Sohail Ahmed1 Xiang Ding1 Nina Bao2 Pengju Bian3 Rongkun Zheng3 Yiren Wang1 Peter Murmu4 John Kennedy4 Rong Liu5 Haiming Fan6 Kiyonori Suzuki7 Jun Ding2 Jiabao Yi1

1, University of New South Wales, Sydney, New South Wales, Australia
2, National University of Singapore, Singapore, , Singapore
3, The University of Sydney, Sydney, New South Wales, Australia
4, National Isotope Centre, Lower Hutt, , New Zealand
5, Western Sydney University, Sydney, New South Wales, Australia
6, Northwest University, Shaanxi, , China
7, Monash University, Melbourne, Victoria, Australia

MoS2 nanosheets were doped with vanadium (V) with a variety of concentrations using a hydrothermal method. Raman, X-ray photoelectron spectroscopy and electron paramagnetic resonance results indicate the effective substitutional doping in MoS2. Without V doping, oxides such as MoO2 and MoO3 have been observed, whereas, with 5 at% V doping, the oxide disappears. Magnetic measurements show that room temperature ferromagnetism has been induced by V doping. Magnetization tends to increase with the increased V doping concentration. A very large coercivity up to 1.87 kOe has been observed in 5 at% vanadium doped MoS2, which may attribute to a combination effect of localized charge transfer between V and S ions, pinning effect due to the in-between defects, stress induced by doping and shape anisotropy due to two-dimensional nature of MoS2 ribbons