Year: 2025
Type: article
Abstract: 2D MoS 2 holds great promise for spintronics, yet is limited by intrinsic diamagnetism. This study demonstrates inducing ferromagnetic behavior in MoS 2 films doped with 0.47% Gd, achieving an ultrahigh saturation magnetization of 454 emu/cm 3 in a few‐layered film over 11‐times higher than bulk films (40 nm). Raman spectroscopy, X‐ray photoelectron spectroscopy, X‐ray magnetic circular dichroism, and density functional theory (DFT) calculations reveal an interplay between Gd dopants and Mo, S vacancies (V 1Mo+2S ), leading to the formation of bound magnetic polarons (BMPs) that drive ferromagnetic ordering. H 2 S annealing and DFT calculations reveal that defect healing reduces the saturation magnetization by 83%. High sulfur migration barrier in few‐layered films helps preserve BMPs, thereby sustaining ferromagnetism, whereas lower migration barriers in bulk films lead to suppression. These findings highlight the synergy between Gd doping and defect engineering in achieving ultrahigh room‐temperature ferromagnetism, offering a scalable strategy for developing high‐performance 2D magnetic materials for spintronic applications.
Source: Advanced Science
Authors: Aswin kumar Anbalagan, Weng‐Kent Chan, Ming‐Hsuan Wu, Fang‐Chi Hu, Hsin‐Hao Chiu, Amr Sabbah, Mayur Chaudhary, Shivam Gupta, Kai‐Wei Chuang, Ashish Chhaganlal Gandhi, Ching‐Yu Chiang, Huang‐Ming Tsai, Shu‐Chih Haw, Kirankumar Venkatesan Savunthari, Hong‐Ji Lin, Li‐Chyong Chen, Kuei‐Hsien Chen, Nyan‐Hwa Tai, Yu‐Lun Chueh, Sheng Yun Wu, Hsin‐Yi Tiffany Chen, Andrew L. Walter, Chih‐Hao Lee
Institutions: Brookhaven National Laboratory, National Tsing Hua University, National Synchrotron Light Source II, National Dong Hwa University, National Taiwan University, Institute of Atomic and Molecular Sciences, Academia Sinica, Academia Sinica, Southern Methodist University, National Synchrotron Radiation Research Center, Northeastern University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,730
Awards: G1285306620, G241279073, Development of Modelling Tools and Descriptors for Doped and Adsorbed High-Entropy Materials and Their Case Studies, G2650288616, G3262563802, G357145406, G4710924577, Low-Carbon Hydrogen Energy Carrier Design: Mechanistic Understanding, Descriptor Development and Integrated Web-Based Vi Sual Database Platform, G5113204789, G5765906131, G737270210, G7463374569, G8240329340
OpenAlex ID: W4413836644