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Properties and Applications of Nanocrystalline Alloys from Amorphous Precursors pp 253–266Cite as

Magnetic Properties of Nanostructured Materials

Monte Carlo Simulation and Experimental Approach for Nanocrystalline Alloys and Core-Shell Nanoparticles

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Part of the book series: NATO Science Series ((NAII,volume 184))

Abstract

The magnetic properties of FINEMET-type nanocrystalline alloys and isolated ferromagnetic AgCo nanoparticles are investigated both experimentally and numerically. Theoretical models of spins that simulate ideal nanocrystalline alloys and isolated nanoparticles are considered while their magnetic properties are derived from Monte Carlo simulation of low-temperature spin ordering. Interesting features such as magnetic polarization of the matrix due to penetrating fields arising from nanograins and the role played by the crystalline fraction in the overall magnetic behaviour, in the case of nanocrystalline alloys are investigated. For isolated nanoparticles it is shown that the competition between surface and bulk anisotropy gives rise to surface spin disorder that, together with finite-size effects, is responsible for the experimentally observed lack of saturation of the magnetization in high applied fields. These simulation results are confirmed by experimental data obtained on FINEMET nanocrystalline alloys and isolated ferromagnetic AgCo colloidal nanoparticles.

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Author information

Authors and Affiliations

  1. National Institute for Materials Physics, P.O. Box MG-7, 76900, Bucharest, Romania

    O. Crisan

  2. Department of Physics, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece

    O. Crisan, A.D. Crisan, M. Angelakeris & N.K. Flevaris

  3. LPEC, UMR 6087 CNRS, Université du Maine, 72085, Le Mans, France

    J.-M. Greneche, Y. Labaye & L. Berger

  4. GPM, UMR 6634 CNRS, Université de Rouen, 76801, St. Etienne du Rouvray, France

    J.M. LeBreton

Authors
  1. O. Crisan
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  2. J.-M. Greneche
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  3. Y. Labaye
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  4. L. Berger
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  5. A.D. Crisan
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Editor information

Editors and Affiliations

  1. Institute of Molecular Physics, Polish Academy of Sciences, Poznarń, Poland

    Bogdan Idzikowski

  2. Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia

    Peter Švec

  3. Department of Nuclear Physics and Technology, Slovak University of Technology, Bratislava, Slovakia

    Marcel Miglierini

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© 2005 Kluwer Academic Publishers

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Crisan, O. et al. (2005). Magnetic Properties of Nanostructured Materials. In: Idzikowski, B., Švec, P., Miglierini, M. (eds) Properties and Applications of Nanocrystalline Alloys from Amorphous Precursors. NATO Science Series, vol 184. Springer, Dordrecht. https://doi.org/10.1007/1-4020-2965-9_23

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