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Persistent URL
http://purl.org/net/epubs/work/10910895
Record Status
Checked
Record Id
10910895
Title
Hour-glass magnetic spectrum arising from a striped cluster spin-glass ground state in La1.75Sr0.25CoO4
Contributors
SM Gaw
,
EC Andrade
,
M Vojta
,
CD Frost (STFC Rutherford Appleton Lab.)
,
DT Adroja (STFC Rutherford Appleton Lab.)
,
D Prabhakaran
,
AT Boothroyd
Abstract
We report inelastic neutron scattering results that reveal an hour-glass magnetic excitation spectrum in La1.75Sr0.25CoO4. The magnetic spectrum is similar to that observed previously in La1.67Sr0.33CoO4, but the spectral features are broader. We show that the spectrum of La1.75Sr0.25CoO4 can be modelled by the spin dynamics of a system with a disordered cluster spin glass ground state. Bulk magnetization measurements are presented that support the proposed glassy ground state. The observations reiterate the importance of quasi-one-dimensional magnetic correlations and disorder for the hour-glass spectrum, and suggest that disordered spin and charge stripes exist at lower doping in La2-xSrxCoO4 than previously thought.
Organisation
ISIS
,
ISIS-MAPS
,
ISIS-MERLIN
,
STFC
Keywords
Funding Information
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Language
English (EN)
Type
Details
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Year
Journal Article
Phys Rev B
88, no. 16 (2013): 165121.
doi:10.1103/PhysRevB.88.165121
2013
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