S.M. Stishov^†^a, A.E. Petrova^‡^a, A.M. Belemuk^§^b
^aLebedev Physical Institute, Russian Academy of Sciences, Leninsky prosp. 53, Moscow, 119991, Russian Federation
^bVereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, Kaluzhskoe shosse 14, Troitsk, Moscow, 108840, Russian Federation

This article examines the characteristics of the magnetic phase transition in the chiral magnet MnSi and the weak first-order phase transition in the model ferroelectric KH₂PO₄ (KDP), analyzes the results of magnetoresistance and Hall effect measurements in MnSi and Mn(Co)Si, and presents data indicating the existence of a quantum critical region near T = 0 in the Mn(Co, Fe)Si and a mysterious universal line indicating that the contribution of spin fluctuations to the heat capacity is independent of the concentration and nature of impurities.

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Keywords: phase transitions, heat capacity, magnetoresistance, Hall effect
PACS: 05.70.Fh, 75.40.Cx, 75.47.−m (all)
DOI: 10.3367/UFNe.2026.08.040176
URL: https://ufn.ru/en/articles/2026/11/a/
Citation: Stishov S M, Petrova A E, Belemuk A M "Chiral itinerant magnet MnSi and mixied compounds Mn_1-x(Co, Fe)_xSi: physical properties and new results" Phys. Usp. 69 (11) (2026)

Received: 9th, July 2026, accepted: 11th, August 2026

Оригинал: Стишов С М, Петрова А Е, Белемук А М «Киральный зонный магнетик MnSi и смешанные соединения Mn_1-x(Co, Fe)_xSi: физические свойства и новые результаты» УФН 196 1123–1139 (2026); DOI: 10.3367/UFNr.2026.08.040176