Preparation and magnetic properties of two-dimensional Cr2S3 nanosheets by chemical vapor deposition

Abstract

Two-dimensional Cr2S3 nanosheets were successfully prepared by using chromium trichloride and sulfur powder as raw materials with atmospheric pressure chemical vapor deposition (CVD), and the surface morphology, crystal structure, and macroscopic magnetic properties of Cr2S3 nanosheets were systematically investigated. The results show that the optical morphology of two-dimensional Cr2S3 nanosheets is mainly triangular, with the maximum size of 156.8 μm and the minimum thickness of 2.59 nm (about 2 unit-cell thickness); the crystal structure is rhombohedral phase structure, similar to monoclinic NiAs-type crystal structure; the magnetic test shows that the two-dimensional Cr2S3 in rhombohedral phase is ferromagnetic material at low temperature, with the magnetic easy axis direction in-plane, and its Néel temperature is about equal to 120 K. The saturation magnetization intensity is maximum at 75 K. The magnetic properties of two-dimensional Cr2S3 nanosheets remain very good after one month in air, and it is an environmentally stable two-dimensional magnetic material.

Keywords

• chemical vapor deposition
• cr2s3
• ferromagnetic
• nonlayered
• environmental stability