Magnetic properties of the quasi-XY Shastry-Sutherland magnet Er2Be2SiO7

IF 3.1 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
A. Brassington, Q. Ma, G. Sala, A. I. Kolesnikov, K. M. Taddei, Y. Wu, E. S. Choi, H. Wang, W. Xie, J. Ma, H. D. Zhou, A. A. Aczel
{"title":"Magnetic properties of the quasi-XY Shastry-Sutherland magnet Er2Be2SiO7","authors":"A. Brassington, Q. Ma, G. Sala, A. I. Kolesnikov, K. M. Taddei, Y. Wu, E. S. Choi, H. Wang, W. Xie, J. Ma, H. D. Zhou, A. A. Aczel","doi":"10.1103/physrevmaterials.8.094001","DOIUrl":null,"url":null,"abstract":"Polycrystalline and single-crystal samples of the insulating Shastry-Sutherland compound <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mi>Er</mi><mn>2</mn></msub><msub><mi>Be</mi><mn>2</mn></msub><msub><mi>SiO</mi><mn>7</mn></msub></mrow></math> were synthesized via a solid-state reaction and the floating zone method, respectively. The crystal structure, Er single-ion anisotropy, zero-field magnetic ground state, and magnetic phase diagrams along high-symmetry crystallographic directions were investigated with bulk measurement techniques, x-ray and neutron diffraction, and neutron spectroscopy. We establish that <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mi>Er</mi><mn>2</mn></msub><msub><mi>Be</mi><mn>2</mn></msub><msub><mi>SiO</mi><mn>7</mn></msub></mrow></math> crystallizes in a tetragonal space group with planes of orthogonal Er dimers and a strong preference for the Er moments to lie in the local plane perpendicular to each dimer bond. We also find that this system has a noncollinear ordered ground state in zero field with a transition temperature of 0.841 K consisting of antiferromagnetic dimers and in-plane moments. Finally, we mapped out the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>H</mi><mtext>−</mtext><mi>T</mi></mrow></math> phase diagrams for <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mi>Er</mi><mn>2</mn></msub><msub><mi>Be</mi><mn>2</mn></msub><msub><mi>SiO</mi><mn>7</mn></msub></mrow></math> along the directions <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>H</mi><mo>∥</mo></mrow></math> [001], [100], and [110]. While an increasing in-plane field simply induces a phase transition to a field-polarized phase, we identify three metamagnetic transitions in the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>H</mi><mo>∥</mo></mrow></math> [001] case. Single-crystal neutron diffraction results reveal that the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>H</mi><mo>∥</mo></mrow></math> [001] phase diagram can be explained predominantly by the expected field-induced behavior of classical, anisotropic moments, although the microscopic origin of one phase requires further investigation.","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":"8 1","pages":""},"PeriodicalIF":3.1000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1103/physrevmaterials.8.094001","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

Polycrystalline and single-crystal samples of the insulating Shastry-Sutherland compound Er2Be2SiO7 were synthesized via a solid-state reaction and the floating zone method, respectively. The crystal structure, Er single-ion anisotropy, zero-field magnetic ground state, and magnetic phase diagrams along high-symmetry crystallographic directions were investigated with bulk measurement techniques, x-ray and neutron diffraction, and neutron spectroscopy. We establish that Er2Be2SiO7 crystallizes in a tetragonal space group with planes of orthogonal Er dimers and a strong preference for the Er moments to lie in the local plane perpendicular to each dimer bond. We also find that this system has a noncollinear ordered ground state in zero field with a transition temperature of 0.841 K consisting of antiferromagnetic dimers and in-plane moments. Finally, we mapped out the HT phase diagrams for Er2Be2SiO7 along the directions H [001], [100], and [110]. While an increasing in-plane field simply induces a phase transition to a field-polarized phase, we identify three metamagnetic transitions in the H [001] case. Single-crystal neutron diffraction results reveal that the H [001] phase diagram can be explained predominantly by the expected field-induced behavior of classical, anisotropic moments, although the microscopic origin of one phase requires further investigation.

Abstract Image

准 XY Shastry-Sutherland 磁体 Er2Be2SiO7 的磁特性
通过固态反应和浮区法分别合成了绝缘的 Shastry-Sutherland 化合物 Er2Be2SiO7 的多晶和单晶样品。通过体测量技术、X 射线和中子衍射以及中子光谱,研究了晶体结构、Er 单离子各向异性、零场磁基态以及沿高对称晶体学方向的磁相图。我们确定 Er2Be2SiO7 在正交 Er 二聚体平面的四方空间群中结晶,并且 Er 矩强烈倾向于位于垂直于每个二聚体键的局部平面内。我们还发现,该体系在零场中具有非共轭有序基态,其转变温度为 0.841 K,由反铁磁性二聚体和平面内矩组成。最后,我们绘制了 Er2Be2SiO7 沿着 H∥ [001]、[100] 和 [110] 方向的 H-T 相图。虽然面内磁场的增大只会引起向场极化相的相变,但我们在 H∥ [001] 的情况下发现了三种元磁转变。单晶中子衍射结果表明,H∥ [001] 相图主要可以用经典各向异性力矩的预期场诱导行为来解释,尽管其中一个相的微观起源还需要进一步研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Physical Review Materials
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.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信