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 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 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 phase diagrams for along the directions [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 [001] case. Single-crystal neutron diffraction results reveal that the [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.
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.