Investigation of the properties of multiferroic crystals at low temperatures: A Visiting Fellowship for Dr. C.V. Tomy

多铁性材料是表现出铁磁有序和铁电有序的材料，更有趣的是，这两种有序状态之间的耦合：铁磁有序可以由电场控制，铁电有序可以由磁场控制。对多铁性的研究是一个新兴的和令人兴奋的领域，不仅因为它产生了新的和丰富的物理学，而且因为这些材料在实际设备应用中的潜力。沃里克的超导和磁性小组目前正在与物理系的托马斯教授小组合作研究多铁性。我们希望研究的多铁性材料（锰氧化物，低维和受抑磁体）在低（液氦）温度下表现出磁性和铁电性有序。这个建议解决了在沃里克的低温实验安排的需要，以调查的介电和铁电性能的几个多铁性晶体，以便能够充分了解它们在低温下表现出的磁有序和铁电性能之间的耦合。该提案要求提供资金，以容纳来自I.I.T.的C.V. Tomy博士的访问，印度孟买，作为访问研究员前往沃里克，为期12个月。Tomy博士是一位经验丰富的低温物理学家，他的专业知识非常适合拟议的项目。在这12个月的时间里，我们计划在沃里克建立一个工作实验装置，用于研究多铁性材料的性质，并研究几种新的多铁性材料的多铁性。

Multiferroics are materials that exhibit both ferromagnetic order as well as ferroelectric order and more intriguingly, a coupling between these two ordered states: the ferromagnetic order can be controlled by an electric field and the ferroelectric order can be controlled by a magnetic field. Research into multiferroics is an emerging and exciting area not just for the new and rich physics that it has thrown up, but also for the potential these materials hold for practical device applications. The Superconductivity and Magnetism group at Warwick is currently working in collaboration with Prof Thomas group in the Department of Physics for research into multiferroics. The multiferroics we wish to investigate (Manganites, low dimensional and frustrated magnets) exhibit both magnetic and ferroelectric ordering at low (Liquid Helium) temperatures. This proposal addresses the need for a low temperature experimental arrangement at Warwick to investigate the dielectric and ferroelectric properties of several multiferroic crystals in order to be able to fully understand the coupling between the magnetic ordering and their ferroelectric properties they exhibit at low temperatures. The proposal requests funds to accommodate the visit of Dr. C.V. Tomy from the I.I.T., Bombay, India, as a Visiting Researcher to Warwick for a period of 12 months. Dr. Tomy is an extremely experienced low temperature physicist whose expertise is ideal for the proposed project. In this 12 month period, we propose to establish a working experimental facility for the investigation of the properties of multiferroics at Warwick as well as to study the multiferroic properties of several new multiferroics.