Giant magnetic anisotropy in the atomically thin van der Waals antiferromagnet FePS3

Youjin Lee; Suhan Son; Chaebin Kim; Soonmin Kang; Junying Shen; Michel Kenzelmann; Bernard Delley; Tatiana Savchenko; Sergii Parchenko; Woongki Na; Ki-Young Choi; Wondong Kim; Hyeonsik Cheong; Peter M. Derlet; Armin Kleibert; Je-Geun Park

arXiv · 2211.05381

Giant magnetic anisotropy in the atomically thin van der Waals antiferromagnet FePS3

Youjin Lee·Suhan Son·Chaebin Kim·Soonmin Kang·Junying Shen·Michel Kenzelmann·Bernard Delley·Tatiana Savchenko·Sergii Parchenko·Woongki Na·Ki-Young Choi·Wondong Kim·Hyeonsik Cheong·Peter M. Derlet·Armin Kleibert·Je-Geun Park

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Abstract

Van der Waals (vdW) magnets are an ideal platform for tailoring two-dimensional (2D) magnetism with immense potential for spintronics applications and are intensively investigated. However, little is known about the microscopic origin of magnetic order in these antiferromagnetic systems. We used X-ray photoemission electron microscopy to address the electronic and magnetic properties of the vdW antiferromagnet FePS3 down to the monolayer. Our experiments reveal a giant out-of-plane magnetic anisotropy of 22 meV per Fe ion, accompanied by unquenched magnetic orbital moments. Moreover, our calculations suggest that the Ising magnetism in FePS3 is a visible manifestation of spin-orbit entanglement of the Fe 3d electron system.

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Youjin Lee, Suhan Son, Chaebin Kim, Soonmin Kang, Junying Shen, Michel Kenzelmann, Bernard Delley, Tatiana Savchenko, Sergii Parchenko, Woongki Na, Ki-Young Choi, Wondong Kim, Hyeonsik Cheong, Peter M. Derlet, Armin Kleibert, Je-Geun Park. 2022-11-10. Giant magnetic anisotropy in the atomically thin van der Waals antiferromagnet FePS3. https://arxiv.org/abs/2211.05381

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