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Volume 6 Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212 Magnetic Materials 2018
October 22-23, 2018
October 22-23, 2018 | Rome, Italy
3rd International Conference on
Magnetism and Magnetic Materials
Potential of the NMR-in-magnetics technique in the study of local structure of various magnetic
materials
Vladimir V Matveev
Saint Petersburg State University, Russia
The lecture is devoted to nuclear magnetic resonance (NMR) in the magnetically ordered state of matter. The technique
is also known as NMR in magnetics or spin echo, or FNR. This method possesses a considerable potential for effective
investigation and testing of various magnetic materials, especially in the nanocrystalline and/or in nanocomposite state. In the
first part of the lecture an introduction is done to basic physics of pulse NMR in magnetics together with a brief description of
the method development since its appearance, about 60 years ago. The method was successfully applied to a lot of magnetics
such as metallic cobalt and cobalt-containing materials, including films, multilayers and nanoparticles; various ferro- and
ferrimagnetic compounds, Heusler alloys, intrinsically inhomogeneous perovskite-like CMR manganites etc. A number
of works of different years demonstrate that NMR technique was the useful addition to well known diagnostic methods of
magnetic materials and allowed one to get unique information. In the second part of the lecture we review applications of the
technique to some novel magnetic structures/materials during the last few decades. In particular, we describe a determination
of the core-shell structure of bimetallic FeCo nanoparticles, an observation of ferromagnetic clusters in spin-glass manganites
far above Curie temperature, molecular magnets i.e., array of molecular complexes with several 3d-metal ions, Mn-doped
magnetic semiconductors, and a detection of zero-field 13 C NMR signal in so-called magnetic carbon i.e., in carbon-based
magnetic materials free from metallic elements.
Recent Publications
1. Matveev V V et al. (2007) 139La NMR detection of ferromagnetic clusters far above the Curie temperature in
La0.7Ca 0.3Fe0.09Mn 0.91O3 spin-glass manganite. Journal of Physics Condensed Matter 19(22):226209.
2. Matveev V V et al. (2014) 13C NMR relaxation and reorientation dynamics in imidazolium-based ionic liquids: revising
interpretation. Physical Chemistry Chemical Physics 16:10480-10484.
3. Matveev V V et al. (2017) Investigation of melts of polybutylcarbosilane dendrimers by 1H NMR spectroscopy. Scientific
Reports 7:13710.
4. Markelov D A, Matveev V V et al. (2015) Determination of the hyperfine magnetic field in magnetic carbon-based
materials: DFT calculations and NMR experiments. Scientific Reports 5:14761.
5. Markelov D A, Shishkin A N, Matveev V V et al. (2016) Orientational mobility in dendrimer melts: molecular dynamics
simulations. Macromolecules 49:9247-9257.
Biography
Vladimir V Matveev has completed his PhD from Semenov Institute of Chemical Physics of USSR Academy of Sciences. He is a Senior Researcher of Department of
Nuclear-Physics Investigation Techniques of Saint Petersburg State University, Russia. He has published more than 25 papers in reputed journals and made a lot of
reports/lectures at international conferences.
Vladimir V Matveev, Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C6-029