25th International Symposium of Metastable, Amorphous and Nanostructured Materials (ISMANAM 2018)

Date: 2 to 6 July, 2018

Rome, Italy

PhD-student of LNMM Alexander Omelyanchik took part on organization of the 25th International Symposium of Metastable, Amorphous and Nanostructured Materials (ISMANAM 2018) which was held from 2 to 6 July in Rome. As well he presented his work entitled “Magnetic properties of core/shell manganese oxide nanoparticles before and after degradation in water”.

Poster session:

In this work, magnetic properties of L-DOPA stabilized core/shell Mn3O4/MnO nanoparticles were investigated during the process of degradation [1-2]. The as prepared Mn3O4/MnO core/shell system demonstrates a low temperature magnetization reversal that is strongly affected by the presence of the MnO shell. As results, the finite coercivity slightly above the Curie temperature of the Mn3O4 phase, the horizontal displacement of the FC-hysteresis loop as well as the existence of a frustrated interfacial region determining the low temperature irreversibility were observed. On the other hand, the magnetic behavior of the aged system is dominated by the presence of Mn3O4 whose highly anisotropic character (i.e. high coercivity and high magnetization remanence) is attributed to the presence of a large fraction of surface spins. Such result is consistent with the structural evolution, from core/shell to hollow nanoparticles, as shown by TEM observation.

[1] B.H. McDonagh, G. Singh, S. Hak, S. Bandyopadhyay, I.L. Augestad, D. Peddis, et al., Small. 12, 301 (2016).
[2] A. Omelyanchik, G. Singh, B.H. McDonagh, V. Rodionova, D. Fiorani, D. Peddis, et al., Nanotechnology.
29(5), 055703 (2018).


A. Omelyanchik1, G. Singh2, B.H. McDonagh3, V. Rodionova1, D. Fiorani 4, D. Peddis 4, S. Lauretti 4

Center For Functionalized Magnetic Materials (FunMagMa), Immanuel Kant Baltic Federal University, Kaliningrad, 236041 Russia

Department of Materials Engineering, Norwegian University of Science and Technology (NTNU), 7491, Trondheim, Norway)

Ugelstad Laboratory, Dept. Of Chemical Engineering, Norwegian University of Science and Technology (NTNU)

Istituto di Struttura della Materia-CNR, 00015 Monterotondo Scalo (RM)


Correspondence to: asomelyanchik@kantiana.ru

Immanuel Kant Baltic Federal University,

Gaidara 6, Kaliningrad, 236022, Russia

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11th International Conference of Electrical, Transport, and Optical Properties on Inhomogeneous Media

Date: July 16-20, 2018

Krakow, Poland

Victor Belyaev attended 11th International Conference of Electrical, Transport, and Optical Properties on Inhomogeneous Media which was held in Krakow, Poland, July 16-20, 2018

Poster session:

Development of magnetic field sensors is primarily focused on improvement of sensors design and its characteristics – sensitivity, resolution, locality and reliability. One of the modern topics is using magnetic field sensors in biomedical applications which require precision measurements of magnetic field with magnitude of 1 μOe.1 The sensitivity of sensors based on magneto-optical (MO) effects in reflection geometry is not enough for measuring low magnitudes but it can be increased by excitation of surface plasmon-polaritons on metal-dielectric interface which leads to appearance of resonant MO effects. 2,3 Using magnetoplasmonic crystals – multilayer structures fabricated of noble and ferromagnetic layers on substrate with 1D diffraction grating – allows enhancing MO effects and makes possible one to design a DC magnetic field sensor with high sensitivity at a spot of 5 μm2. The sensor measures the DC magnetic field component parallel to controllable the AC magnetic field while the shift of optical beam reveals the magnetic field distribution in the desired volume. The enhanced transversal MO Kerr effect, achieved due to excitation of SPPs, allows detecting magnetic field with sensitivity up to 10−6 Oe.

[1] L. Marmugi, F. Renzoni, Optical Magnetic Induction Tomography of the Heart, Sci. Rep. 2016, 6, 23962.
[2] A.A. Grunin, A.G. Zhdanov, A.A. Ezhov, E.A. Ganshina, A.A. Fedyanin, Transversal magneto-optical Kerr effect in two-dimensional nickel magnetoplasmonic crystals, Appl. Phys. Lett. (2010), 97, 261908.
[3] A.V. Chetvertukhin, T.V. Dolgova, H. Uchida, M. Inoue, A.A. Fedyanin, J., Magneto-optical Kerr effect enhancement at the Wood’s anomaly in magnetoplasmonic crystals, Magn. Magn. Mater., 2012, 324, 3516.


V.K. Belyaev1, V.V. Rodionova1, A.A. Grunin2, A.A. Fedyanin2

Center For Functionalized Magnetic Materials (FunMagMa), Immanuel Kant Baltic Federal University, Kaliningrad, 236041 Russia

Magnetism Department, Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991 Russia


Correspondence to: v.k.belyaev@gmail.com

Immanuel Kant Baltic Federal University,

Gaidara 6, Kaliningrad, 236022, Russia

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