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   https://doi.org/10.1038/s42005-023-01298-7  

   Montoya, Eric Arturo; Khan, Amanatullah; Safranski, Christopher; Smith, Andrew; Krivorotov, Ilya N. (July 2023, Communications Physics)

   Abstract Spin Hall oscillators (SHOs) based on bilayers of a ferromagnet (FM) and a non-magnetic heavy metal (HM) are electrically tunable nanoscale microwave signal generators. Achieving high output power in SHOs requires driving large-amplitude magnetization dynamics by a direct spin Hall current. Here we present an SHO engineered to have easy-plane magnetic anisotropy oriented normal to the bilayer plane, enabling large-amplitude easy-plane dynamics driven by spin Hall current. Our experiments and micromagnetic simulations demonstrate that the easy-plane anisotropy can be achieved by tuning the magnetic shape anisotropy and perpendicular magnetic anisotropy in a nanowire SHO, leading to a significant enhancement of the generated microwave power. The easy-plane SHO experimentally demonstrated here is an ideal candidate for realization of a spintronic spiking neuron. Our results provide an approach to design of high-power SHOs for wireless communications, neuromorphic computing, and microwave assisted magnetic recording. 

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2. Observation of anti-damping spin–orbit torques generated by in-plane and out-of-plane spin polarizations in MnPd3

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3. Out-of-plane chiral domain wall spin-structures in ultrathin in-plane magnets

   https://doi.org/10.1038/ncomms15302  

   Chen, Gong; Kang, Sang Pyo; Ophus, Colin; N’Diaye, Alpha T.; Kwon, Hee Young; Qiu, Ryan T.; Won, Changyeon; Liu, Kai; Wu, Yizheng; Schmid, Andreas K. (May 2017, Nature Communications)
4. Anomalous low-frequency conductivity in easy-plane XXZ spin chains

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   Agrawal, Utkarsh; Gopalakrishnan, Sarang; Vasseur, Romain; Ware, Brayden (June 2020, Physical Review B)

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5. Spin Pumping of an Easy-Plane Antiferromagnet Enhanced by Dzyaloshinskii–Moriya Interaction

   https://doi.org/10.1103/PhysRevLett.127.117202  

   Wang, Hailong; Xiao, Yuxuan; Guo, Mingda; Lee-Wong, Eric; Yan, Gerald Q.; Cheng, Ran; Du, Chunhui Rita (September 2021, Physical Review Letters)