 [10.1016/j.jmmm.2014.02.053].

Magnetic anisotropy of polycrystalline magnetoferritin investigated by SQUID and electron magnetic resonance

Moro, F.;
2014

Abstract

Magnetoferritin molecules with an average inorganic core diameter of 5.7±1.6 nm and polycrystalline internal structure were investigated by a combination of transmission electron microscopy, magnetic susceptibility, magnetization, and electron magnetic resonance (EMR) experiments. The temperature and frequency dependence of the magnetic susceptibility allowed for the determination of the magnetic anisotropy on an experimental time scale which spans from seconds to nanoseconds. In addition, angle-dependent EMR experiments were carried out for the determination of the nanoparticle symmetry and internal magnetic field. Due to the large surface to volume ratio, the nanoparticles show larger and uniaxial rather than cubic magnetic anisotropies compared to bulk maghemite and magnetite. © 2014 Elsevier B.V
Articolo in rivista - Articolo scientifico
Electron magnetic resonance; Magnetic anisotropy; Magnetoferritin; SQUID; Electronic, Optical and Magnetic Materials; Condensed Matter Physics
English
2014
361
188
196
none
Moro, F., De Miguel, R., Jenkins, M., Gómez-Moreno, C., Sells, D., Tuna, F., et al. (2014). Magnetic anisotropy of polycrystalline magnetoferritin investigated by SQUID and electron magnetic resonance. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 361, 188-196 [10.1016/j.jmmm.2014.02.053].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/210613
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