ISIS Neutron and Muon Source Data Journal

Are La3Ni2NbO9 and La3Ni2TaO9 relaxor ferromagnets?

Abstract: A relaxor ferroelectric exhibits a net polarisation only in an applied electric field due to the co-alignment of polar nanoregions. In La3Ni2SbO9 we found the magnetic equivalent to a relaxor ferroelectric in that La3Ni2SbO9 only shows long-range magnetic order when the ferrimagnetic nanoregions are co-aligned in an applied magnetic field. Now we have found two more compounds, La3Ni2NbO9 and La3Ni2TaO9, that could be relaxor ferromagnets. Both appear to contain ferrimagnetic clusters and show no long-range magnetic order in the absence of an applied magnetic field. We propose to collect powder neutron diffraction data on both compounds on WISH in applied fields of 0 kOe, 4 kOe, 20 kOe and 50 kOe at 5K to see if the clusters co-align to give rise to long-range magnetic order and thus confirm that La3Ni2NbO9 and La3Ni2TaO9 are also relaxor ferromagnets.

Principal Investigator: Professor Peter Battle
Experimenter: Dr Emily Giles
Local Contact: Dr Pascal Manuel
Experimenter: Dr Chun Mann Chin

DOI: 10.5286/ISIS.E.RB1810083

ISIS Experiment Number: RB1810083

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:
Professor Peter Battle et al; (2018): Are La3Ni2NbO9 and La3Ni2TaO9 relaxor ferromagnets?, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810083

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