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Interior and Edge Magnetization in Thin Exfoliated CrGeTe(3) Films

[Image: see text] CrGeTe(3) (CGT) is a semiconducting vdW ferromagnet shown to possess magnetism down to a two-layer thick sample. Although CGT is one of the leading candidates for spintronics devices, a comprehensive analysis of CGT thickness dependent magnetization is currently lacking. In this wo...

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Detalles Bibliográficos
Autores principales: Noah, Avia, Alpern, Hen, Singh, Sourabh, Gutfreund, Alon, Zisman, Gilad, Feld, Tomer D., Vakahi, Atzmon, Remennik, Sergei, Paltiel, Yossi, Huber, Martin Emile, Barrena, Victor, Suderow, Hermann, Steinberg, Hadar, Millo, Oded, Anahory, Yonathan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9011403/
https://www.ncbi.nlm.nih.gov/pubmed/35271282
http://dx.doi.org/10.1021/acs.nanolett.1c04665
Descripción
Sumario:[Image: see text] CrGeTe(3) (CGT) is a semiconducting vdW ferromagnet shown to possess magnetism down to a two-layer thick sample. Although CGT is one of the leading candidates for spintronics devices, a comprehensive analysis of CGT thickness dependent magnetization is currently lacking. In this work, we employ scanning SQUID-on-tip (SOT) microscopy to resolve the magnetic properties of exfoliated CGT flakes at 4.2 K. Combining transport measurements of CGT/NbSe(2) samples with SOT images, we present the magnetic texture and hysteretic magnetism of CGT, thereby matching the global behavior of CGT to the domain structure extracted from local SOT magnetic imaging. Using this method, we provide a thickness dependent magnetization state diagram of bare CGT films. No zero-field magnetic memory was found for films thicker than 10 nm, and hard ferromagnetism was found below that critical thickness. Using scanning SOT microscopy, we identify a unique edge magnetism, contrasting the results attained in the CGT interior.