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

F. Moro; R. De Miguel; M. Jenkins; C. Gómez-Moreno; D. Sells; F. Tuna; E. J L McInnes; A. Lostao; F. Luis; J. Van Slageren

doi:10.1016/j.jmmm.2014.02.053

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

F. Moro, R. De Miguel, M. Jenkins, C. Gómez-Moreno, D. Sells, F. Tuna, E. J L McInnes, A. Lostao, F. Luis, J. Van Slageren

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	188-196
Number of pages	8
Journal	Journal of Magnetism and Magnetic Materials
Volume	361
DOIs	https://doi.org/10.1016/j.jmmm.2014.02.053
Publication status	Published - 2014

Keywords

Electron magnetic resonance
Magnetic anisotropy
Magnetoferritin
SQUID

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10.1016/j.jmmm.2014.02.053

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@article{28c1b62d776249929bc4d35895606bc3,

title = "Magnetic anisotropy of polycrystalline magnetoferritin investigated by SQUID and electron magnetic resonance",

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. {\textcopyright} 2014 Elsevier B.V.",

keywords = "Electron magnetic resonance, Magnetic anisotropy, Magnetoferritin, SQUID",

author = "F. Moro and {De Miguel}, R. and M. Jenkins and C. G{\'o}mez-Moreno and D. Sells and F. Tuna and McInnes, {E. J L} and A. Lostao and F. Luis and {Van Slageren}, J.",

year = "2014",

doi = "10.1016/j.jmmm.2014.02.053",

language = "English",

volume = "361",

pages = "188--196",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Magnetic anisotropy of polycrystalline magnetoferritin investigated by SQUID and electron magnetic resonance

AU - Moro, F.

AU - De Miguel, R.

AU - Jenkins, M.

AU - Gómez-Moreno, C.

AU - Sells, D.

AU - Tuna, F.

AU - McInnes, E. J L

AU - Lostao, A.

AU - Luis, F.

AU - Van Slageren, J.

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

KW - Electron magnetic resonance

KW - Magnetic anisotropy

KW - Magnetoferritin

KW - SQUID

U2 - 10.1016/j.jmmm.2014.02.053

DO - 10.1016/j.jmmm.2014.02.053

M3 - Article

SN - 0304-8853

VL - 361

SP - 188

EP - 196

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

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

Abstract

Keywords

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