The effects of Dzyaloshinskii-Moriya interactions on the ferromagnetic resonance response in nanosized devices

• Main Authors: Eason, Kwaku, Feng Kong, Jian, Wei Kho, Zhe, Hin Sim, Cheow, Tran, Michael, Cheng Huang, Jian, Sabino, Maria, Kun He, Shi
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Science::Physics::Atomic physics::Solid state physics
• Online Access: https://hdl.handle.net/10356/105169; http://hdl.handle.net/10220/20453
• Institution: Nanyang Technological University

The effects of Dzyaloshinskii-Moriya interaction (DMI) on the ferromagnetic resonance response are investigated in nanometer-sized disks using 3D micromagnetics with the inclusion of DMI energy. A rich complexity is found in the effects on the spinwave eigenmodes and their behavior when varying parameters. Two distinct results are demonstrated: first, unique DMI modes are found to form, instead of the expected modes forming in the absence of DMI and they can be uniquely accessed using field rotation; and second, modal evolution with the DMI parameter involves distinct modal twisting and rotations.