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arXiv · 1804.00377

Magnetism and high-magnetic field magnetization in alkali superoxide CsO2

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

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Mizuki Miyajima, Fahmi Astuti, Takeshi Kakuto, Akira Matsuo, Dita P. Sari, Retno Asih, Kouichi Okunishi, Takehito Nakano, Yasuo Nozue, Koichi Kindo, Isao Watanabe, Takashi Kambe. 2018-04-02. Magnetism and high-magnetic field magnetization in alkali superoxide CsO2. https://doi.org/10.7566/jpsj.87.063704

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