Spin pumping effect in La0.7Sr0.3MnO3/Pt bilayer

Jauyn Grace Lin
Center for Condensed Matter Sciences
National Taiwan University, Taipei 10617, TAIWAN

时间：2014年6月16日上午10：00
地点：唐仲英楼A313

Abstract
In advanced spintronic devices, the generation, detection and control of pure spin current are the key issues to determine the quality of devices. The recent experimental success of detecting the pure spin current is based on the concept of inverse spin-Hall effect (ISHE) in association with the technique of spin pumping. In this study, we use La0.7Sr0.3MnO3as a magnetic source and microwave of 9.4 GHz as the driving force to generate ferromagnetic resonance and activate the spin transportation in Pt layer. The magnitude of spin voltage generated by ISHE depends on the thickness of Pt in association with the spin diffusion length. It also depends on the thickness of La0.7Sr0.3MnO3, related to the change of damping constant. The origin of thickness dependence of damping constant will be discussed.

林昭吟，1977－1981年毕业于台湾淡江大学物理系获得学士学位；1985－1987年于美国威奇托州立大学获得硕士学位；1988－1993年于美国休斯敦大学获得博士学位；1993－1994年于美国得克萨斯超导中心从事博士后研究；1994-1996年于台湾大学物理系博士后，后受聘于台湾大学凝态科学中心助理研究员。现为台湾大学凝态科学中心研究员，博士生导师。主要从事锰氧化物、超导体、半导体异质结构和纳米材料研究，发表Nature
Communications 等一批重要的SCI论文150余篇。为Nature出版社Scitific Report编辑部专家组成员，台湾女科技人学会副理事长，台湾中子科学学会副理事长，台湾物理学会理事、监事等学术兼职。