A Platform to Develop and Utilise Characterisation Tools for Functional Magnetic Materials

开发和利用功能磁性材料表征工具的平台

• 批准号: EP/E016243/1
• 负责人: Lesley Cohen
• 金额: $ 99.49万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FE016243%2F1
• 关键词: Platform; Develop; Utilise; Characterisation; Tools

Magnetic materials have played an increasingly important role in our society. The Functional Magnetic Materials Group at Imperial College have developed a suite of novel characterisation tools over recent years. This proposal describes how with proper support we could utilise these tools to best effect in the study of materials important for application and develop key new tools as appropriate. The materials we aim to study during the course of the Platform grant fall into four main areas a) ultrathin film narrow gap semiconductors for magnetic sensor technology; b)superconducting materials for low field portable MRI technology; c) materials that allow the harnessing of electron spin d) materials for 300K magnetic refrigeration. The first areas are very much a part of what the group are currently doing however we want to incorporate the new elements such as strain measurements in our Hall probe and point contact facilities and nanoscale sensor fabrication. Our forward look for the group is in the areas of Spintronics and Magnetocalorics. In Spintronics we plan to develop new tools to harness and exploit spin in electrical materials mainly narrow gap semiconductors. Here again there will be an emphasis on nanofabrication of devices. Magnetocalorics is a very new area for the group and a very exciting one. Our characterisation capability is ideally suited to making a really important novel contribution here, particularly with access to higher resolution sensors that will come out of other parts of the program. Overall the group is well connected to a network of international collaborators and many of these have written letters of support for this proposal. It would be our aim to use the Platform in part to strengthen these links as well as seed new collaborations and explore new avenues for funding in Europe and with industrial collaborators.

磁性材料在我们的社会中发挥着越来越重要的作用。近年来，帝国理工学院的功能磁性材料小组开发了一套新颖的表征工具。该提案描述了如何在适当的支持下利用这些工具在对应用重要的材料的研究中发挥最佳效果，并酌情开发关键的新工具。我们在平台资助期间研究的材料分为四个主要领域：a）用于磁传感器技术的超薄膜窄间隙半导体； b)用于低场便携式MRI技术的超导材料； c) 允许利用电子自旋的材料 d) 用于 300K 磁制冷的材料。第一个领域在很大程度上是该小组目前正在做的事情的一部分，但我们希望将新元素纳入其中，例如霍尔探针中的应变测量、点接触设施以及纳米级传感器制造。我们对该小组的展望是自旋电子学和磁热学领域。在自旋电子学中，我们计划开发新工具来利用和利用电子材料（主要是窄带隙半导体）中的自旋。这里再次强调设备的纳米制造。磁热学对于该团队来说是一个非常新的领域，也是一个非常令人兴奋的领域。我们的表征能力非常适合在这里做出真正重要的新颖贡献，特别是可以使用来自该计划其他部分的更高分辨率传感器。总体而言，该小组与国际合作者网络有着良好的联系，其中许多人都写了对该提案的支持信。我们的目标是利用该平台在一定程度上加强这些联系，并培育新的合作，并探索在欧洲以及与工业合作者进行融资的新途径。

项目成果

Study of the dynamical features of the austenite-martensite phase transition in the Ni50(Mn, 1%Fe)34In16 alloy using scanning Hall probe imaging

• DOI: 10.1063/1.3689283
• 发表时间: 2012-03
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: M. Chattopadhyay;K. Morrison;A. Dupas;V. Sharma;L. Chandra;L. Cohen;S. Roy

History dependence of directly observed magnetocaloric effects in (Mn, Fe)As

• DOI: 10.1063/1.4729893
• 发表时间: 2012-06
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: M. Bratko;K. Morrison;A. D. Campos;S. Gama;L. Cohen;K. G. Sandeman

Specific heat and entropy change at the first order phase transition of La(Fe-Mn-Si)13-H compounds

• DOI: 10.1063/1.4928086
• 发表时间: 2015-08-07
• 期刊: JOURNAL OF APPLIED PHYSICS
• 影响因子: 3.2
• 作者: Basso, Vittorio;Kuepferling, Michaela;Cohen, Lesley F.
• 通讯作者: Cohen, Lesley F.

Visual evidence of the magnetic glass state and its re-crystallization in Gd 5 Ge 4

Gd 5 Ge 4 中磁性玻璃态及其重结晶的视觉证据

• DOI: 10.1209/0295-5075/83/57006
• 发表时间: 2008
• 期刊: EPL (Europhysics Letters)
• 作者: Chattopadhyay M