Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.361
Publication date: 7th February 2022
The development of magnetic semiconductors van der Waals (vdW) materials requires new and sensitive characterization tools, which can provide insights into the optical and magnetic properties including their mutual relationship. These valuable features can be utilized for the new generation of exfoliated 2D magnets and spintronic devices. In recent years, optical spectroscopy using a magnetic field has proven to be a particularly useful technique, enabling to display a clear signature of the underlying magnetic order[1]. Furthermore, optical spectroscopy is a non-contact method with extremely high sensitivity, therefore very suitable for delicate substances. Here, we employ for the first time optical spectroscopy on alloyed/doped antiferromagnetic (AFM) vdW semiconductors. We use the doped system Mn1-xZnxPS3, where MnPS3 is an AFM vdW material and Zn(II) is a non-magnetic transition metal, therefore acts as a “dilution agent”. In this regard, the doped material has previously shown a transformation from anti-ferromagnetism to paramagnetism as the x is reaching a certain level[2]. In this study, we demonstrate that the Neel temperature and other magnetic transitions can be monitored by temperature-dependent photoluminescent (PL), circular-dichroism, and lifetime measurements. We discuss in detail the coupling between optical and magnetic properties, considering the origin of the PL signal. We expect that the study presented here will expand the applicability of optical spectroscopy for magnetic vdW semiconductors.
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