Studies of Artificial Spin Ice at Brookhaven and Lawrence Berkeley National Laboratories

布鲁克海文和劳伦斯伯克利国家实验室的人造旋转冰研究

基本信息

批准号：
EP/J021482/1
负责人：
Christopher Marrows
金额：
$ 5.9万
依托单位：
University of Leeds
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2012
资助国家：
英国
起止时间：
2012 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FJ021482%2F1
关键词：
Studies Artificial Spin Ice Brookhaven

项目摘要

Artificial spin ices are arrays of patterned nanomagnets. They make use of nanotechnology to reproduce many of the features found in the 'naturally-occurring' spin ices--pyrochlore crystals, in which rare earth moments are arranged meeting in groups of four at tetrahedral vertices so as to enforce geometric frustration--in a two-dimensional analog. In these artificial systems, all parameters can be specified by design and the exact configuration of the moments can be inspected using high resolution magnetic microscopy. As a result they offer exciting possibilities in studying statistical mechanical models in and out of thermal equilibrium, visualising phenomena such as fractionalised monopole excitations at room temperature in a way that is impossible in the pyrochlore systems, and exploring novel applications, such as using the 'magnetricity' of these monopoles to perform neuromorphic computing. Fabricating and studying these systems requires state-of-the-art facilities. Here we seek travel support to allow us to access three unique facilities at two US National Laboratories: the Center for Functional Nanomaterials (CFN) and the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory (BNL) and the Advanced Light Source (ALS) at Lawrence Berkeley National Laboratory (LBNL), at all of which we have won facility time to study artificial spin ices through competitive peer review. We will fabricate samples at the extreme nanoscale at the CFN, and study them in reciprocal (NSLS) and real (ALS) space at the two synchrotron facilities.

人工旋转式旋转是图案的纳米磁体的阵列。他们利用纳米技术来重现“自然出现的”旋转型晶体中发现的许多特征 - pyrochlore晶体，其中在四面体顶点的四个组中安排了稀有的地球时刻，以实施几何挫败感，以实施二维类似物。在这些人工系统中，所有参数均可通过设计指定，并且可以使用高分辨率磁显微镜检查矩的确切配置。结果，他们在热量平衡中和从室温下以分数化的单极激发来可视化现象，以一种在pyrochlore系统中不可能的方式来可视化现象，例如在室温下进行分数化的单极激发，并探索新的新颖应用，例如使用这些单单元来执行神经球形计算的“磁性”。制造和研究这些系统需要最先进的设施。在这里，我们寻求旅行支持，以使我们能够在美国两个国家实验室的三个独特设施：功能性纳米材料中心（CFN）和布鲁克黑文国家实验室（BNL）的国家同步物光源（NSLS）和国家同步光源（NSLS）和劳伦斯·伯克利（Lawrence Berkeley）国家实验室（lbnl）的竞争竞争时，我们已经在所有竞争中，我们已经在所有竞争者中竞争了，我们已经在所有竞争者中，我们已经在所有竞争者中竞争了，我们已经在所有竞争者中，我们已经在所有竞争者中竞争了，审查。我们将在CFN的Extreme Nanoscale上制造样品，并在两个同步器设施的倒数（NSL）和真实（ALS）空间中研究它们。