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Characterization of interlayer coupling in YIG/Py bilayer using polarized neutron reflectometry |
| He Bai(白鹤)1,2, Wei He(何为)3, Dan Liu(刘丹)4, Jialiang Li(李嘉亮)1,2, Xiao Deng(邓霄)2,5, Yuan Sun(孙远)1,2, Songwen Xiao(肖松文)1,2, Sheng Cheng(成晟)1,2, Xiaozhi Zhan(詹晓芝)1,2, Jianwang Cai(蔡建旺)3, and Tao Zhu(朱涛)2,3,6,† |
1 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
2 Spallation Neutron Source Science Center, Dongguan 523803, China;
3 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
4 Department of Physics, Beijing Technology and Business University, Beijing 100048, China;
5 University of Science and Technology Beijing, Beijing 100083, China;
6 Songshan Lake Material Laboratory, Dongguan 523808, China |
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Abstract The complex interplay of magnetic interactions at the yttrium iron garnet (YIG)/ferromagnet interface is important for spintronic and magnonic devices. In this study, we present a comprehensive investigation of the interlayer coupling and switching mechanisms in YIG/Py (permalloy) heterostructures based on gadolinium gallium garnet (GGG) and SiO$_{2}$ substrates. We observe antiferromagnetic interlayer coupling between Py and YIG on SiO$_{2}$ substrates, whereas ferromagnetic interlayer coupling is observed on GGG substrates. Using polarized neutron reflectometry with depth- and element-resolved measurements, we obtain an in-depth understanding of the magnetic interactions between the YIG and Py layers. We demonstrate that polycrystalline YIG gives rise to antiferromagnetic interlayer coupling. This work provides valuable insights into designing and controlling magnetic coupling in hybrid structures for spintronic applications.
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Received: 09 July 2025
Revised: 09 July 2025
Accepted manuscript online: 23 July 2025
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PACS:
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75.70.-i
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(Magnetic properties of thin films, surfaces, and interfaces)
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75.30.Et
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(Exchange and superexchange interactions)
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61.05.fj
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(Neutron reflectometry)
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| Fund: This work was supported by the National Key Basic Research Program of China (Grant Nos. 2021YFA1400300 and 2023YFA1610400), the National Natural Science Foundation of China (Grant Nos. 12204268, 52371169, 52130103, and U22A20263), the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2023B1515120015), and the Open Research Fund of Songshan Lake Materials Laboratory (Grant No. 2022SLABFN13). PNR experiments were conducted at the Beamline MR of the Chinese Spallation Neutron Source. |
Corresponding Authors:
Tao Zhu
E-mail: tzhu@iphy.ac.cn
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Cite this article:
He Bai(白鹤), Wei He(何为), Dan Liu(刘丹), Jialiang Li(李嘉亮), Xiao Deng(邓霄), Yuan Sun(孙远), Songwen Xiao(肖松文), Sheng Cheng(成晟), Xiaozhi Zhan(詹晓芝), Jianwang Cai(蔡建旺), and Tao Zhu(朱涛) Characterization of interlayer coupling in YIG/Py bilayer using polarized neutron reflectometry 2025 Chin. Phys. B 34 107509
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