Magnetic anisotropy and critical behavior of the quaternary van der Waals ferromagnetic material Cr0.96Ge0.17Si0.82Te3

Zefang Li; Xue Li; Bei Ding; Hang Li; Yuan Yao; Xuekui Xi; Wenhong Wang

doi:10.1088/1361-648X/ac1882

Magnetic anisotropy and critical behavior of the quaternary van der Waals ferromagnetic material Cr_0.96Ge_0.17Si_0.82Te₃

J Phys Condens Matter. 2021 Aug 11;33(42). doi: 10.1088/1361-648X/ac1882.

Authors

Zefang Li^{1

2}, Xue Li^{1

2}, Bei Ding^{1

2}, Hang Li^{1

2}, Yuan Yao¹, Xuekui Xi¹, Wenhong Wang^{1

3}

Affiliations

¹ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
² University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
³ Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, People's Republic of China.

PMID: 34320476
DOI: 10.1088/1361-648X/ac1882

Abstract

Recently, two-dimensional ferromagnetism in the family of chromium compounds CrXTe₃(X= Si, Ge) has attracted a broad research interest. Despite the structural similarity in CrTe₆octahedra, the size effect of inserted Ge or Si dimer contributes to significant differences in magnetism. Here, we report a new family of quaternary van der Waals ferromagnetic material CrGe_δSi_1-δTe₃(δ< 0.2) synthesized by flux method. Ge substitution in Si site results in the lattice expansion, further increasing the Curie temperature and reducing the magnetic anisotropy. The critical behavior of Cr_0.96Ge_0.17Si_0.82Te₃has been studied by specific heat as well as magnetization measurements. And the extracted critical exponents are self-consistent and well-obeying the scaling laws, which are closer to the 2D Ising model with interaction decaying asJ(r) ≈r^-3.44.

Keywords: 2D magnetic material; critical behavior; magnetic anisotropy.