Mr
Jilei Chen
(Institute of Materials and Laboratory of Nanoscale Magnetic Materials and Magnonics, École polytechnique fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland)
The chiral-lattice ferrimagnet Cu2OSeO3 has been evidenced to exhibit a second skyrmion phase stabilized by cubic anisotropy well below 57K. It is particularly interesting when aiming at an experimental investigation of magnon band structures in skyrmion lattices and their potential application for microwave devices operating at GHz frequencies. We explored spin excitations in a Cu2OSeO3 single crystal by broadband GHz spectroscopy by high field cooling down. Beyond modes attributed to the conventional low-temperature helical, conical and ferrimagnetic phases, we observe a further weak resonance at a relatively low frequency of about 1.5 GHz which might hint towards excitation of the second skyrmion phase. The work is supported by SNSF via grant 171003 (sinergia project Nanoskyrmionics).
Mr
Jilei Chen
(Institute of Materials and Laboratory of Nanoscale Magnetic Materials and Magnonics, École polytechnique fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland)
Mr
Mohammad Hamdi
(Institute of Materials and Laboratory of Nanoscale Magnetic Materials and Magnonics, École polytechnique fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland)
Ping Che
(Institute of Materials and Laboratory of Nanoscale Magnetic Materials and Magnonics, École polytechnique fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland)
Baral P. R.
(Chair of Computational Condensed Matter Physics, Intitut de Physique, École polytechnique fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland and Crystal Growth Facility, Institut de Physique, École polytechnique fédérale de Lausanne(EPFL), 1015 Lausanne, Switzerland)
A. Magrez
(Crystal Growth Facility, Institut de Physique, École polytechnique fédérale de Lausanne(EPFL), 1015 Lausanne, Switzerland)
Dirk Grundler
(Institute of Materials and Laboratory of Nanoscale Magnetic Materials and Magnonics, École polytechnique fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland)
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