Hybrid magnetization dynamics in $\text{Cu}_\text{2}\text{OSeO}_\text{3}$/$\mathrm{NiFe}$ heterostructures

Carolina Lüthi; Luis Flacke; Aisha Aqeel; Akashdeep Kamra; Rudolf Gross; Christian Back; Mathias Weiler

doi:10.1063/5.0128733

Hybrid magnetization dynamics in $\text{Cu}_\text{2}\text{OSeO}_\text{3}$/$\mathrm{NiFe}$ heterostructures

Mesoscale and Nanoscale Physics 2023-01-10 v1

Authors: Carolina Lüthi , Luis Flacke , Aisha Aqeel , Akashdeep Kamra , Rudolf Gross , Christian Back , Mathias Weiler

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Abstract

We investigate the coupled magnetization dynamics in heterostructures of a single crystal of the chiral magnet $\mathrm{Cu_2OSeO_3}$ (CSO) and a polycrystalline ferromagnet $\mathrm{NiFe}$ (Py) thin film using broadband ferromagnetic resonance (FMR) at cryogenic temperatures. We observe the excitation of a hybrid mode (HM) below the helimagnetic transition temperature of CSO. This HM is attributed to the spin dynamics at the CSO/Py interface. We study the HM by measuring its resonance frequencies for in plane rotations of the external magnetic field. We find that the HM exhibits dominantly four-fold anisotropy, in contrast to the FMR of CSO and Py.

Keywords

magnetic anisotropy magnetic structure frustrated magnetism

Cite

@article{arxiv.2210.00897,
  title  = {Hybrid magnetization dynamics in $\text{Cu}_\text{2}\text{OSeO}_\text{3}$/$\mathrm{NiFe}$ heterostructures},
  author = {Carolina Lüthi and Luis Flacke and Aisha Aqeel and Akashdeep Kamra and Rudolf Gross and Christian Back and Mathias Weiler},
  journal= {arXiv preprint arXiv:2210.00897},
  year   = {2023}
}

Hybrid magnetization dynamics in $\text{Cu}_\text{2}\text{OSeO}_\text{3}$/$\mathrm{NiFe}$ heterostructures

Abstract

Keywords

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