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Dynamic spin fluctuations in the frustrated A -site spinel CuAl2 O4
Date Issued
01-07-2020
Author(s)
Cho, Hwanbeom
Indian Institute of Technology, Madras
Jeong, Jaehong
Baker, Peter J.
Takeda, Hikaru
Mera, Nobuyoshi
Blundell, Stephen J.
Takigawa, Masashi
Adroja, D. T.
Park, Je Geun
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.
Volume
102