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

被引：9

作者：

Astuti, Fahmi ^{[1
,2
]}

Miyajima, Mizuki ^{[3
]}

Fukuda, Takahito ^{[3
]}

Kodani, Masashi ^{[3
]}

Nakano, Takehito ^{[4
]}

Kambe, Takashi ^{[3
]}

Watanabe, Isao ^{[1
,2
]}

机构：

[1] RIKEN, Meson Sci Lab, Nishina Ctr, Wako, Saitama 3510198, Japan

[2] Hokkaido Univ, Dept Condensed Matter Phys, Sapporo, Hokkaido 0600810, Japan

[3] Okayama Univ, Dept Phys, Okayama 7008530, Japan

[4] Ibaraki Univ, Grad Sch Sci & Engn, Mito, Ibaraki 3108512, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2019年 / 88卷 / 04期

基金：

日本学术振兴会;

关键词：

ANTIFERROMAGNETISM; HYPEROXIDES; SYSTEMS; PHASES;

D O I：

10.7566/JPSJ.88.043701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

X-ray powder diffraction (XRPD), magnetic susceptibility and muon-spin relaxation (mu SR) 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 100K in conjunction with the appearance of anomalies in the magnetic susceptibility. A static antiferromagnetic long-range ordered state of unpaired spins on O-2(-) dumbbells with the full magnetic volume fraction was confirmed from mu SR below about 15 K. In comparison with CsO2, it is suggested that small changes in the lattice symmetry driven by changes in the O-2(-) dumbbell orientation causes different magnetic properties in alkali-metal superoxides.

引用

页数：5

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