Control of magnetocalorics by interface engineering in MAB phase and antiperovskite thin film model systems (B02)

将制备具有薄FM层和AFM层的磁热材料（Mn3GaC相和Fe2AlB2 MAB相）的原型薄膜系统和多层。磁致热材料与铁磁（FM）或反铁磁（AFM）材料之间的交换耦合控制磁致热性能。为了最大限度地提高绝热温度变化和调整转变温度，将测试不同元素掺杂剂，并与A03、B05和A04项目一起对磁响应进行表征。通过这种方式，我们的目标是匹配Mn3GaC中的AFM/FM和FM/PM相变，并将Fe2AlB2中的准二阶相变设计成与B03项目密切相关的一阶磁制冷相变。

Prototype thin film systems and multilayers of the magnetocaloric materials (Mn3GaC phase and Fe2AlB2 MAB phase) with thin FM and AFM layers will be prepared. The magnetocaloric properties will be controlled by exchange coupling between the magnetocaloric material and a ferromagnetic (FM) or antiferromagnetic (AFM) material. To maximize the adiabatic temperature change and tune the transition temperature different elemental dopants will be tested and the magnetic response characterized together with projects A03, B05 and A04. In this way, we aim to match the AFM/FM and FM/PM phase transitions in Mn3GaC and engineer the quasi 2nd order phase transition in Fe2AlB2 towards a 1st order transition for magnetic refrigeration in close interaction with project B03.