Dzyaloshinsky–Moriya Interaction Induced Anomalous g Behavior of Sr2IrO4 Probed by Electron Spin Resonance

Among the 5d transition metal iridates, Sr2IrO4, which has a layered chalcogenide structure, has received much attention due to its strong spin–orbit coupling (SOC), which produces Mott insulating states and anomalous physical behaviors. In this paper, the microscopic magnetism of Sr2IrO4 is studied...

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Bibliographic Details
Published in:Magnetochemistry 2023-11, Vol.9 (11), p.231
Main Authors: Wang, Kai, Yan, Liqin, Shi, Youguo, Shen, Baogen, He, Lunhua, Wang, Fangwei, Lu, Jun, Zhao, Tongyun, Lu, Zunming
Format: Article
Language:English
Subjects:
Dzyaloshinsky–Moriya interaction
Electron paramagnetic resonance
Electron spin
electron spin resonance
Electrons
Ferromagnetic resonance
Ferromagnetism
Magnetic fields
Magnetism
Physical properties
Physics
Single crystals
Spin resonance
Spin-orbit interactions
Sr2IrO4
Temperature
Transition metals
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Summary:Among the 5d transition metal iridates, Sr2IrO4, which has a layered chalcogenide structure, has received much attention due to its strong spin–orbit coupling (SOC), which produces Mott insulating states and anomalous physical behaviors. In this paper, the microscopic magnetism of Sr2IrO4 is studied with electron spin resonance (ESR) measurements. The Lande factor g of the ferromagnetic resonance signal of Sr2IrO4 shows anomalous behavior compared to typical ferromagnets. It gradually decreases, and the corresponding resonance field Hr increases, with decreasing temperature. The various physical parameters. including the saturated magnetic field Hs derived from M-H, Hr, ΔHpp, the g factor and the intensity I extracted from ESR spectra, are analyzed in detail. Eventually, it is revealed that the anomalous behavior of the g-factor is induced by in-plane Dzyaloshinsky–Moriya interaction (DMI) rather than the SOC effect.
ISSN:2312-7481
2312-7481
DOI:10.3390/magnetochemistry9110231