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

doi:10.7566/JPSJ.88.043701

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 journal › Article › peer-review

11 Citations (Scopus)

Abstract

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 language	English
Article number	043701
Journal	Journal of the Physical Society of Japan
Volume	88
Issue number	4
DOIs	https://doi.org/10.7566/JPSJ.88.043701
Publication status	Published - 2019
Externally published	Yes

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title = "Anionogenic Magnetism Combined with Lattice Symmetry in Alkali-metal Superoxide RbO2 ",

abstract = "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.",

author = "Fahmi Astuti and Mizuki Miyajima and Takahito Fukuda and Masashi Kodani and Takehito Nakano and Takashi Kambe and Isao Watanabe",

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T1 - Anionogenic Magnetism Combined with Lattice Symmetry in Alkali-metal Superoxide RbO2

AU - Astuti, Fahmi

AU - Miyajima, Mizuki

AU - Fukuda, Takahito

AU - Kodani, Masashi

AU - Nakano, Takehito

AU - Kambe, Takashi

AU - Watanabe, Isao

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

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DO - 10.7566/JPSJ.88.043701

M3 - Article

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SN - 0031-9015

VL - 88

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 4

M1 - 043701

ER -

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

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