Ferromagnetic resonance spin pumping in CoFeB with highly resistive non-magnetic electrodes |
| |
Authors: | Dong-Jun Kim Sang-Il Kim Seung-Young Park Kyeong-Dong Lee Byong-Guk Park |
| |
Institution: | 1. Department of Materials Science and Engineering, KAIST Institute for the Nanocentury, KAIST, Daejeon 305-701, Republic of Korea;2. Division of Materials Science, KBSI, Daejeon 305-806, Republic of Korea |
| |
Abstract: | The relative contribution of spin pumping and spin rectification from the ferromagnetic resonance of CoFeB/non-magnetic bilayers was investigated as a function of non-magnetic electrode resistance. Samples with highly resistive electrodes of Ta or Ti exhibit a stronger spin rectification signal, which may result in over-(or under-) estimation of the spin Hall angle of the materials, while those with low resistive electrodes of Pt or Pd show the domination of the inverse spin Hall effect from spin pumping. By comparison with samples of single FM layer and an inverted structure, we provide a proper analysis method to extract spin pumping contribution. |
| |
Keywords: | Spin pumping Ferromagnetic resonance Spin rectification Spin hall angle |
本文献已被 ScienceDirect 等数据库收录! |
|