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For the majority of previous work on Y3Fe5O12 (YIG)/normal metal (NM) bi-layered structures, the YIG layers were grown on Gd3Ga5O12 first and were then capped by an NM layer. This work demonstrates the sputtering growth of a Pt/YIG structure where the Pt layer was grown first and the YIG layer was then deposited on the top. The YIG layer shows well-oriented (111) texture, a surface roughness of 0.15 nm, and an effective Gilbert damping constant less than 4.7 × 10-4, and the YIG/Pt interface allows for efficient spin transfers. This demonstration indicates the feasibility of fabricating high-quality NM/YIG/NM tri-layered structures for new physics studies.
Bibliographical noteFunding Information:
This work was primarily supported by SHINES, an Energy Frontier Research Center funded by the U.S. Department of Energy (No. SC0012670). The structure and interface characterizations were supported by C-SPIN. The spin pumping studies were supported by the U.S. National Science Foundation (No. EFMA-1641989). The STEM and EDX measurements utilized the College of Science and Engineering (CSE) Characterization Facility, University of Minnesota (UMN), supported in part by the NSF through the UMN MRSEC program (No. DMR-1420013); and the CSE Minnesota Nano Center, UMN, supported in part by NSF through the NNIN program.
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- Period 4