Chemistry for 3D spintronics

3D 自旋电子学化学

• 批准号: 406700532
• 负责人: Professor Dr. Julien Bachmann, Ph.D.
• 金额: --
• 依托单位: SPINTEC Laboratory
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/406700532?language=en
• 关键词: Chemistry; 3D; spintronics

Spintronics is worth billions in magnetic sensors, and is fast emerging in the semiconductor industry (MRAM). Devices use both effects of magnetoresistance (magnetization influencing electric current) and the reverse, spin-transfer torques (a spin-polarized current to reverse magnetization). Spintronics require several magnetic and non-magnetic materials in contact, with length scales a few nanometers. Thus, it was unlocked by progress in thin film technology, and developed as planar devices based on lithography.However, as sensors and memories are becoming mature, limitations in terms of functions or capacities are identified. Devices for sensing field efficiently equally in all three direction are required, which is difficult to achieve with planar technology. For memories, the competition for increased areal density is driving technology to 3D schemes, in which a large number of bits is stored in the depth. It is thanks to this that flash memory has become a leader recently.We will explore the synthesis and physics of building blocks for a 3D spintronics, based on tubes and core-shell tubes/wires. Top-down techniques face their limits to define these. Instead, we propose an interdisciplinary consortium with two chemistry groups and a spintronic end user. As an exploratory project, we focus on delivering a building block for the two major spintronic effects and type of application: 1. magneto-resistance in single (AMR) or core-shell trilayers (GMR or TMR), with sensors as background. 2. spin-torque and spin-Hall domain-wall motion in single or metal/ferro core-shell bilayers, with the 3D race-track memory as a potential application.In a device the tubes would be embedded vertically in a medium, in bottom-up pores or vias based on lithography. In this first step we focus on single objects freed from their template and inspected at a surface. Synthesis includes polymeric track-etched membranes and anodization of aluminum for templates, electro- (and electroless) plating and atomic layer deposition for both metal and insulating layers of the core-shell. Physical measurements consist of electrical contacting and magneto-resistance, combined with magnetic microscopy.While electrochemistry in pores has been used for decades to produce arrays or vertical wires, investigation on single wires, and spintronics in mind, is only emerging. Only a handful of reports exist on magnetic tubes. The project is exploratory, at the cross-roads of material science and spintronics. It is high risk/high-gain, promising disruptive concepts for integrated components. In the shorter run, it will provide a playground for new physics, predicted to occur with interplay of magnetism with curvature and the specific topology of tubes. Besides, another impact is to foster joint work between chemists and spintronic physicists, to address other aspects where physical methods face limits.The project is a resubmission, taking into account reviewers' comments.

Spintronics的磁性传感器价值数十亿，并且在半导体行业（MRAM）中快速出现。设备都使用磁化（磁化影响电流）和反向的自旋转移扭矩（自旋偏振电流以反向磁化强度）的效果。 Spintronics需要几种接触中的磁性和非磁性材料，长度为几纳米。因此，它被薄膜技术的进度解锁，并根据平面图开发为平面设备。但是，随着传感器和记忆的成熟，确定了功能或能力方面的限制。需要在所有三个方向上有效地平等传感的设备，这对于平面技术很难实现。对于记忆，面积增加的竞争是将技术推向3D方案，其中大量位置在深度中存储。正是由于这种情况，闪存最近已成为领导者。我们将根据管子和核心壳管/电线探索3D Spintronics的构建块的合成和物理。自上而下的技术面临着定义这些的限制。取而代之的是，我们提出了一个与两个化学组和一个自旋最终用户的跨学科财团。作为一个探索性项目，我们专注于为两个主要的自旋效应和应用类型提供一个构建块：1。单个（AMR）或核心壳三层型（GMR或TMR）中的磁性抗性，具有传感器作为背景。 2。以3D赛车记忆作为潜在的应用中的单个或金属/铁芯壳双层中的旋转旋转和自旋式域壁运动。在第一步中，我们专注于从模板中释放并在表面进行检查的单个对象。合成包括聚合物痕迹的膜和铝的阳极阳极，用于模板，电气（和电气）板和原子层沉积，用于金属的金属和芯壳的绝缘层。物理测量包括电接触和磁性抗性，结合磁显微镜组成。在数十年中，毛孔中的电化学已用于产生阵列或垂直线，对单线电线进行了研究，并且考虑到旋转的核心，但仅出现了。磁管上只有少数报道。该项目是探索性的，在材料科学和Spintronics的跨道路上。这是高风险/高增益，有希望的综合组件概念。在较短的运行中，它将为新物理学提供一个游乐场，预计会发生磁力与曲率的相互作用和管子的特定拓扑结构。此外，另一个影响是促进化学家和自旋形象学家之间的联合工作，以解决物理方法面临限制的其他方面。考虑到审阅者的评论，该项目是重新提交的。