Physics of Nanoscale Epitaxial and Textured Spintronic Structures

技术摘要该奖项支持自旋电子学领域的实验研究和教育。该项目需要合成外延磁性纳米结构，以系统地控制自旋极化电流的输运和能谱。这项研究将致力于了解自旋电子学中的悬而未决的问题，这些问题对应用来说既是基础又是必不可少的。特别是，将对单晶半金属中的单个磁畴壁电阻进行测量，并开发利用预期的大磁畴壁电阻的纳米结构。该项目还旨在研究具有周期性磁畴壁的纳米结构，并使用巡回自旋电流来刺激由这种周期性引起的修正的自旋波激发。实验方法包括变温磁输运研究、外延化学气相沉积、磁控溅射和亚微米光刻。学生将接受培训，他们将获得先进的实验技术和材料加工的尖端技能。将努力从科学界代表性不足的群体中招募学生，包括妇女和少数民族，以参与这项研究。非技术摘要半导体技术在小型化方面面临严峻挑战。未来的电子学很可能依赖于电子自旋的基本属性。自旋电子学涉及几个同样重要的问题，与高度自旋极化的固体和微观系统中的自旋输运有关。这一个人研究人员奖支持一个利用电子自旋来创造新电子设备的项目。特别是，将对半金属中的磁畴-壁电阻进行测量，并开发利用预期的大磁畴-壁电阻的纳米结构。该项目还旨在研究具有周期性磁畴壁的纳米结构，并使用巡回自旋电流来刺激由这种周期性引起的修正的自旋波激发。这项活动的主要影响将是培训人力资源。学生将接受培训，他们将获得先进的实验技术和材料加工的尖端技能。将努力从科学界代表性不足的群体中招募学生，包括妇女和少数民族，以参与这项研究。这项研究将产生关于新型自旋电子纳米结构的新知识和数据。将发明新的自旋电子器件，并将其应用于现有解决方案无法满足的应用领域。

Technical Abstract This award supports experimental research and education in the field of spintronics. The project entails synthesis of epitaxial magnetic nanostructures for systematic control of the transport and energy spectra of spin-polarized current. The research will be directed toward the understanding of outstanding issues in spintronics, which are both fundamental and essential to applications. In particular, measurements of the single magnetic-domain-wall resistance in single crystal half-metals will be carried out as well as the development of nanostructures that will take advantage of the expected large domain-wall resistance. The project also aims at investigating nanostructures with periodic magnetic domain walls, and using itinerant spin currents to stimulate the modified spin-wave excitations arising from this periodicity. Experimental methods include variable-temperature magnetotransport studies, epitaxial chemical vapor deposition, magnetron sputtering, and submicron lithography. Students will be trained and they will acquire cutting edge skills in advanced experimental techniques and materials processing. There will be efforts to recruit students from underrepresented groups in science, including women and minorities, to participate in this research. Non-technical AbstractSemiconductor technology is facing severe challenges in miniaturization. Future electronics will likely rely on the fundamental attribute of electron spin. Spintronics concerns itself with several, equally important issues, related to highly spin-polarized solids and spin transport in microscopic systems. This individual investigator award supports a project to harnesses the electron's spin to create new electronics devices. In particular, measurements of the magnetic-domain-wall resistance in half-metals will be carried out as well as the development of nanostructures that will take advantage of the expected large domain-wall resistance. The project also aims at investigating nanostructures with periodic magnetic domain walls, and using itinerant spin currents to stimulate the modified spin-wave excitations arising from this periodicity. The primary impact of the activity will be the training of human resources. Students will be trained and they will acquire cutting edge skills in advanced experimental techniques and materials processing. There will be efforts to recruit students from underrepresented groups in science, including women and minorities, to participate in this research. This research will generate new knowledge and data on novel spintronic nanostructures. New spintronic devices will be invented and adapted to applications areas where existing solutions are inadequate.