DataVXChemistry of MaterialsPaper
journal article·2025-01-28

Peculiar Magnetic and Magneto-Transport Properties in a Noncentrosymmetric Self-Intercalated van der Waals Ferromagnet Cr5Te8

Banik Rai, Sandip Kumar Kuila, Rana Saha, Sankalpa Hazra, Chandan De, Jyotirmoy Sau, Venkatraman Gopalan, Partha Pratim Jana, Stuart S. P. Parkin, Nitesh Kumar

Chemistry of Materials· Volume 37· Issue 2
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Source abstract

Abstract

Trigonal Cr 5 Te 8, a self-intercalated van der Waals ferromagnet with an out-of-plane magnetic anisotropy, has long been known to crystallize in a centrosymmetric structure. However, optical second harmonic generation experiments, together with comprehensive structural analysis, indicate that this compound rather adopts a noncentrosymmetric structure. Lorentz transmission electron microscopy reveals the presence of Néel-type skyrmions, consistent with its noncentrosymmetric structure. A large anomalous Hall conductivity of 102 Ω –1 cm –1 at low temperature stems from intrinsic origin, which is larger than any previously reported values in the bulk Cr–Te system. Notably, spontaneous topological Hall resistivity arising from the skyrmionic phase has been observed. Our findings not only elucidate the unique magnetic and magneto-transport properties of noncentrosymmetric trigonal Cr 5 Te 8, but also open new avenues for investigating the effects of broken inversion symmetry on material properties and their potential applications.
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Research context

OpenAlex topics: 2D Materials and Applications · Graphene research and applications · Topological Materials and Phenomena

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Condensed Matter and Materials Physics, S. N. Bose National Centre for Basic Sciences, Salt Lake City, Kolkata 700106, India

Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India

Max Planck Institute of Microstructure Physics, Weinberg 2, Halle (Saale) 06120, Germany

Department of Chemistry, Indian Institute of Science Education and Research, Yerpedu, Tirupati 517619, India

Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

2D Crystal Consortium, Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Funding

Council of Scientific and Industrial Research, India · Science and Engineering Research Board · Department of Science and Technology, Ministry of Science and Technology, India · Max-Planck-Gesellschaft

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