Effect of GdIG interfacial layer on the spin pumping in YIG/Pt
Abstract
We report on a growth-induced ∼2.5-nm-thick gadolinium iron garnet (GdIG) interfacial layer formed at the Y3Fe5O12 (YIG) film and Gd3Ga5O12 (GGG) substrate. The exchange coupling between the interfacial GdIG layer and the YIG layer results in an exchange-dominated nonpropagating spin wave (SW) mode aside from the uniform ferromagnetic resonance (FMR) mode observed in spin pumping measurements. The spin current generated by the SW mode is comparable to that generated by the uniform FMR mode. A theoretical model is provided to demonstrate that the exchange coupling between the interfacial GdIG layer and the YIG layer results in two resonance frequencies. Our results provide insights into the generation and propagation of spin currents in the YIG/Pt system for low-power spintronics.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (16)
Wenzhuo Zhuang
State Key Laboratory of Spintronics, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University 1 , Nanjing 210093,
Yequan Chen
Wenxuan Sun
College of Chemistry
ZhongQiang Chen
Xudong Liu
Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials and Collaborative Innovation Center of Chemistry for Energy Materials (iChEM)
Ruitong Sun
Ruijie Xu
State Key Laboratory of Spintronics, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University 1 , Nanjing 210093,
Xu Zhang
Anke Song
State Key Laboratory of Spintronics, School of Electronic Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University 1 , Nanjing 210093,
Zhihao Li
Xingze Dai
National Key Laboratory of Spintronics, Nanjing University 1 , Suzhou 215163,
Fusheng Ma
Liang He
School of Mechanical Engineering, State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering
Yongbing Xu
National Key Laboratory of Spintronics, Nanjing University
Rong Zhang
Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong 999077, China
Xuefeng Wang
Beijing National Laboratory for Condensed Matter Physics