Nano-Magnetism Lab.

Welcome

Test. We study the magnetism and magnetic dynamics in restricted symmetry systems.
The restricted symmetry systems include spatially confined system (nano structure), low dimensional systems where limited translational symmetry applies, systems without inversions symmetry including asymmetric exchange interaction(Dzyaloshinskii Moriya interaction), coupled systems with non-uniform magnetic moments, magnetic heterostructures, complex spin structures, and etc
In the restricted symmetry systems, rich magnetic phenomena occur due to various enhanced interactions such as asymmetric exchange interaction, high order anisotropies, dipolar interaction.
The rich mangetic behaviors are affected by external field, electric current and temperature, which we also investigate the mechanism. And these effects are related with applications using spin current, or spintronics.
To do research, we use our own lab-built programs which uses Monte-Calro method, Lagevin dynamics, Landau Lifshitz dynamics and more.
We also work with experiment groups at Physics Department, Fudan University in China and SPLEEM group in LBNL, USA.

Members

• 원창연 Changyeon Won : Associate Professor

• 윤한규 Han Gyu Yoon : PhD Candidate

• 박성민 Seong Min Park : Graduate Student

• 이두봉 Doo Bong Lee : Graduate Student
  

Publications

2013-Present

• Interpolation and extrapolation between the magnetic chiral states using autoencoder
  - HG Yoon, C Lee, DB Lee, SM Park, JW Choi, HY Kwon, C Won , Computer Physics Communications (2022)

• Estimating the effective fields of spin configurations using a deep learning technique
  - DB Lee, HG Yoon, SM Park , JW Choi, HY Kwon, C Won , Scientific reports (2021)

• Chirality-induced zigzag domain wall in in-plane magnetized ultrathin films
  -G Chen, MC Robertson, H Kwon, C Won, AK Schmid, K Liu , Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films(2021)

• Shock-wave-like emission of spin waves induced by interfacial Dzyaloshinskii-Moriya interaction
  -H Xia, H Chen, C Won, H Zhao, Y Wu , arXiv preprint arXiv (2021)

• Multi-domain ferromagnetic resonance in magnetic van der Waals crystals CrI3 and CrBr3
  -X Shen, H Chen, Y Li, H Xia, F Zeng, J Xu, HY Kwon, Y Ji, C Won , Journal of Magnetism and Magnetic Materials (2021)

• Magnetic State Generation using Hamiltonian Guided Variational Autoencoder with Spin Structure Stabilization
  -HY Kwon, HG Yoon, SM Park, DB Lee, JW Choi, C Won , Advanced Science (2021)

• High-density Néel-type magnetic skyrmion phase stabilized at high temperature
  -HY Kwon, KM Song, J Jeong, AY Lee, SY Park, J Kim, C Won, BC Min , NPG Asia Materials (2021)

• Versatile Motion Control of a Magnetic Skyrmion Pair with Spin Transfer Torque
  -NJ Kim, SP Kang, C Lee, HG Yoon, HY Kwon, C Won , Journal of the Korean Physical Society (2020)

• Magnetic Hamiltonian parameter estimation using deep learning technique
  - HY Kwon, HG Yoon, C Lee, G Chen, K Liu, AK Schmid, YZ Wu, JW Choi, C Won , Science advances(2020)

• In-plane Néel wall chirality and orientation of interfacial Dzyaloshinskii-Moriya vector in magnetic films
  -MacCallum Robertson, Christopher J Agostino, Gong Chen, Sang Pyo Kang, Arantzazu Mascaraque, Enrique Garcia Michel, Changyeon Won, Yizheng Wu, Andreas K Schmid, Kai Liu , Physical review B (2020)

• Magnetic structures in the locally inverted interlayer coupling region of a bilayer magnetic system
  - C Lee, HY Kwon, NJ Kim, HG Yoon, C Song, DB Lee, JW Choi, YW Son, C Won , JMMM(2020)

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