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了越来越重要的作用。近年来，帝国大学的功能磁性材料组开发了一套新颖的特征工具。该建议描述了如何在适当的支持下使用这些工具来最大程度地影响对应用重要的材料研究，并适当开发关键的新工具。我们旨在在平台赠款过程中研究的材料属于四个主要区域a）超薄膜狭窄的磁性传感器技术狭窄间隙半导体； b）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）300K磁制冷的材料。第一个领域是该小组目前正在做的事情的一部分，但是我们希望将新元素（例如应变测量值）结合在我们的霍尔探针和点接触设施中，以及纳米级传感器的制造。我们对该小组的前瞻性位置是旋转和磁化的领域。在Spintronics中，我们计划开发新工具来利用和利用主要狭窄间隙半导体的电气材料中的自旋。在这里，再次将重点放在设备的纳米化。磁化物是该小组的一个非常新的领域，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此处做出非常重要的新颖贡献，尤其是使用该程序其他部分的较高分辨率传感器。总体而言，该小组与国际合作者网络有很好的联系，其中许多人已经为此提案提供了支持信。我们的目标是使用该平台来加强这些链接以及种子新的合作，并探索欧洲和工业合作者资助的新途径。

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