Anionogenic Magnetism Combined with Lattice Symmetry in Alkali-metal Superoxide RbO2

Fahmi Astuti*, Mizuki Miyajima, Takahito Fukuda, Masashi Kodani, Takehito Nakano, Takashi Kambe, Isao Watanabe

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


X-ray powder diffraction (XRPD), magnetic susceptibility and muon-spin relaxation (µSR) measurements were carried out to investigate lattice symmetries and magnetic properties of one of alkali-metal superoxides, RbO2. Two structural transitions were observed around 170 and 100 K in conjunction with the appearance of anomalies in the magnetic susceptibility. A static antiferromagnetic long-range ordered state of unpaired spins on O2 dumbbells with the full magnetic volume fraction was confirmed from µSR below about 15 K. In comparison with CsO2, it is suggested that small changes in the lattice symmetry driven by changes in the O2 dumbbell orientation causes different magnetic properties in alkali-metal superoxides.

Original languageEnglish
Article number043701
JournalJournal of the Physical Society of Japan
Issue number4
Publication statusPublished - 2019
Externally publishedYes


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