在微弱挫折的二维范德瓦尔斯绝缘体CrPSe3中不相称的反铁磁顺序
Mallesh Baithi1,2, Ngoc Toan Dang3,4, Tuan Anh Tran5
1Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon 16419, Republic of Korea.
Inorganic chemistry
|August 2, 2023
概括
研究人员发现了一种新的二维范德瓦尔斯材料,化 (CrPSe3),表现出弱磁丧. 这种材料显示出不相称的反铁磁秩序,扩大了对二维磁性的理解.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 磁力学 磁力学 是一种
背景情况:
- 强烈的磁性挫折抑制了磁性秩序,但弱弱的挫折可以导致复杂的磁性结构,如环状体或旋转密度波.
- 二维 (2D) 范德瓦尔斯材料为探索基本物理和新型应用提供了独特的平台.
研究的目的:
- 为了研究弱磁丧的2D范德瓦尔斯材料CrPSe3.3.的磁性特性.
- 描述CrPSe的磁性秩序和晶体结构3.
- 探索CrPSe3在旋转电子和量子设备中的潜力.
主要方法:
- 在最佳温度 (700°C) 下合成多晶CrPSe3,以确保相位纯度.
- 测量磁敏度以确定反铁磁过渡温度 (TN) 和库里-韦斯温度 (θCW).
- 中子衍射测量以揭示远程磁性秩序的性质.
- 拉曼光谱检查以确认单临床晶体结构 (C2/m对称) 的保存.
主要成果:
- 在TN ≈ 127 K时,CrPSe3表现出反铁磁过渡,具有很大的负基里-韦斯温度 (θCW ≈-301 K),表明弱磁丧 (f ≈ 2.4).
- 中子衍射证实了120K以下的远程不相称的反铁磁秩序的形成.
- 单临床晶体结构 (C2/m) 保持稳定到20K.
结论:
- CrPSe3是一种新的2D范德瓦尔斯材料,具有不相称的反铁磁秩序,这种现象在MPX3家族中以前没有观察到.
- 这些发现丰富了对二维材料磁性的理解,并表明了在自旋电子和量子设备中的潜在应用.
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