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arXiv · 2603.02835

Thermodynamic and transport properties of high-quality single crystals of the altermagnet CrSb

Shubhankar Paul·Atsutoshi Ikeda·Giordano Mattoni·Shingo Yonezawa·Chanchal Sow
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Abstract

Altermagnetism (AM) is an emerging magnetic order unifying essential characteristics of ferromagnetic and antiferromagnetic states. The CrSb has attracted significant interest owing to its large altermagnetic spin-splitting energy. In this paper, we present the growth details of high-quality single crystals of CrSb using the self-flux method and investigate their physical properties. We obtained large (001) oriented hexagonal crystals, up to 2~$\times$~2.5~$\times$~1~mm$^3$ in size with residual resistivity ratio $\sim$ 11. A pronounced positive magnetoresistance of up to 80\% is observed at 3.5 K. Most strikingly, the room temperature specific heat value exceeds the Dulong-Petit limit, being attributed to a broad magnon contribution from the altermagnetic order of CrSb. The specific heat fit reveals a magnon energy gap $\sim$ 16 $\pm$ 1 meV. Further, ac susceptibility measurements demonstrate the absence of superconductivity down to 0.1 K. These findings underscore CrSb as a viable altermagnet for room temperature magnonic and spintronic applications.

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Shubhankar Paul, Atsutoshi Ikeda, Giordano Mattoni, Shingo Yonezawa, Chanchal Sow. 2026-06-16. Thermodynamic and transport properties of high-quality single crystals of the altermagnet CrSb. https://doi.org/10.1103/hnjw-k826

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