Magnetism and high-magnetic field magnetization in alkali superoxide CsO2

Mizuki Miyajima*, Fahmi Astuti, Takeshi Kakuto, Akira Matsuo, Dita Puspita Sari, Retno Asih, Kouichi Okunishi, Takehito Nakano, Yasuo Nozue, Koichi Kindo, Isao Watanabe, Takashi Kambe

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Alkali superoxide CsO2 is one of the candidates for the spin-12 one-dimensional (1D) antiferromagnet, which may be sequentially formed by an ordering of the π-orbital of O2 molecule below TS ∼ 70 K. Here, we report the magnetism and the high-magnetic field magnetization in pulsed-magnetic fields up to 60 T in powder CsO2. We obtained the low temperature phase diagram around the antiferromagnetic ordering temperature TN = 9.6 K under the magnetic field. At T = 1.3 K, we observed a remarkable up-turn curvature in the magnetization around a saturation field of ∼60 T, which indicates the low-dimensional nature of the spin system. The saturated magnetization is also estimated to be ∼1μB, which corresponds to spin-12. In this study we compare it with the theoretical calculation.

Original languageEnglish
Article number063704-1
JournalJournal of the Physical Society of Japan
Issue number6
Publication statusPublished - 2018
Externally publishedYes


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