ISIS Neutron and Muon Source Data Journal

Study of Local Magnetism of Magnetic Dopants in Topological Insulator Bi2Se3 by MUSR

Abstract: Topological insulators (TIs), which are insulating in bulk and conducting on surface due to a protected time-reversal symmetry (TRS), have become of great interest recently. The TRS can be broken by elemental magnetic doping. 3D TI Bi2Se3 is one such example. One attractive direction could be the use of nanostructures, wherein the surface-to-volume ratio is high. Recently, we synthesized Co- and Dy-doped Bi2Se3 hexagonal nanoplates (NP's). Magnetization measurements indicated the occurrence of a ferromagnetic phase at very low temperatures (T), while the NP's are diamagnetic or paramagnetic otherwise. Weak Co and strong Dy moments were found to accompany this behaviour. Thus, there is an unsystematic magnetic behaviour of the NP’s. We propose measurements of local magnetic properties using MUSR at varying T and magnetic field to gain further insight into the problem.

Principal Investigator: Dr Sanjeev Kumar Srivastava
Experimenter: Dr Adrian Hillier
Local Contact: Dr Mark Telling
Experimenter: Miss Anu Gupta

DOI: 10.5286/ISIS.E.RB1768023

ISIS Experiment Number: RB1768023

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Sanjeev Kumar Srivastava et al; (2017): Study of Local Magnetism of Magnetic Dopants in Topological Insulator Bi2Se3 by MUSR, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1768023

Data is released under the CC-BY-4.0 license.