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July 6, 2026
Ancient Craniiform Brachiopod: A Newly Discovered Species with a Unique Shell Shape and Lifestyle
Scientists from HSE University, MSU, and Tallinn University of Technology have studied a fossil species of ancient brachiopods that lived in a warm sea in what is now northern Estonia more than 445 million years ago. These ancient brachiopods developed a cup-shaped shell with a protective 'cap' that shielded them from overgrowth by other marine organisms. The study has been published in Palaeogeography, Palaeoclimatology, Palaeoecology.
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Psycholinguists from the Centre for Language and Brain at HSE University–St Petersburg have shown that words that are frequently misspelled are processed more slowly by readers, even when presented with the correct spelling. The researchers confirmed this effect for the first time using Russian-language materials and found that response speed is most strongly linked to how confidently individuals can distinguish the correct spelling of a word from an incorrect one. The study has been published in The Mental Lexicon.
July 2, 2026
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Spin wave stiffness and damping in a frustrated chiral helimagnet Co8Zn8Mn4 as measured by small-angle neutron scattering

Physical Review Research. 2022. Vol. 4. No. 2. Article 023239.
Ukleev V., Pschenichnyi K. A., Utesov O., Karube K., Muhlbauer S., Cubitt R., Tokura Y., Taguchi Y., White J., Grigoriev S. V.

Multiple intriguing low-temperature phenomena have recently been discovered in the family of chiral cubic
Co-Zn-Mn compounds with a β-Mn-type structure. In particular, Co8Zn8Mn4 displays a reduction of the
helical spiral pitch on cooling along with lattice shape transformations of metastable skyrmions and the
manifestation of peculiar magnetic textures due to strong magnetocrystalline anisotropy. Here we report on
temperature-dependent measurements of helimagnon excitations in the field polarized regime Co8Zn8Mn4
using the spin-wave (SW) small-angle neutron-scattering technique. By applying a new analytical expression
to interpret the data, quantitative estimates for both SW stiffness and damping are extracted across a wide
temperature range between 70 and 250 K. We speculate that their nontrivial temperature dependencies arise
due to the effects of magnetic frustration arising from Mn magnetic moments, which is further reflected in
continuous variations of both exchange and Dzyaloshinskii-Moriya interactions.

Research target: Physics
Language: English
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Keywords: спиновые волныспиральные магнетикиchiralityspiral magnetssmall-angle neutron scatteringмалоугловое рассеяние нейтроновspin-wavesкиральность
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