DOI: 10.1063/1.367952. Magnetically textured γ-Fe2O3 nanoparticles in a silica gel matrix: Structural and magnetic properties

Magnetically textured γ-Fe2O3 nanoparticles in a silica gel matrix: Structural and magnetic properties

10.1063/1.367952

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

This paper is devoted to magnetic and structural properties of anisotropic γ-Fe2O3 superparamagnetic particles dispersed in a transparent xerogel matrix. The effect of frozen anisotropy axes and magnetic texture, induced by a magnetic field applied during the solidification of the matrix on the in-field magnetization process, is studied by alternating gradient force magnetometry and first and second order magneto-optical effects. The changes of magnetization curves with respect to the ferrofluid solution at the same particle concentration are interpreted on the basis of an existing statistical approach extended to systems with particle size distribution, which has to be taken into account for real samples. A very good agreement between the experiment and theory was achieved for a log-normal distribution of diameters which well resembles that deduced from electron microscopy observations in different imaging modes. This structural analysis states the parameter values used in calculations and confirms the relevance of basic assumptions of the model for the specimens studied. The experimental results and the related theoretical discussion should be of use to understand magnetic properties of other magnetically textured superparamagnetic systems.

Bibliography

Bentivegna, F., FerrÃ©, J., NÃ½vlt, M., Jamet, J. P., Imhoff, D., Canva, M., Brun, A., Veillet, P., ViÅ¡ÅovskÃ½, Å ., Chaput, F., & Boilot, J. P. (1998). Magnetically textured Î³-Fe2O3 nanoparticles in a silica gel matrix: Structural and magnetic properties. Journal of Applied Physics, 83(12), 7776â7788.

Authors 11

F. Bentivegna (first)
J. Ferré (additional)
M. Nývlt (additional)
J. P. Jamet (additional)
D. Imhoff (additional)
M. Canva (additional)
A. Brun (additional)
P. Veillet (additional)
Š. Višňovský (additional)
F. Chaput (additional)
J. P. Boilot (additional)

References 40 Referenced 58

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10.1016/0304-8853(94)90207-0 / J. Magn. Magn. Mater. (1994)
10.1103/PhysRevB.53.14291 / Phys. Rev. B (1996)
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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 9:53 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 6:10 p.m.)
Indexed	1 month, 4 weeks ago (July 7, 2025, 9:06 a.m.)
Issued	27 years, 2 months ago (June 15, 1998)
Published	27 years, 2 months ago (June 15, 1998)
Published Print	27 years, 2 months ago (June 15, 1998)

Funders 0

None

BibTeX

@article{Bentivegna_1998, title={Magnetically textured γ-Fe2O3 nanoparticles in a silica gel matrix: Structural and magnetic properties}, volume={83}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.367952}, DOI={10.1063/1.367952}, number={12}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Bentivegna, F. and Ferré, J. and Nývlt, M. and Jamet, J. P. and Imhoff, D. and Canva, M. and Brun, A. and Veillet, P. and Višňovský, Š. and Chaput, F. and Boilot, J. P.}, year={1998}, month=jun, pages={7776–7788} }

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      "URL": "https://pubs.aip.org/jap/article/83/12/7776/180559/Magnetically-textured-Fe2O3-nanoparticles-in-a"
    }
  },
  "subtitle": [],
  "short-title": [],
  "issued": {
    "date-parts": [
      [
        1998,
        6,
        15
      ]
    ]
  },
  "references-count": 40,
  "journal-issue": {
    "issue": "12",
    "published-print": {
      "date-parts": [
        [
          1998,
          6,
          15
        ]
      ]
    }
  },
  "URL": "http://dx.doi.org/10.1063/1.367952",
  "relation": {},
  "ISSN": [
    "0021-8979",
    "1089-7550"
  ],
  "subject": [],
  "published-other": {
    "date-parts": [
      [
        1998,
        6,
        15
      ]
    ]
  },
  "published": {
    "date-parts": [
      [
        1998,
        6,
        15
      ]
    ]
  }
}