Issue 23, 2018

Defect mediated magnetic transitions in Fe and Mn doped MoS2

Abstract

We report single-phase syntheses of undoped 2H-MoS2 as well as Mn and Fe doped MoS2 by a facile hydrothermal route. The formation of the 2H-MoS2 phase was confirmed by XRD and was corroborated with Raman spectra. The morphology of the doped and undoped MoS2 nanostructures comprised sheets, as revealed by TEM and STEM images. The fine granular structure was observed by high resolution TEM micrographs. The STEM-EDS results show dopant concentrations of ∼1 atom% corresponding to Mn and Fe in doped MoS2. The undoped MoS2 revealed diamagnetic behavior at room temperature and paramagnetic behavior in the range (100 to 300 K). The Mn-MoS2 sample displayed ferromagnetism below 20 K with a coercive field of ∼50 Oe. Such a sample may be utilized for magnetic switching purposes at low temperatures. The onset of the antiferromagnetic interaction was observed below 145 K in Fe-MoS2 samples. They have been understood in terms of long-range magnetic interactions amongst the dipole moments mediated via surface defects as well as the interaction between the dipoles and the surface charges. The findings are corroborated with the help of EPR studies.

Graphical abstract: Defect mediated magnetic transitions in Fe and Mn doped MoS2

Article information

Article type
Paper
Submitted
06 May 2018
Accepted
17 May 2018
First published
17 May 2018

Phys. Chem. Chem. Phys., 2018,20, 15817-15823

Defect mediated magnetic transitions in Fe and Mn doped MoS2

M. K. Singh, P. Chettri, A. Tripathi, A. Tiwari, B. Mukherjee and R. K. Mandal, Phys. Chem. Chem. Phys., 2018, 20, 15817 DOI: 10.1039/C8CP02882F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements