Continuous structural phase transition and antiferromagnetic order in ilmenite-type NiVO3

IF 3.1 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Physical Review Materials Pub Date : 2024-09-03 DOI:10.1103/physrevmaterials.8.094402

Hajime Yamamoto, Osamu Ikeda, Takashi Honda, Kenta Kimura, Takuya Aoyama, Kenya Ohgushi, Akio Suzuki, Kenji Ishii, Daiju Matsumura, Takuya Tsuji, Shintaro Kobayashi, Shogo Kawaguchi, Matteo d’Astuto, Tadashi Abukawa

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Abstract

We investigate the crystal and electronic structures as well as magnetic properties of ilmenite-type

NiV O_{3}

, which has attracted research interest as an

S

= 1 honeycomb lattice magnet. Ilmenite-type

NiV O_{3}

samples were synthesized under high-pressure and high-temperature conditions. Synchrotron x-ray diffraction and Rietveld refinement results demonstrated that

NiV O_{3}

underwent a continuous structural phase transition from the triclinic (

P \bar{1}

) phase to the rhombohedral (

R \bar{3}

) phase at 450 K. This transition is concomitant with the decomposition of the V-V dimers formed by the tetravalent V ions. X-ray absorption spectroscopy measurements confirmed that the Ni and V ions were divalent and tetravalent, respectively. Magnetic and specific heat measurements revealed that

NiV O_{3}

underwent an antiferromagnetic transition at 140 K, and a zigzag-type magnetic order with magnetic propagation vector

k = (0, 1 / 2, 0)

was observed by neutron diffraction measurements.

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钛铁矿型 NiVO3 中的连续结构相变和反铁磁秩序

我们研究了钛铁矿型 NiVO3 的晶体和电子结构以及磁性能，它作为一种 S = 1 蜂窝晶格磁体引起了研究兴趣。钛铁矿型 NiVO3 样品是在高压和高温条件下合成的。同步辐射 X 射线衍射和里特维尔德细化结果表明，NiVO3 在 450 K 时经历了从三菱（P1¯）相到斜方体（R3¯）相的连续结构相变。X 射线吸收光谱测量证实，镍离子和 V 离子分别为二价和四价。磁性和比热测量结果表明，NiVO3 在 140 K 时发生了反铁磁转变，中子衍射测量观察到磁传播矢量 k=(0,1/2,0) 的人字形磁序。

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来源期刊

Physical Review Materials Physics and Astronomy-Physics and Astronomy (miscellaneous)

CiteScore

5.80

自引率

5.90%

发文量

611

期刊介绍： Physical Review Materials is a new broad-scope international journal for the multidisciplinary community engaged in research on materials. It is intended to fill a gap in the family of existing Physical Review journals that publish materials research. This field has grown rapidly in recent years and is increasingly being carried out in a way that transcends conventional subject boundaries. The journal was created to provide a common publication and reference source to the expanding community of physicists, materials scientists, chemists, engineers, and researchers in related disciplines that carry out high-quality original research in materials. It will share the same commitment to the high quality expected of all APS publications.