PAk 1: Fe-Pd-X Thin Film-Polymer Composites for Sensor Applications - Combinatorial Development of New Ferromagnetic Shape Memory Thin Films with Improved Intrinsic Properties

该项目是针对传感器应用的新型Fe-Pd基铁磁形状记忆合金的一揽子建议的一部分。该项目的目的是寻找具有改进的本征性能的新型FSMA，即马氏体相变和铁磁转变温度都远高于室温，以及高的磁各向异性和饱和磁化强度。这项研究将以Fe-Pd系统为基础，并添加其他元素。在Fe-Pd-X(-Y)体系中寻找新合金的策略将基于组合材料科学方法，即沉积薄膜材料库并通过自动筛选技术高通量表征这些材料。将使用与温度相关的磁电性质的自动测量来识别相变，并使用微机械悬臂梁阵列来并行光学检测形状记忆效应和磁致伸缩效应。为了优化薄膜的性能，我们将详细研究Fe-Pd-X(-Y)薄膜中马氏体相变温度和铁磁相变温度的成分依赖关系以及磁阻效应。最后，将利用微系统技术研究在新开发的薄膜中是否可以检测场感应应变。

The project is part of a package proposal aiming at new Fe-Pd based ferromagnetic shape memory alloys for sensor applications. The aim of this project is to identify new FSMA with improved intrinsic properties, i.e. both martensitic and ferromagnetic transition temperatures well above room temperature as well as a high magnetic anisotropy and saturation magnetization. The search will be based on the Fe-Pd system with additions of further elements. The strategy to find new alloys in the Fe-Pd-X(-Y) system will be based on the combinatorial materials science approach, i.e. deposition of thin film materials libraries and high-throughput characterization of these by automated screening technologies. An automated measurement of temperature-dependent magneto-electronic properties for the identification of phase transitions and micro-machined cantilever arrays for the parallel optical detection of the shapememory effect and magnetostrictive effects will be used. The compositional dependencies of martensitic and ferromagnetic phase transformation temperatures, as well as magnetoresistive effects in the Fe-Pd-X(-Y) thin films will be studied in detail in order to optimize film properties. Finally, it will be investigated if field-induced strain can be detected in the newly developed films by using microsystem technology.