ISIS Neutron and Muon Source Data Journal

Is there magnetic order in intrinsically frustrated rare earth bilayer aluminates?

Abstract: Compounds with formula R2SrAl2O7 (R=rare earth) look superficially similar to the well-known bilayer manganites, but here the perovskite bilayers contain Al and are nonmagnetic. They efficiently separate the rare earth and Sr containing magnetic rock-salt layers. When R=Sm, these rock salt layers contain Sm and Sr in a 2:1 ratio, but because of their different sizes the Sm and Sr cations occupy different sites. The only magnetic ions, Sm3+, then form two, well separated, square 2D lattices lying on top of each other and nearest-neighbour antiferromagnetic interactions imply a magnetic structure which would result in a 2-in, 2-out structure, reminiscent of spin ice. Magnetic measurements do not show magnetic order down to 1.8 K, but the susceptibility indicates competing interactions. Muons can resolve the ground state in this and compounds with other R ions.

Principal Investigator: Professor Stephen Blundell
Experimenter: Ms Franziska Kirschner
Experimenter: Dr Sang-Wook Cheong
Experimenter: Professor Tom Lancaster
Experimenter: Dr Franz Lang
Experimenter: Dr Francis Pratt
Local Contact: Dr Peter Baker

DOI: 10.5286/ISIS.E.RB1810224

ISIS Experiment Number: RB1810224

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 Stephen Blundell et al; (2018): Is there magnetic order in intrinsically frustrated rare earth bilayer aluminates?, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810224

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