Magnetic structure of the noncentrosymmetric magnet Sr₂MnSi₂O₇ through irreducible representation and magnetic space group analyses.

IF 1.3 3区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Acta crystallographica Section B, Structural science, crystal engineering and materials Pub Date : 2024-10-01 Epub Date: 2024-09-11 DOI:10.1107/S2052520624007625

Y Nambu, M Kawamata, X Pang, H Murakawa, M Avdeev, H Kimura, H Masuda, N Hanasaki, Y Onose

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Abstract

Magnetic structures of the noncentrosymmetric magnet Sr₂MnSi₂O₇ were examined through neutron diffraction for powder and single-crystalline samples, as well as magnetometry measurements. All allowed magnetic structures for space group P42₁m with the magnetic wavevector q_m = (0, 0, ½) were refined via irreducible representation and magnetic space group analyses. The compound was refined to have in-plane magnetic moments within the magnetic space group Cmc2₁.1'_c (No. 36.177) under zero field, which can be altered to P2₁2₁2₁.1'_c (No. 19.28) above μ₀H = 0.067 (5) T to align induced weak-ferromagnetic components within one layer on the ab plane. All refined parameters are provided following the recent framework based upon the magnetic space group, which better conveys when exchanging crystallographic information for commensurate magnetic structures.

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通过不可还原表示和磁空间群分析非中心对称磁体 Sr2MnSi2O7 的磁结构。

通过对粉末和单晶样品进行中子衍射以及磁力测量，研究了非中心对称磁体 Sr2MnSi2O7 的磁结构。通过不可还原表示和磁性空间群分析，完善了磁波向量 qm = (0, 0, ½) 的空间群 P421m 的所有允许磁性结构。该化合物在零磁场下具有磁空间群 Cmc21.1'c（编号 36.177）内的面内磁矩，在 μ0H = 0.067 (5) T 以上，该磁矩可变为 P212121.1'c（编号 19.28），从而使 ab 平面上一层内的诱导弱铁磁成分保持一致。所有细化参数都是按照基于磁空间群的最新框架提供的，该框架在交换晶体学信息时能更好地表达相称的磁结构。

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

Acta crystallographica Section B, Structural science, crystal engineering and materials CHEMISTRY, MULTIDISCIPLINARYCRYSTALLOGRAPH-CRYSTALLOGRAPHY

CiteScore

3.60

自引率

5.30%

发文量

期刊介绍： Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials publishes scientific articles related to the structural science of compounds and materials in the widest sense. Knowledge of the arrangements of atoms, including their temporal variations and dependencies on temperature and pressure, is often the key to understanding physical and chemical phenomena and is crucial for the design of new materials and supramolecular devices. Acta Crystallographica B is the forum for the publication of such contributions. Scientific developments based on experimental studies as well as those based on theoretical approaches, including crystal-structure prediction, structure-property relations and the use of databases of crystal structures, are published.