Dynamic spin fluctuations in the frustrated A -site spinel CuAl2 O4

Hwanbeom Cho; R. Nirmala; Jaehong Jeong; Peter J. Baker; Hikaru Takeda; Nobuyoshi Mera; Stephen J. Blundell; Masashi Takigawa; D. T. Adroja; Je Geun Park

doi:10.1103/PhysRevB.102.014439

Dynamic spin fluctuations in the frustrated A -site spinel CuAl2 O4

Hwanbeom Cho, R. Nirmala, Jaehong Jeong, Peter J. Baker, Hikaru Takeda, Nobuyoshi Mera, Stephen J. Blundell, Masashi Takigawa, D. T. Adroja, Je Geun Park

Physics

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

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.

Original language	English
Article number	014439
Journal	Physical Review B
Volume	102
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.102.014439
Publication status	Published - 1 Jul 2020

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Dynamic spin fluctuations in the frustrated A -site spinel CuAl2 O4",

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.",

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AU - Cho, Hwanbeom

AU - Nirmala, R.

AU - Jeong, Jaehong

AU - Baker, Peter J.

AU - Takeda, Hikaru

AU - Mera, Nobuyoshi

AU - Blundell, Stephen J.

AU - Takigawa, Masashi

AU - Adroja, D. T.

AU - Park, Je Geun

PY - 2020/7/1

Y1 - 2020/7/1

N2 - 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.

AB - 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.

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JO - Physical Review B

JF - Physical Review B

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Dynamic spin fluctuations in the frustrated A -site spinel CuAl2 O4

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