ISIS Neutron and Muon Source Data Journal

Probing the ground state magnetism at the local scale of an unusual metallic pyrochlore Pb2-xCdxIr2O7-d;

Abstract: Common d5 pyrochlore iridates, A2Ir2O7 or A2Ir2O6O’, are reported to have long range magnetic order based on muSR experiment. Only Pr2Ir2O7 has been identified as a metallic spin liquid. The lone d4 pyrochlore Pb2Ir2O7-d; appears different due to nonmagnetic Pb at A-site and high vacancy tolerance at O’ site due to Pb 6s2 lone pair. This large oxygen vacancy ensures presence of Ir4+ and Ir5+, but the susceptibility shows a paramagnet-like trend with negative theta. Moreover, the system shows a non-T2-type metallic resistivity. To tune the Ir4+ and Ir5+ ratio by controlling the vacancy content, lower sized Cd cation is doped at the Pb site (Pb2-xCdxIr2O7-d; with x=0, 0.5, 0.8) which reduces moment by increasing Ir5+ (J=0) content but the susceptibility remained similar. Hence the local magnetic structure in Pb2Ir2O7-d; and its evolution with Cd-doping will be worth investigating by muSR.

Principal Investigator: Dr Sugata Ray
Local Contact: Dr Pabitra Biswas
Experimenter: Mr Rafikul Ali Saha
Experimenter: Mr MdSalman Khan
Experimenter: Professor Fabrice Bert

DOI: 10.5286/ISIS.E.RB1920490

ISIS Experiment Number: RB1920490

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 Sugata Ray et al; (2019): Probing the ground state magnetism at the local scale of an unusual metallic pyrochlore Pb2-xCdxIr2O7-d;, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1920490

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