<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" article-type="research-article" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Journal of Experimental and Theoretical Physics</journal-id><journal-title-group><journal-title>Journal of Experimental and Theoretical Physics</journal-title></journal-title-group><issn publication-format="print">0044-4510</issn><issn publication-format="electronic">3034-641X</issn><publisher><publisher-name>Russian Academy of Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31857/S0044451023040144</article-id><title-group><article-title>Pure Spin Current Injection into a Helimagnet</article-title><trans-title-group xml:lang="ru"><trans-title>Инжекция чисто спинового тока в гелимагнетик</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Yasyulevich</surname><given-names>I. A.</given-names></name><name xml:lang="ru"><surname>Ясюлевич</surname><given-names>И. А. </given-names></name></name-alternatives><email>yasyulevich_i_a_noemail@ras.ru</email><xref ref-type="aff" rid="aff-1"></xref><xref ref-type="aff" rid="aff-2"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Bebenin</surname><given-names>N. G</given-names></name><name xml:lang="ru"><surname>Бебенин</surname><given-names>Н. Г </given-names></name></name-alternatives><email>bebenin_n_g_noemail@ras.ru</email><xref ref-type="aff" rid="aff-3"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Ustinov</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Устинов</surname><given-names>В. В. </given-names></name></name-alternatives><email>ustinov_v_v_noemail@ras.ru</email><xref ref-type="aff" rid="aff-5"></xref></contrib></contrib-group><aff-alternatives id="aff-1"><aff><institution xml:lang="ru">Институт физики металлов им. М. Н. Михеева Уральского отделения Российской академии наук</institution><institution xml:lang="en">Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff><institution xml:lang="ru"></institution><institution xml:lang="en"></institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff><institution xml:lang="ru">Институт физики металлов им. М. Н. Михеева Уральского отделения Российской академии наук</institution><institution xml:lang="en">Institute of Natural Sciences and Mathematics, Ural Federal University named after the first president of Russia B.N. Yeltsin</institution></aff></aff-alternatives><aff-alternatives id="aff-5"><aff><institution xml:lang="ru">Институт физики металлов им. М. Н. Михеева Уральского отделения Российской академии наук;Уральский федеральный университет им. первого Президента России Б. Н. Ельцина</institution><institution xml:lang="en">Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences; Institute of Natural Sciences and Mathematics, Ural Federal University named after the first president of Russia B.N. Yeltsin</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-04-01" publication-format="electronic"><day>01</day><month>04</month><year>2023</year></pub-date><volume>163</volume><issue>4</issue><fpage>574</fpage><lpage>584</lpage><abstract xml:lang="en"><p>The injection of a pure spin current into a conducting helimagnet is investigated. The characteristic decay lengths for the spin current injected into the helimagnet are determined, and their physical meaning is described. It is shown that instead of the spin diffusion length, helimagnets are characterized by the decay length that is always smaller than the spin diffusion length, the difference in these lengths being determined by the ratio of the helimagnet spiral period to the spin diffusion length. We predict the existence of the “effect of the chiral polarization of a pure spin current,” i.e., the emergence of the spin current with longitudinal (transverse) polarization, which depends on the spiral chirality, upon the injection of a pure spin current with the transverse (longitudinal) polarization relative to the spiral axis.</p></abstract><trans-abstract xml:lang="ru"><p>Изучена инжекция чисто спинового тока в проводящий гелимагнетик. Найдены характерные длины затухания инжектированного в гелимагнетик спинового тока и описан их физический смысл. Показано, что в гелимагнетиках вместо длины спиновой диффузии возникает характерная длина затухания, которая всегда меньше длины спиновой диффузии, причём уменьшение определяется отношением периода спирали гелимагнетика к длине спиновой диффузии. Предсказано существование «эффекта киральной поляризации чисто спинового тока», заключающегося в том, что при инжекции в гелимагнетик вдоль оси его магнитной спирали чисто спинового тока с поперечной (продольной) относительно оси поляризацией возникает зависящий от киральности спирали спиновый ток продольной (поперечной) поляризации.</p></trans-abstract></article-meta></front><body></body><back><ref-list><ref id="B1"><label>B1</label><citation-alternatives><mixed-citation xml:lang="ru">M.N. Baibich, J.M. Broto, A. Fert, F. Nguyen Van Dau, F. Petroff, P. Etienne, G. Creuzet, A. Friederich, and J. Chazelas, Phys.Rev. 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