Absence of itinerant ferromagnetism in a cobalt-based oxypnictide

IF 3.1 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Physical Review Materials Pub Date : 2024-09-09 DOI:10.1103/physrevmaterials.8.094405

Hua-Xun Li, Hao Jiang, Yi-Qiang Lin, Jia-Xin Li, Shi-Jie Song, Qin-Qing Zhu, Zhi Ren, Guang-Han Cao

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引用次数: 0

Abstract

We report a layered transition-metal-ordered oxypnictide

{Sr}_{2} {CrCoAsO}_{3}

. The new material was synthesized by solid-state reactions under vacuum. It has an intergrowth structure with a perovskite-like

{Sr}_{3} {Cr}_{2} O_{6}

unit and

{ThCr}_{2} {Si}_{2}

-type

{SrCo}_{2} {As}_{2}

block stacking coherently along the crystallographic

c

axis. The measurements of electrical resistivity, magnetic susceptibility, and specific heat indicate metallic conductivity from the CoAs layers and short-range antiferromagnetic ordering in the

{CrO}_{2}

planes. No itinerant-electron ferromagnetism expected in CoAs layers is observed. This result, combined with the first-principles calculations and the previous reports of other CoAs-layer-based materials, suggests that the

Co - Co

bond length plays a crucial role in the emergence of itinerant ferromagnetism.

Abstract Image

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钴基氧化物中不存在巡回铁磁性

我们报告了一种层状过渡金属有序氧化锑 Sr2CrCoAsO3。这种新材料是在真空条件下通过固态反应合成的。它具有一种互生结构，其中包晶型 Sr3Cr2O6 单元和 ThCr2Si2 型 SrCo2As2 嵌段沿晶体学 c 轴相干堆叠。电阻率、磁感应强度和比热的测量结果表明，CoAs 层具有金属导电性，CrO2 平面具有短程反铁磁有序性。在 CoAs 层中没有观察到预期的迭电子铁磁性。这一结果与第一原理计算结果以及之前关于其他 CoAs 层基材料的报道相结合，表明 Co-Co 键长度在巡回铁磁性的出现中起着至关重要的作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.