Single Crystal Growth at Warwick

沃里克的单晶生长

• 批准号: EP/T005963/1
• 负责人: Geetha Balakrishnan
• 金额: $ 80.86万
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FT005963%2F1
• 关键词: Single; Crystal; Growth; Warwick

The study of materials is of fundamental importance to the development of modern day technologies. Advances are only possible because of the efforts of materials physicists and chemists who drive this progress, first discovering new materials and then continually improving the material's properties, and therefore their performance, to enable their use in key industrial applications. In order to optimize the figure of merit of many materials, it is important to carry out detailed investigations on high quality single crystals of the materials. Without single crystals, it is often not possible to understand the underlying physics of a material. Single crystal growth is therefore of strategic importance, allowing us to work at the forefront of investigations of the physics of condensed matter. The proposed programme will be carried out within the Superconductivity and Magnetism Group, which is a well-established centre with all the necessary expertise and equipment for both the production of high quality crystals, and the investigation of the properties of, a wide range of new and exotic materials. In the proposed project, high quality single crystals of oxides, selenides, silicides, borides, and intermetallics will be grown in single crystal form. Target materials include various low-dimensional and frustrated magnets; exotic superconductors; 2D, layered, and magnetic cleavable materials for heterostructures ; topological insulators. The studies of these crystals in the laboratory, complemented by those at central facilities using techniques such as neutron and x-ray scattering, muon spectroscopy, as well as ARPES and measurements in high magnetic fields, will enable a unified picture of the physics of the materials to be developed. For crystal growth by the floating zone technique, we will use the three different optical mirror furnaces that we have at Warwick (two halogen lamp furnaces and one xenon arc lamp furnace). The optical mirror furnaces allow us to grow crystals under different growth conditions including various gas atmospheres, in pressures of up to 10 bars and at temperatures of up to 3000 degrees C. A proposed upgrade to one of these furnaces will enable it operate at a maximum of 40 bars pressure. Other techniques such as flux growth, Bridgman growth and chemical vapour transport are also available for use for the crystal growth of certain materials, while the Czochralski technique will be used to produce single crystals of intermetallic materials using a tetra-arc furnace.The crystal growth activity intends to continue to support the existing wide collaborative network that has been built up over many years, and to attract new collaborations. We expect the whole of the UK materials and physics community, as well as many international scientists, to benefit from our work and the provision of high quality single crystal samples.

材料的研究对现代技术的发展至关重要。只有推动这一进步的材料物理学家和化学家的努力才有可能取得进展，他们首先发现新材料，然后不断改进材料的性能，从而使其能够在关键的工业应用中使用。为了优化许多材料的品质因数，对高质量的材料单晶进行详细的研究是很重要的。没有单晶，通常就不可能理解材料的基本物理。因此，单晶生长具有重要的战略意义，使我们能够站在凝聚态物理研究的前沿。拟议的方案将在超导和磁性小组内进行，该小组是一个成熟的中心，拥有生产高质量晶体和调查各种新材料和奇异材料的性质所需的所有专业知识和设备。在拟议的项目中，将以单晶形式生长高质量的氧化物、硒、硅化物、硼化物和金属间化合物单晶。目标材料包括各种低维和受阻的磁体；奇异的超导体；用于异质结构的二维、层状和磁性可解理材料；拓扑绝缘体。在实验室中对这些晶体的研究，加上在中央设施中使用中子和X射线散射、Muon光谱以及ARPES和高磁场测量等技术进行的研究，将使人们能够对材料的物理情况形成一个统一的图景。对于浮区法生长晶体，我们将使用华威的三个不同的光学镜面熔炉(两个卤素灯熔炉和一个氙弧灯熔炉)。光学镜面熔炉允许我们在不同的生长条件下生长晶体，包括不同的气体气氛，压力高达10巴，温度高达3000摄氏度。建议对其中一种熔炉进行升级，使其能够在最大40巴压力下运行。助熔剂生长、布里奇曼生长和化学气相传输等其他技术也可用于某些材料的晶体生长，而提拉法将用于使用四弧炉生产金属间化合物材料的单晶。晶体生长活动旨在继续支持多年来建立的现有广泛合作网络，并吸引新的合作。我们希望整个英国材料和物理界以及许多国际科学家都能从我们的工作和提供高质量的单晶样品中受益。

项目成果

Anisotropy-induced depinning in the Zn-substituted skyrmion host Cu 2 O Se O 3

Zn 取代的斯格明子主体 Cu 2 O Se O 3 中各向异性诱导的脱钉

• DOI: 10.1103/physrevb.102.104424
• 发表时间: 2020
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Birch M

Coexistence of type-I and type-II superconductivity signatures in Zr B 12 probed by muon spin rotation measurements

通过 μ 子自旋旋转测量探测 Zr B 12 中 I 型和 II 型超导特征的共存

• DOI: 10.1103/physrevb.102.144523
• 发表时间: 2020
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: Biswas P

Investigation of the transport, magnetic and flux pinning properties of the noncentrosymmetric superconductor TaRh2B2 under hydrostatic pressure

• DOI: 10.1016/j.physc.2019.1353586
• 发表时间: 2020-04-15
• 期刊: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
• 影响因子: 1.7
• 作者: Arumugam, S.;Subbulakshmi, N.;Balakrishnan, G.
• 通讯作者: Balakrishnan, G.