Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 27, Pages 31880-31890Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c07680
Keywords
van der Waals; layered; ferromagnetic semiconductor; 2H-MoTe2; doping
Funding
- National Natural Science Foundation of China [61674063, 62074061]
- National Key Research and Development Program of China [2016YFB0700702]
- Foundation of Shenzhen Science and Technology Innovation Committee [JCYJ20180504170444967]
Ask authors/readers for more resources
This paper demonstrates a method to induce intrinsic ferromagnetism in vdW layered 2H-MoTe2 semiconductor by magnetic chromium doping and Te flux strategy, which can tune the Curie temperature and saturation magnetization. The observed ferromagnetism with Cr doping in the Cr-2H-MoTe2 has intrinsic characteristics and offers a new avenue for spintronic and magnetoelectric applications in vdW layered semiconductors.
The intrinsically nonmagnetic feature of van der Waals (vdW) layered transition-metal dichalcogenide (TMDC) semiconductors limits the spintronic applications of these semiconductors. In this paper, we demonstrate a facile Te flux strategy to induce intrinsic ferromagnetism in the vdW layered 2H-MoTe2 semiconductor by magnetic chromium (Cr) doping. The Curie temperature (T-c) and saturation magnetization (M-s) can be well tuned by adjusting the Cr doping concentration. A notable Tc up to 275 K can be achieved for the vdW layered Cr-doped 2H-MoTe2 bulk crystals, which is much higher than that of recently reported van der Waals ferromagnetic semiconductors (Tc is mostly less than 70 K), in contrast to the diamagnetic feature of the pristine MoTe2. Meanwhile, the highest Ms of the vdW layered Cr-doped 2H-MoTe2 bulk crystals can reach 4.78 emu g(-1), which is stronger than most values reported for magnetic-element-doped van der Waals materials. In addition, all of the as-grown semiconducting Cr-doped 2H-MoTe2 (Cr-2H-MoTe2) single crystals display a large magnetic anisotropy with an out-of-plane easy axis of magnetization. The observed ferromagnetism in the Cr-2H-MoTe2 has intrinsic characteristics, which can be mainly attributed to the spin polarization caused by Cr doping as confirmed by the density functional theory (DFT) calculations. Our approach offers an avenue to tune the ferromagnetism in the vdW layered semiconductor and explore its diverse spintronic and magnetoelectric applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available