MRI: Acquisition of a Quantum Design Magnetic Property Measurement System (MPMS)

现代技术的进步与材料的发现紧密相连，这些材料提供了比现有材料更新或更好的性能。对现有材料及其相应性质的广博知识，以及我们对原子在材料中的位置和它们所拥有的性质之间的联系的日益加深的理解，使研究人员能够更熟练地设计具有所追求的性能的新材料。在实施被认为会带来更好材料的设计想法和实际发现更好材料之间的进展速度，关键取决于对所制造材料的实际原子结构和性质的反馈。有了这样的反馈，材料设计思想的有效性被验证或否认，提供的知识可以在精致的尝试中采取行动，制造出更好的材料。这笔赠款提供的设备是加速发现磁性材料之路的重要组成部分。当超导体排出磁场时，它也有助于识别新的超导体，该设备测量的磁场灵敏度比康奈尔大学目前用于这一目的的现有仪器提高了100倍。这些更灵敏和准确的磁测量还将帮助科学家使用康奈尔大学由美国国家科学基金会(NSF)支持的国家用户设施PARADIM，以探索发现新的磁性材料和新的超导体。PARADIM的使命是加速发现无机材料。这笔赠款使设备的灵敏度得到提高，这对PARADIM专注于“界面材料”至关重要，在这种材料中，磁性效应可以来自通常包含数百万层原子层的样品中的单层原子层。新仪器的更广泛影响包括对学生的培训，以及它对康奈尔大学广大研究人员以及来自全国各地在PARADIM中发现新无机材料的用户的可获得性。这笔赠款的支持使康奈尔大学能够获得量子设计磁性测量系统(MPMS)，以表征和研究材料的磁性。新型MPMS的灵敏度比康奈尔大学现有的PPMS系统高100倍，这将有助于研究目前无法触及的全新材料类别，包括原子薄和界面系统，并为来自全国各地的学术界、国家实验室和工业界的研究人员加速发现卓越的电磁材料。新仪器将安置在康奈尔材料研究中心(CCMR)，该中心的两台通用仪器(量子设计PPMS)可以表征磁性，但其有限的灵敏度限制了要研究的磁性材料的类型。MPMS的加入将加速材料发现，这是最近由NSF资助的国家用户设施的任务，总部设在康奈尔，被称为界面材料加速实现、分析和发现平台(PARADIM)，这是NSF材料创新平台。该MPMS还将极大地提高康奈尔大学研究人员在自旋电子学、超导和二维材料以及电子和磁性设备等领域的能力，影响到来自4个系和2所学院的19名教职员工的生产力，以及康奈尔大学国家科学基金会-MRSEC的一个跨学科研究小组(IRGS)，该小组专注于下一代磁存储器和设备的自旋操纵材料。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Advances in modern technology are tightly linked to the discovery of materials that provide new or superior properties compared to existing ones. The vast knowledge of existing materials, their corresponding properties, and our emerging understanding of the connection between the positions of atoms in materials and the properties they possess allows researchers to more skillfully design new materials with sought after properties. The pace of progress between implementing design ideas that are believed to lead to superior materials and the actual discovery of superior materials is crucially dependent on feedback on the actual atomic structure and properties of the materials made. With such feedback the validity of materials design ideas is verified or denied, providing knowledge that can be acted upon in refined attempts to make superior materials. The equipment made possible by this grant is an important element of the path to accelerate the discovery of magnetic materials. It is also useful to identifying new superconductors as superconductors expel magnetic fields, which this equipment measures with a 100-fold increase in sensitivity compared to existing instruments at Cornell University currently being used for this purpose. These more sensitive and accurate magnetic measurements will also aid scientists using Cornell's national user facility supported by the NSF known as PARADIM in their quest to discover new magnetic materials and new superconductors. PARADIM's mission is to accelerate the discovery of inorganic materials. The enhanced sensitivity of the equipment made possible by this grant is vital to PARADIM's focus on "interface materials," where magnetic effects can originate from a single layer of atoms within a sample containing typically millions of atomic layers. The broader impact of the new instrument includes the training of students and its accessibility to the broad community of researchers within Cornell as well as users from across the nation that come to discover new inorganic materials in PARADIM.The support of this grant enables Cornell University to acquire a Quantum Design Magnetic Property Measurement System (MPMS) to characterize and investigate the magnetic properties of materials. The higher sensitivity of the new MPMS - 100 fold greater than Cornell's existing PPMS systems - will facilitate the investigation of entirely new classes of materials, including atomically thin and interfacial systems, which are currently out of reach, and accelerate the discovery of superior electronic/magnetic materials for researchers from academia, national labs, and industry from across the country. The new instrument will be housed at the Cornell Center for Materials Research (CCMR), whose two general-purpose instruments (Quantum Design PPMS) can characterize magnetic properties, but their limited sensitivity restricts the type of magnetic materials to be investigated. The addition of the MPMS will accelerate materials discovery, which is the mission of the recently NSF-funded national user facility headquartered at Cornell known as the Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM), an NSF Materials Innovation Platform. This MPMS will also greatly enhance the ability of Cornell researchers in areas ranging from spintronics, superconductivity, and two-dimensional materials, to electronic and magnetic devices, impacting the productivity of 19 faculty members across 4 departments and 2 colleges, as well as one of the interdisciplinary research groups (IRGs) of the NSF-MRSEC at Cornell, which is focused on spin manipulation of materials for next-generation magnetic memories and devices.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.