ISIS Neutron and Muon Source Data Journal

Search for ferromagnetic quantum critical point in the Weyl semimetal Co3-xNixSn2S2

Abstract: The layered half-metal Co3Sn2S2 with a Kagomé lattice in the a-b plane has been recently discovered as a magnetic Weyl semimetal, whose Weyl nodes are only 60 meV above the charge neutrality point. It is a quasi-2D ferromagnet with TC= 177 K and a magnetic moment at Co sites along c-axis.By doping Ni into Co3Sn2S2 compound, the ferromagnetism is systematically suppressed, and a nearly linear dependence of the resistivity shows in the normal state, suggesting a possible ferromagnetic quantum critical point. We propose to carry out zero-field (ZF) and longitudinal field (LF) µSR measurements on Co3-xNixSn2S2 polycrystalline samples down to 50 mK, to confirm the existence of the ferromagnetic QCP in Co3-xNixSn2S2 system and determine its location of Ni doping level. We request in total 7 days of beam time on the MUSR spectrometer or 9 days on EMU (two days for two times dilution cooling).

Principal Investigator: Dr Hui-Qian Luo
Experimenter: Dr Xiaoyan Ma
Experimenter: Dr Enke Liu
Experimenter: Miss Chang Liu
Local Contact: Dr Pabitra Biswas
Experimenter: Dr Devashi Adroja

DOI: 10.5286/ISIS.E.RB1910200

ISIS Experiment Number: RB1910200

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

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

For Example:
Dr Hui-Qian Luo et al; (2019): Search for ferromagnetic quantum critical point in the Weyl semimetal Co3-xNixSn2S2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910200

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