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Dynamic spin fluctuations in the frustrated A-site spinel CuAl2O4

Abstract:
We performed nuclear magnetic resonance (NMR) and muon spin relaxation (μSR) experiments to identify the magnetic ground state of the frustrated quantum A-site spinel, CuAl2O4. Our results verify that the ground state does not exhibit a long-range magnetic ordering, but a glasslike transition manifests at T∗=2.3K. However, the Gaussian shape and the weak longitudinal field dependence of μSR spectra below T∗ show that the ground state has dynamic spin fluctuations, distinct from those of conventional spin glasses.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevB.102.014439

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Subgroup:
Condensed Matter Physics
Role:
Author
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Publisher:
American Physical Society Publisher's website
Journal:
Physical Review B Journal website
Volume:
102
Article number:
014439
Publication date:
2020-07-21
Acceptance date:
2020-07-06
DOI:
EISSN:
2469-9969
ISSN:
2469-9950
Pubs id:
1124598
Local pid:
pubs:1124598
Language:
English
Keywords:

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