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Structural and Magnetic Investigations of Ferromagnets by NMR. Application to Magnetic Metallic Multilayers

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Frontiers in Magnetism of Reduced Dimension Systems

Part of the book series: NATO ASI Series ((ASHT,volume 49))

Abstract

Spectroscopies based on hyperfine interactions such as Nuclear Magnetic Resonance (or Mössbauer effect, Perturbed Angular Correlation,…) use nuclei as local probes of the magnetic (or electric) properties of the electrons on their site and in the close vicinity. Their basic yield is the strength of the magnetic hyperfine field HF or the electric field gradient EFG acting on nuclei in the material. As such HF and EFG data are of fundamental interest although a comparison with theory involves heavy calculations. Their origin will not be discussed in details here. The emphasis will be put rather on the information one can get about the local structure and magnetic properties of metallic systems, magnetic multilayers and thin films, without going into detailed electronic structure calculations. Indeed the hyperfine field HF, the electric field gradient EFG are brought about by the spatial distribution of charges and magnetic moment around the observed nucleus and, thus, they are signatures of the various topological, chemical and magnetic environments in the material. In this chapter, the stress is put only on the magnetic hyperfine interaction1 and its distribution in the sample, in short, the NMR spectrum. This spectrum contains the relevant information for sample characterization: chemical and topological short range order, local moments and magnetic anisotropy.

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  1. Institut de Physique et Chimie des Matériaux, 23 rue du Loess, 67037, Strasbourg, France

    P. Panissod

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  1. Institute of Magnetism of National Academy of Sciences of Ukraine, 36b Vernadski Srt., 252142, Kiev, Ukraine

    Victor G. Bar’yakthar  & Natalia A. Lesnik  & 

  2. Department of Physics, Ohio State University, 174W. 18th Avenue, 43210-1106, Columbus, Ohio, USA

    Philip E. Wigen

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Panissod, P. (1998). Structural and Magnetic Investigations of Ferromagnets by NMR. Application to Magnetic Metallic Multilayers. In: Bar’yakthar, V.G., Wigen, P.E., Lesnik, N.A. (eds) Frontiers in Magnetism of Reduced Dimension Systems. NATO ASI Series, vol 49. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-5004-0_10

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