Physical property measurement System

物性测量系统

• 批准号: 465636543
• 金额: --
• 依托单位: Universität Münster
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/465636543?language=en
• 关键词: Physical; property; measurement; System

We apply for a low-maintainance cryogen-free magnetic device with a 9 T magnet with modular measurement options: ac and dc susceptibility, vibrating sample magnetometer, standard temperature range 2-400 K and oven option up to 1000 K, electrical conductivity, thermal conductivity, specific heat, magnetic measurements under high-pressure conditions and dilatometry. Magnetochemistry and Inorganic Solid State Chemistry are two supporting pillars in the natural science faculty of the Westfälische Wilhelms-Universität. Besides synthesis and structural characterization of new solids, the study of structure-property relationships plays a central role for a full understanding of the materials. The contributing groups are topically broadly based. The substance classes cover rare earth and transition metal based intermetallic compounds, ionic conductors, battery materials, thermoelectrics, photoresponsice materials, minerals and organic radicals. The different measurement modules of the PPMS are required for addressing the varying materials properties. The basic magnetochemical characterization (temperature- and field-dependent susceptibility and magnetization measurements) will most widely be used. The applicant group has long-term experience in this field and will share this expertize with all collaborating groups. For an innovative extension for the magnetochemical characterization we wish to install a high-pressure cell (up to 1.3 GPa), for samples from geosciences (expertise in the Klemmegroup) and for intermetallics. In parallel to the magnetic measurements, specific heat data will be measured, in order to get quantitative data for magnetic and structural phase transitions. This concerns intermetallic rare earth compounds, several organic radicals and samples from geosciences as well as ionic conductors. Electrical resistivity will be used as complementary tool for the basic characterization (metallic and semiconducting compounds). For magnetically ordering compounds, resistivity measurements give additional information on the ordering temperature and with respect to spin-disorder-scattering. This option will be used in the whole temperature range up to 400 K. Thermal conductivity measurements are essential for the characterization of thermoelectric materials (expertise in the Zeier group). Also these measurements will be conducted routinely up to 400 K. Further interesting projects concern thermal expansion. This is an important parameter for structural and magnetic phase transitions of intermetallic compounds as well as for lattice anharmonicity of ionic conductors and thermoelectrics. The new dilatometer allows to address these questions.

我们申请一种低磁阻无制冷剂磁性设备，带有9 T磁体，具有模块化测量选项：交流和直流磁化率，振动样品磁强计，标准温度范围2-400 K和高达1000 K的烘箱选项，电导率，热导率，比热，高压条件下的磁性测量和磁电阻测量。磁性化学和无机固态化学是Westfälische Wilhelms-Universität自然科学系的两大支柱。除了新固体的合成和结构表征之外，结构-性质关系的研究对于充分理解材料起着核心作用。投稿小组的主题广泛。物质类别包括稀土和过渡金属基金属间化合物、离子导体、电池材料、热电材料、光响应材料、矿物和有机自由基。PPMS需要不同的测量模块来处理不同的材料特性。基本的磁化学表征（温度和磁场相关的磁化率和磁化测量）将得到最广泛的使用。申请团体在这一领域有长期的经验，并将与所有合作团体分享这一专业知识。对于磁化学表征的创新扩展，我们希望安装一个高压单元（高达1.3 GPa），用于地球科学样品（Klemmegroup的专业知识）和金属间化合物。在磁性测量的同时，将测量比热数据，以获得磁性和结构相变的定量数据。这涉及金属间稀土化合物，几种有机基团和地球科学样品以及离子导体。电阻率将用作基本表征（金属和半导体化合物）的补充工具。对于磁性有序化合物，电阻率测量给出了关于有序温度和相对于自旋无序散射的额外信息。该选项将在高达400 K的整个温度范围内使用。热导率测量对于热电材料的表征至关重要（Zeier集团的专业知识）。此外，这些测量将在高达400 K的温度下进行。其他有趣的项目涉及热膨胀。这是金属间化合物的结构和磁性相变以及离子导体和热电体的晶格非谐性的重要参数。新的温度计可以解决这些问题。