ABOUT US

The head of the laboratory Assoc. Prof., Dr. Valeria Rodionova

Four hard-working Postdocs

Seven bright Ph.D. students

Ten curious students

Currently, the main topics and scientific directions of our laboratory are:

Bio-chemistry and nanotechnology Optical and magneto-optical spectroscopy

and magnetometry Novel magnetic materials for sensing and

logics applications

Smart materials and multiferroics Exchange bias and magnetic multilayers Magnetic MAX-phases Theory and micromagnetic modeling

E-Mail: rodionova@lnmm.ru Contact phone: +7-900-3468482

Two Adjunct Professors

The Laboratory of Novel Magnetic Materials was

established in June of 2013.

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DOUBLE DEGREE MASTER PRORGAM

Happy 2019’s Graduates

Immanuel Kant Baltic Federal University’s Laboratory of Novel Magnetic Materials welcomes you to enroll into our recently developed Master degree program “Functional Nanomaterials and Advanced Technologies”. This program contains three main sub-directions: nanomaterials for biomedicine, optics and photonics, & industrial applications The main benefits for our Master Students:

Double Russia-EU M.Sc. degree in Nanotechnology (Gdansk, Poland) and in Physics (Kaliningrad, Russia)

Personally-oriented learning plan Involvement in cutting-edge scientific research and international internships Comprehensive training in English Practical classes in modernly equipped laboratories Master’s thesis in the form of a scientific project or a start-up Excellent future career prospects in Russian or international companies

or research centers

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BIO-CHEMISTRY AND NANOTECHNOLOGY

A.S. Omelyanchik (2019), JMMM, 476, 387-391.

Bio-chemistry laboratory was established in 2019 to support ongoing interdisciplinary research on: Synthesis and characterization of magnetic nanoparticles, as well as their application in

biomedicine such as 3D-scaffolding of tissues and cells structures by using electromagnetic forces.

Complex studies of the magnetoelectric effect in the in-house designed and synthesized triple-component elastomers for their application as active biological interfaces which allows one to manipulate the growth, proliferation and differentiation of human neuronal stem cells in vitro.

Bio-chemical facility is equiped with: The biosafety cabinet CO2 incubator Cell counter Centrifuge Installation for Western Blot analysis

Chemical synthesis and surface modification methods: Co-precepitation in alkaline condition or high-boiling

organic solvents Sol-gel autocombustion synthesis Ligands exchange on NP's surfaces Reverse micelles synthesis under inert atmosphere /

low pressure

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OPTICAL AND MAGNETO-OPTICAL SPECTROSCOPY

AND MAGNETOMETRY

V.K. Belyaev (2019), JMMM,

482, 292-295 Within this scientific direction we explore how the optical and magneto-optical properties of thin film magnetic materials can be altered and controlled via surface nanostructuring. One particular area of interest is the physics of plasmon-polariton assisted magneto-optical effects in the magnetoplasmonic crystals and their potential applications in magnetic field sensor based on patterned made of noble/ferromagnetic multilayered nanostructures.

To perform this work, a custom-built experimental set-up with high flexibility and modular structure was assembled. This setup can also be used to perform spectroscopy and magnetometry measurements in visible and IR range with a beam-size focused down to 10 μm2.

We have demonstrated the DC magnetic field sensors based on magnetoplasmonic crystals. The correlation between magneto-optical and magnetic properties reveals the possibility to tune the sensitivity of the sensor by changing the ferromagnetic layer thickness. The sensitivity of our sensor prototype was found to be 3·10−6 Oe.

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MATERIALS FOR MAGNETIC SENSING AND

LOGICS APPLICATIONS

I. Baraban (2018), JMMM,

459, 61-65. This scientific direction is devoted to the experimental studies of magnetic properties of amorphous magnetic microwires and their assembles. Amorphous magnetically soft glass-coated microwires are of the particular interest for potential applications in encoding systems, magnetic field and stress sensors and biomedicine.

Magnetic properties and characteristics of the domain wall dynamics can be tuned by the variety of physical parameters. We aim to reveal and understand peculiarities of the micromagnetic structure and magnetic properties in order to find novel ways to control the domain wall dynamics.

The electromagnetic manipulator based on ferromagnetic microwires is being developed. This instrument can be used in combination with magnetic nanoparticles for three-dimensional movement of cells in vitro (for the formation of artificial tissue constructs) and in vivo cancer therapy (for local cell death induction). The first successful experimental attempts of the cell manipulation have already been demonstrated.

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SMART MATERIALS AND MULTIFERROICS

L.A. Makarova (2019), JMMM, 470, 89-92

Within this scientific direction we design, synthesize and explore a class of new functional materials, known as smart materials.

Novel electric- and magnetic- field-controllable materials, are of the broad interest for microelectronics, spintronics, energy conversion technologies and biomedicine. In particular, we study the materials that exhibit caloric and coupled caloric (multicaloric) effects from the point of view of their applicability in alternative solid-state cooling technologies. Another class of smart materials are shape memory alloys which have the ability to «memorize» or retain their previous geometric form when subjected to certain external stimuli such as heating, mechanical forces or magnetic field. We also fabricate and investigate multiferroic elastomers. This is a new class of materials consisting of a magnetic and piezoelectric micro- or nanoparticles embedded into the polymer matrix. Due to the elastic coupling between components with different nature the material exhibits multiferroic properties.

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EXCHANGE BIAS AND MAGENTIC

MULTILAYERS

C.A. Gritsenko (2019), JMMM,

475, 763-766

This scientific direction is related to the study of exchange coupled thin film structures that can be applied in spintronics and magnetic sensors. The model systems based on NiFe, IrMn, and FeMn alloys are found to be promising for non-linear detection. We study the magnetization reversal mechanisms as a function of the layer thicknesses, composition crystal structure and interface roughness.

By using the facilities available in our laboratory we can produce a high-quality thin film structures by means of the magnetron sputtering technique, perform the surface analysis using the atomic force microscopy as well as scanning electron microscopy and conduct a wide range of static and dynamic magnetic and transport experiments.

Up-to-date, we have shown how NiFe-IrMn interface morphology depends on the layer deposition sequence and NiFe composition. Also we have shown how the value and configuration of the external magnetic field applied during the sample deposition influences the exchange bias and magnetization reversal mechanisms in NiFe/IrMn bilayered structures.

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MAGNETIC MAX-PHASES

K. Sobolev (2019), JMMM, 10.1016/j.jmmm.2019.165642

This scientific direction is devoted to the complex study of magnetic and magnetotransport properties of MAX-phases – the unique class of nanolamellar materials which demonstrate a combination of metallic and ceramic properties. Magnetic behavior of Cr-containing MAX-phases is contradictory due to the impact of secondary phases and impurities. This influence is widely investigated in LNMM as magnetic MAX-phases may be applicable in the variety of field such as spintronics and magnetic sensing. We have an experimental possibility to perform a full cycle of MAX-phase investigation: from synthesis of samples in bulk (arc melting) and thin film (magnetron sputtering) forms, to their structural characterization by means of X-ray phase analysis and scanning electron microscopy, and magnetic characterization using a vibrating sample magnetometer.

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OUR EXPERIMENTAL SET-UPS

1. Lakeshore 7400 System Vibrating Sample Magnetometer Up to 1 × 10-7 emu noise floor High stability ±0.05% per day Fields up to 1.5 T Widest available temperature range – 77 K to 1273 K Autorotation option Magnetoresistance measurement option

2. ARCAST Arc and induction melting furnace Arc melting option Induction melting option Tilt casting with mold options (for arc melting) Continuous casting (for ingot production)

3. Magnetron sputtering system ORION-8-UHV (AJA Int.) Independent composition control of up to five elements; Deposition of oxides or nitrides In-situ substrate heating up to 850°C 10-8 Torr base pressure in the vacuum chamber

4. Differential Scanning Calorimeter Temperature range: 93-973 K T-sensor sensitivity: 3.2 μV/mW Cooling/Heating rate: 0.001 to 200 K/min Specific heat measurement range: 200-2000 J/kg*K

5. Thermogravimetric Analyzer NETZSCH TG 209 F3 Tarsus Temperature range: 248-1273 K Mass of the sample up to 2000 mg Resolution: 0.1 µg Heating and Cooling rates: 0.001 K/min to 100 K/min

HOME-BUILT EXPERIMENTS

1. Magneto-optical spectroscopy Wavelength range from 0.23 μm to 12 μm Different types of modulation of light beam Experiments in both transmission and reflection geometries AC and DC magnetic fields with magnitude up to 300 Oe Wide temperature range from 77 K to 500 K High flexibility provided by easy replacement of all modules

2. Magneto-electric effect Temperature range: 170-400 K DC magnetic field up to 500 Oe / AC – up to 10 Oe Frequency range: 0 – 200 kHz Sensitivity: – 1 mV

3. Magnetostriction coefficient measurements Max applied field: 50 Oe Length of sample: 70-80 mm Max resistance of sample: 1 kOhm Sensitivity: 10-8

4. Magnetocaloric effect measurements (MagEq MMS 902) Magnetic field change rate: from 0.25 to 6 T/s Temperature range: from 150 to 370 K Magnetic field range: -1.8 – +1.8 T

5. Magnetostriction properties measurements Magnetic field range with core: 0 – ±1.8 kOe Magnetic field change rate: from 0.25 Oe Range for piezoelectric and piezomagnetic module:

from 1 • 10-6 to 2000 • 10-6 С/N Sensitivity: 0.5 – 1 ppm

WE THANK OUR MAIN COLLABORATORS

Prof. Dino Fiorani’s group, ISM-CNR (Rome, Italy) Prof. Andrey Fedyanin’s group, Lomonosov Moscow State University (Moscow, Russia) Prof. Arkady Zhukov’s group, University of the Basque Country (San Sebastian, Spain) Prof. Nikolay Perov’s group, Department of Magnetism, Faculty of Physics, Moscow State

University (Moscow, Russia) Prof. Nikolai Chechenin’s group, Lomonosov Moscow State University, Skobeltsyn Institute of

Nuclear Physics (Moscow, Russia) Dr. Akhmed Aliev’s group, Amirkhanov Institute of Physics of Dagestan Scientific Center RAS

(Makhachkhala, Russia) Magnetic group of Tver State University (Tver, Russia) Prof. Claudio Sangregorio, ICCOM-CNR (Florence, Italy) Dr. Maxim Abakumov, National University of Science and Technology MISiS (Moscow,

Russia) Dr. Alexey Sokolov, Kirensky Institute of Physics RAS (Krasnoyarsk, Russia); Dr. Oleg Lunov, Institute of Physics ASCR (Prague, Czech Republic) Prof. Mitsuteru Inoue, Toyohashi University of Technology (Toyohashi, Japan) Prof. Manuel Vazquez, Institute of Materials Science (Madrid, Spain) Prof. Montserrat Rivas, University of Oviedo (Asturias, Spain) Prof. Rastislav Varga, Institute of Physics of Pavol Jozef Safarik University (Kosice, Slovakia) Prof. Oliver Guttfleisch’s group, Functional Materials,Technische Universität (Darmstadt,

Germany) Dr. Mikhail Volochaev, Kirensky Institute of Physics Federal Research Center KSC, Siberian

Branch Russian Academy of Sciences (Krasnoyarsk, Russia) Dr. Oleg Tretiakov, School of Physics, The University of New South Wales (Sydney,

Australia) Dr. Anna Pazniak, Institut PPRIME, Département de Physique et Mécanique des Matériaux

(Poitiers, France) Prof. Alexander Kamzin, Ioffe Physical-Technical Institute RAS (Saint Petersburg, Russia) Dr. Leonid Fetisov, Moscow Technical University MTU-MIREA (Moscow, Russia) Prof. Vladimir Khovaylo, NUST MISiS (Moscow, Russia) Dr. Michail Gorshenkov, NUST MISiS (Moscow, Russia) Dr. Dmitri Karpenkov, NUST MISiS (Moscow, Russia) Dr. Sonja Javonovic, Vinča Institute of Nuclear Sciences (Belgrade, Serbia) and Jožef Stefan

Institute (Ljubljana, Slovenia)

Photo by: Marina Gladysheva Photo by: Elena Buderkina