Magnetism and high-magnetic field magnetization in alkali superoxide CsO2

Abstract

Alkali superoxide CsO2 is one of candidates for the spin-1/2 one-dimensional (1D) antiferromagnet, which may be sequentially caused by an ordering of the pi-orbital of O2- molecule below TS ~ 70 K. Here, we report on the magnetism in powder CsO2 and high-magnetic field magnetization measurements in pulsed-magnetic fields of up to 60 T. We obtained the low temperature phase diagram around the antiferromagnetic ordering temperature TN = 9.6 K under the magnetic field. At 1.3 K, remarkable up-turn curvature in the magnetization around a saturation field of ~ 60 T is found, which corresponds to the spin-1/2. We will compare it with the theoretical calculation.

arXiv comment11 pages, 3 figures

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Cited by in corpus (4)

• Spin-gap formation due to spin-Peierls instability in $\pi$-orbital-ordered NaO${}_2$
• Spin-Orbital Ordering in Alkali Superoxides
• The crystal and magnetic structure of cesium superoxide
• Antiferromagnetic structure of alkali metal superoxide CsO${}_2$