ISIS Neutron and Muon Source Data Journal

Strain-induced antiferromagnetic transition in CaMnO3 Thin Films

Abstract: Bulk CaMnO3 (CMO) is a canted G-type antiferromagnet. Theoretical calculations reveal a strain-induced transition to A-type antiferromagnetic ordering when grown in thin-film on SrTiO3 (STO) or LaAlO3 (LAO) substrates leading to a net uncompensated interfacial moment. HAADF-HRSTEM measurements reveal a sharp strained interfacial region, while magnetometry reveals a large average saturation magnetization which decreases with film thickness. Polarized neutron reflectometry will allow us to measure the depth-dependent saturation magnetization in thin CMO films to attribute the observed magnetism to strain at the film-substrate interface. We will compare samples grown on different substrates (STO vs. LAO) and of different thicknesses (3 nm vs. 30 nm) to verify the effects of strain and film relaxation.

Principal Investigator: Dr Purnima Parvathy Balakrishnan
Local Contact: Dr Christy Kinane
Experimenter: Dr Alexander Grutter
Experimenter: Dr Andrew Caruana
Experimenter: Mr Agustin Lopez Pedroso
Experimenter: Professor Dame Laura Steren
Experimenter: Professor Sean Langridge

DOI: 10.5286/ISIS.E.RB2210103

ISIS Experiment Number: RB2210103

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 Purnima Parvathy Balakrishnan et al; (2022): Strain-induced antiferromagnetic transition in CaMnO3 Thin Films, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2210103

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