III International Workshop Dzyaloshinskii-Moriya Interaction and Exotic Spin Structures

26-30 June 2015 Pskov, Russia

Program

International workshop «Dzyaloshinskii-Moriya Interaction and Exotic Spin Structures»
Programm DMI 2015.pdf


Session 1. Crystal handedness and spin chirality .
Session 2. Critical spin fluctuations at the phase transition in helimagnets.
Session 3. Monoaxial chiral helimagnets
Session 4. Chiral couplings and phase transitions in helimagnets
Session 5. Exotic spin structures (skyrmions, merons, etc.)
Session 6. Spin excitations in helimagnets with DM interaction
Session 7. Theory of DMI effect on the magnetic structure
Session 8. Hall effect in chiral magnetic structures
Session 9. Thin films and surface effects in cubic ferromagnets without center of symmetry
Session 10. Antiferromagnets and multiferroics
Session 11. Neutron scattering for non-collinear magnetism

Tuesday. 26 May 2015

8.00 – 13.30
Transfer from St-Petersburg to Pskov,
Check in at the hotel,
Registration,
Lunch


13.50 - 14.00 Opening ceremony


Session 1. Crystal handedness and spin chirality.
Chairman Vladimir Dmitrienko

14.00 – 14.30 Igor Zobkalo (Petersburg Nuclear Physics Institute Gatchina, Russia) 
«Chirality of spin systems and polarized neutrons»

14.30 – 15.00 Sven-Arne Siegfried (Helmholtz-Zentrum Geesthacht, Germany) 
«Flip of the chiral link between structure and magnetism in transition metal onosilicides and germanides»

15.00 – 15.30 Takashi Koretsune (CEMS, RIKEN, Japan) 
«Sign control of DM interaction in Mn1-xFexGe: A first-principles study»
15.30 – 15.50 Oleg Utesov (Petersburg Nuclear Physics Institute, Gatchina, Russia) 
«Low temperature properties of spiral magnets with defects»

15.50 – 16.10 Alexander Sukhanov (Petersburg Nuclear Physics Institute Gatchina, Russia) 
«From spiral to ferromagnetic structure in B20 compounds: role of cubic anisotropy»
16.10 -16.40 Coffee break

Session 2. Critical spin fluctuations at the phase transition in helimagnets.
Chairman Sergey V. Grigoriev

16.40 – 17.10 Isabelle Mirebeau (LLB, Sacley, France)
«Two-step pressure induced collapse of magnetic order and fluctuating chiral phase in MnGe Chiral magnet»

17.10 – 17.30 Gleb Valkovskiy (Saint-Petersburg State University, St-Petersburg, Russia) 
«Thermal expansion in the magnetic phase transition region of Mn1-xCoxGe»

17.30 – 17.50 Evgeny Altynbayev (Saint-Petersburg State University, St-Petersburg, Russia)
«Quantum fluctuations in Fe-doped MnGe compounds»

17.50 – 18.20 Sergey Demishev (Prokhorov General Physics Institute of RAS, Moscow, Russia) 
«How to see the invisible: hidden quantum critical point in Mn1-xFexSi»

18.20 – 18.40 Nadya Chubova (Petersburg Nuclear Physics Institute, Gatchina, Russia)
«Quantum and thermal spin fluctuations in Mn1-xFexSi: neutron small-angle scattering data»
19.00 Welcome party

Wednesday. 27 May 2015

Session 3. Monoaxial chiral helimagnets-I.
Chairman Katsuya Inoue

9.00 – 9.30 Jun-ichiro Kishine (The Open University of Japan, Japan) 
«Spintronic applications of mono-axial chiral helimagnet»

9.30 – 10.00 Yoshihiko Togawa, (Osaka Prefecture University, Japan) 
«Chiral Soliton Lattice in monoaxial CrNb3S6 single crystal»

10.00– 10.30 Shigeo Ohara (Nagoya Institute of Technology, Japan) 
«Effect of Partial Substitution of Cu for Ni on the Chiral Magnetic Properties of Rare-earth Intermetallic Compound YbNi3Al9»

10.30 – 10.50 Yusuke Kosaka (Hiroshima University, Japan) 
«Chiral Magnetic Soliton Lattice in MnSi»

10.50 – 11.10 Coffee break

Session 4. Chiral couplings and phase transitions in helimagnets.
Chairman Jun-ichiro Kishine

11.10 – 11.40 Alexander S. Ovchinnikov (Ural Federal University Ekaterinburg, Russia)
«RG analysis of phase transitions in a layered mono-axis chiral helimagnet»
11.40 – 12.00 Igor Proskurin (The Open University of Japan, Chiba,Japan) 
«Kosterlitz–Thouless Transition and Duality Mapping in a Chiral Helimagnet»

12.00 – 12.20 Misako Shinozaki (University of Tokyo, Japan) 
«Monte Carlo and Mean-Field Studies for Three-Dimensional Chiral Helimagnets»

12.20 – 12.40 Hiroyasu Matsuura (The University of Tokyo, Tokyo, Japan) 
«Theory of Dzyaloshinsky-Moriya interaction derived from screw structure of crystal»

12.40 – 13.00 Victor Laliena, (Instituto de Ciencia de Materiales de Aragón – Universidad de Zaragoza, Zaragoza, Spain) 
«Magnetic field driven incommensurate-commensurate transitions in chiral helimagnets»


13.00 – 14.00 Lunch

Session 3. Monoaxial chiral helimagnets-II.
Chairman Yoshihiko Togawa


14.00– 14.30 Roman Morgunov (Institute of Problems of Chemical Physics, Chernogolovka, Russia) 
«Series of sudden demagnetizing jumps in [Mn((R/S)-pn)]2[Mn((R/S)-pn)2(H2O)][Cr(CN)6]2 chiral magnet»

14.30– 14.50 Kazuki Ohishi  (Comprehensive Research Organization for Science and Society (CROSS) Tokai, Japan) 
«Chiral Helimagnetism in the Right- and the Left-Handed Single Crystalline Samples of CsCuCl3»

14.50– 15.10 Katsuya Inoue (Center for Chiral Science, Hiroshima Univ., Higashihiroshima, Hiroshima, Japan) 
«State-of-the-Art and Future of Chiral Material Science»

15.10 – 15.40 Coffee break

Session 5. Exotic spin structures (skyrmions)
Chairman Markus Garst

15.40 – 16.10 Stas Chadov (Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany) 
«Dzyaloshinskii-Moriya interaction and magnetocrystalline anisotropy in Heusler materials»

16.10 – 16.30 Olga Meshcheriakova (Max-Planck-Institut für Chemische Physik fester Stoffe, Dresden, Germany) 
«Large Noncollinearity and Spin Reorientation in the Novel Mn2RhSn Heusler Magnet»
16.30 – 16.50 Yuichi Yamasaki (CEMS, RIKEN, Japan) 
«Observation of skyrmion formation in FeGe under applied magnetic field by means of resonant small angle x-ray scattering»
16.50 – 17.10 Sergey Grigoriev (Petersburg Nuclear Physics Institute, Gatchina, Russia) 
«Conical lattice versus skyrmion lattice in MnSi: competition of two structures above TC»

17.30 Cultural evening in Pskov

Thursday 28 May 2015

Session 6. Spin excitations in helimagnets with DM interaction
Chairman Alexander S. Ovchinnikov


9.00 – 9.30 Markus Garst (Institut fur Theoretische Physik, Koln, Germany) 
«Magnon-skyrmion scattering in chiral magnets»

9.30 – 10.00 Johannes Waizner (Institut fur Theoretische Physik, Koln, Germany) 
«Chiral magnetic resonances and spin-wave excitations of helices and skyrmion crystals»

10.00 – 10.30 Max Kugler (TUM FRM-II, Garching, München, Germany) 
«Band structure of helimagnons in MnSi resolved by inelastic neutron scattering»

10.30 – 11.00 Dmitry Aristov (Petersburg Nuclear Physics Institute, Gatchina, Russia)
«Semiclassical approach to 2D ferromagnets with skyrmions»

11.00 – 12.00 Coffee break, Poster session

Ekaterina Iashina (Saint-Petersburg State University, St-Petersburg, Russia)
«Magnetic structure of Mn1/3NbS2 compound»
A.V. Tsypilnikov (Saint-Petersburg State University, St-Petersburg, Russia) 
«Magnon spectrum in ferromagnets with a skyrmion lattice»

Polina Matveyeva (Saint-Petersburg State University, St-Petersburg, Russia) 
«Stability of a skyrmion and interaction of magnons»

Tatiana Ischenko (A.M. Prokhorov General Physics Institute Moscow, Russia) 
«Spin polaron in the paramagnetic phase of manganese monosilicide»

Anatoly Tsvyashchenko (Vereshchagin Institute for High Pressure Physics, RAS, Moscow, Troitsk, Russia) 
«Hyperfine field assessment of the magnetic structure of ZrZn2»

Sven-Arne Siegfried (Helmholtz-Zentrum Geesthacht, Germany) 
«Magnetic phase diagram of transition metal monogermanides Mn1-xFexGe at x = 0.5- 0.7»

Ranjana Rani Das (Indian Institute of Technology, Madras, India) 
«Griffith phase observed in double perovskite Nd2CoMnO6»

Ekaterina Kunitsyna (IPCP RAS, Chernogolovka, Russia) 
«Bifurcation of magnetic anisotropy caused by small addition of Sm to (Nd1-xSmxDy)(FeCo)B magnetic alloy»

Vlad Tarnavich (Petersburg Nuclear Physics Institute  Gatchina, Russia) 
«Study of field induced chirality in helix structure Ho/Y multilayers»


Session 8. Theory of DMI effect on the magnetic structure – I
Chairman Stas Chadov


12.00 – 12.30 Sergey Maleyev (Petersburg Nuclear Physics Institute, Gatchina, Russia)
«Dzyaloshinskii-Moriya interaction in helimagnets»
12.30 – 13.00 Liviu Hozoi (IFW Dresden, Dresden, Germany) 
«Spin-orbit-driven exotic magnetism in 5d oxides »


13.00 – 14.00 Lunch

Session 8. Theory of DMI effect on the magnetic structure-II
Chairman Stas Chadov


14.00 - 14.30 Alexander A. Tsirlin (National Institute of Chemical Physics and Biophysics, Tallinn, Estonia) 
«Ab initio insight into Dzyaloshinsky-Moriya interactions and magnetic anisotropy in cuprates»

14.30 – 14.50 Attila Szilva (Uppsala University, Uppsala, Sweden)
«Non-collinear Interatomic Magnetic Exchange and Dzyaloshinskii-Moriya interaction»


Session 9. Hall effect in chiral magnetic structures
Chairman Sergey V. Demishev

15.00 – 15.30 Vladimir V. Glushkov (A.M. Prokhorov General Physics Institute Moscow, Russia) 
«Crossover between intrinsic and extrinsic anomalous Hall effect in MnSi»

15.30 – 15.50 Inna Lobanova (Prokhorov General Physics Institute of RAS, Moscow, Russia) 
«Hall effect in the paramagnetic phase of Mn1-xFexSi (x < 0.3)»

15.50 – 16.20 Coffee break

Session 10. Thin films and surface effects in cubic ferromagnets without center of symmetry
Chairman Sergey V. Demishev

16.20 – 16.50 Dirk Menzel (Institut fuer Physik der Kondensierten Materie, Technische Universitaet Braunschweig) 
«Thin Film Preparation and Characterization of B20 Chiral Magnets»

16.50 – 17.10 Robert Streubel (Institute for Integrative Nanosciences, IFW Dresden, Dresden, Germany) 
«Surface magnetic order and static defect structure in FeGe»

17.10 – 17.30 Charles Spencer (University of Leeds, Leeds, United Kingdom)
«Helical magnetic structure in Fe1-xCoxGe epilayers»


17.30 Cultural evening in Pskov.

Friday 29 May 2015

Session 11. Antiferromagnets and multiferroics
Chairman Isabelle Mirebeau


9.00 – 9.30 Vladimir Dmitrienko (A.V.Shubnikov Institute of Crystallography RAS, Moscow, Russia) 
«Sign of the Dzyaloshinskii–Moriya interaction in canted antiferromagnets: theory and measurements for 3d transition-metal carbonates »

9.30 – 10.00 Andrei Rogalev (ESRF, Grenoble, France) 
«Determination of the sign of Dzyaloshinskii-Moriya vector in crystals»

10.00 – 10.30 Kazuhisa Kakurai (Japan Atomic Energy Agency, Tokai, Japan)
«Polarized Neutron Investigation on Multiferroic Hexaferrite Ba2Mg2Fe12O22»
10.30 – 10.50 Manuel Pereiro (Uppsala University, Uppsala, Sweden) 
«Skyrmionic excitations in a kagome magnet»

10.50 – 11.05 Masha Kuchugura (Saint-Petersburg State University, St-Petersburg, Russia) 
«Investigation of chirality in TbMn2O5 by spherical neutron polarimetry»

11.05 – 11.30 Coffee break

Session 11. Neutron scattering for non-collinear magnetism
Chairman Kazuhisa Kakurai

11.30 – 12.00 K. Pappas (TUDelft, Delft, Netherlands) 
«Chiral Magnetism and Polarized Neutron Scattering»

12.00– 12.20 P. Kizhe (Grad-Kitezh University, Russia) 
«Spin waves in helimagnets studied by small angle polarized neutron scattering»

12.00 – 12.20 Konstantin Metlov (Donetsk Institute for Physics and Technology, Donetsk)
«Micromagnetic theory of a third-order effect in magnetic small-angle neutron scattering by a spatially inhomogeneous medium»
12.40 – 13.00 Alexey Bykov (Saint Petersburg State University, St-Petersburg, Russia)
«Quasi two-dimensional character of the magnetic transition in YMn6Sn6»

13.00 – 14.30 Lunch

15.00 – 19.00 Excursion through the old Russian town Pskov
19.00 – 22.00 Closure of conference and Conference dinner


Saturday 30 May 2015

9.00 Buses to Saint-Petersburg and Gatchina