YbCo2的磁性结构与相图比热、介子自旋、弛豫和中子衍射研究

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-07-19 DOI:10.1016/j.jallcom.2025.182352

Jaroslav Valenta, Milan Klicpera, Naohito Tsujii, Masashi Hase, Petr Proschek, Jan Prokleška, James R. Hester, Yukari Matsuo, Hiroya Sakurai, Gerald D Morris, Bassam Hitti, Rasmus Palm, Martin Mansson, Izumi Umegaki, Kazuki Ohishi, Jun Sugiyama, Takao Mori, Jiří Kaštil

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引用次数: 0

摘要

本研究通过比热测量、介子自旋光谱、外加磁场下的中子衍射等手段探讨了YbCo2的磁性能。在比热0.3 K处的磁跃迁异常标志着磁序的开始，这进一步得到了μ子自旋共振数据的证实。在外加磁场中观察到的第二次比热异常表明磁场引起的磁有序变化，并由磁场中的中子衍射实验证实。在低磁场下，Yb磁矩呈共线排列，而Co磁矩与Yb磁矩呈反平行排列。增加外部磁场，Co矩产生额外的反铁磁分量，改变整体磁结构。在低磁场和高磁场中观测到的磁顺序一致地由单一磁空间群Imm ' a描述，并与理论预测很好地一致。

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Magnetic structure and phase diagram of YbCo2; specific heat, muon spin rotation and relaxation and neutron diffraction study

This study explores the magnetic properties of YbCo₂ through specific heat measurements, muon spin rotation spectroscopy, and neutron diffraction under external magnetic fields. A magnetic transition anomaly at 0.3 K in specific heat marks the onset of magnetic order, further corroborated by muon spin resonance data. A second anomaly in specific heat observed in an applied magnetic field indicates a field-induced change of magnetic ordering, confirmed by neutron diffraction experiment in magnetic fields. Yb magnetic moments exhibit a collinear ferromagnetic ordering, while Co moments align antiparallel to Yb moments at low magnetic fields. Increasing the external magnetic field, Co moments develop an additional antiferromagnetic component, modifying the overall magnetic structure. The observed magnetic order in low and high magnetic fields is consistently described by the single magnetic space group Imm’a’ and aligns well with theoretical predictions.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.