ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
The search for long range exchange interactions in the S=1 square lattice antiferromagnet La2NiO4
Abstract: Exchange interactions in insulators can be understood in terms of the Andersen exchange picture in which the Hamiltonian has two contributions: (i) a kinetic term characterized by a hopping energy, t, between nearest neighbour Ni or Cu sites and (ii) a potential energy term, U, being the energy penalty for adding an additional electron on a given site. Within this picture, one can view antiferromagnetic exchange as arising from virtual hopping between sites. Experiments by Coldea et al on S=1/2 square latice antiferromagnet La2CuO4 showed that four-hop processes give rise to significant long range exchange interactions. Here we will search to see whether similar effect persist in S=1 analogue La2NiO4.
Public release date: 06 December 2012
Principal Investigator: Professor Stephen Hayden
Experimenter: Professor Andrew Boothroyd
DOI: 10.5286/ISIS.E.24078704
ISIS Experiment Number: RB920380
Part Number: 1 - MAPS
Date of Experiment: 26 November 2009
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 Hayden et al; (2009): The search for long range exchange interactions in the S=1 square lattice antiferromagnet La2NiO4, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.24078704
Data is released under the CC-BY-4.0 license.
