Three-Dimensional Dynamics of a Magnetic Hopfion Driven by Spin Transfer Torque

Liu, Yizhou; Hou, Wentao; Han, Xiufeng; Zang, Jiadong

doi:10.1103/PhysRevLett.124.127204

Three-Dimensional Dynamics of a Magnetic Hopfion Driven by Spin Transfer Torque

Journal Article · Thu Mar 26 00:00:00 EDT 2020 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.124.127204· OSTI ID:1631266

Liu, Yizhou ^[1]; Hou, Wentao ^[2]; Han, Xiufeng ^[3]; Zang, Jiadong ^[4]

Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics; University of New Hampshire
Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics and Astronomy
Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics and Center of Materials Science and Optoelectronics Engineering; Songshan Lake Materials Lab., Guangdong (China)
Univ. of New Hampshire, Durham, NH (United States). Dept. of Physics and Astronomy and Materials Science Program

Magnetic hopfion is a three-dimensional (3D) topological soliton with novel spin structure that would enable exotic dynamics. Herein, we observe and research the current-driven 3D dynamics of a magnetic hopfion with a unit Hopf index in a frustrated magnet. Attributed to the spin Berry phase and symmetry of the hopfion, the phase space entangles multiple collective coordinates, thus the hopfion exhibits rich dynamics including longitudinal motion along the current direction, transverse motion perpendicular to the current direction, rotational motion, and dilation. Furthermore, the characteristics of hopfion dynamics is determined by the ratio between the nonadiabatic spin transfer torque parameter and the damping parameter. Such peculiar 3D dynamics of magnetic hopfion could shed light on understanding the universal physics of hopfions in different systems and boost the prosperous development of 3D spintronics.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of New Hampshire, Durham, NH (United States)

Sponsoring Organization:: National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: SC0020221

OSTI ID:: 1631266

Alternate ID(s):: OSTI ID: 1606579

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 124; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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