Magnetic dynamics across the in-field transition in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">Ca</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Co</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math>

Hegde, Nagabhushan G.; Levatić, Ivana; Magrez, Arnaud; Rønnow, Henrik M.; Živković, Ivica

doi:10.1103/physrevb.102.104418

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…1. This implies that the step to saturation is also delayed by slow dynamics, as discussed recently [31].…”

Section: History Necessary To Reach the Metastable Step State Or The ...mentioning

confidence: 76%

Reaching the equilibrium state of frustrated triangular Ising magnet Ca3Co2O6

Nekrashevich,

Ding,

Balakirev

et al. 2021

Preprint

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Ca 3 Co 2 O 6 is a frustrated magnet consisting of a triangular arrangement of chains of Ising spins. It shows regular magnetization steps vs magnetic field every 1.2 T that are metastable with very slow dynamics. This has puzzled the community for many years and given rise to numerous potential theories. Here we approach the problem by seeking the elusive magnetic equilibrium state at T = 2 K. To this end, we explore two approaches:(1) bypassing the slow dynamics produced by changing fields by instead field-cooling directly to the target temperature, and (2) quantum annealing in transverse magnetic fields. While we observe no measurable effect of the quantum annealing in fields up to 7 T, which is likely due to the large Ising anisotropy of Co spins in this material, we find that for the field cooling in longitudinal fields we achieve the predicted equilibrium 1/3 magnetization. We perform Monte Carlo simulations of the ground state phase diagram and we also simulate the quantum annealing process and find good agreement between experiment and theory. Thus we present an investigation of the elusive ground state properties of the canonical frustrated triangular system Ca 3 Co 2 O 6 .

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“…1. This implies that the step to saturation is also delayed by slow dynamics, as discussed recently [31].…”

Section: History Necessary To Reach the Metastable Step State Or The ...mentioning

confidence: 76%

Reaching the equilibrium state of frustrated triangular Ising magnet Ca3Co2O6

Nekrashevich,

Ding,

Balakirev

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…QTM is a well-known process in single-molecule magnets, however, to the best of our knowledge, among inorganic crystals there are only few well-documented examples including Dy 2 Ti 2 O 7 [7][8][9][10][11][12] and Ca 3 Co 2 O 6 [13,14]. In both cases, the strong CEF produces large uniaxial anisotropy, which freezes magnetic moments below a crossover temperature T * ≈ 13 and ≈9 K, for Dy 2 Ti 2 O 7 and Ca 3 Co 2 O 6 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Slow spin dynamics and quantum tunneling of magnetization in the dipolar antiferromagnet DyScO3

et al. 2022

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We present a comprehensive study of static and dynamic magnetic properties in the Ising-like dipolar antiferromagnet (AFM) DyScO 3 by means of DC and AC magnetization measurements supported by classical Monte Carlo calculations. Our AC-susceptibility data show that the magnetic dynamics exhibit a clear crossover from an Arrhenius-like regime to quantum tunneling of magnetization (QTM) at T * = 10 K. Below T N = 3.2 K, DyScO 3 orders in an antiferromagnetic GxAy-type magnetic structure and the magnetization dynamics slow down to the minute timescale. The low-temperature magnetization curves exhibit complex hysteretic behavior, which depends strongly on the magnetic field sweep rate. We demonstrate that the low-field anomalies on the magnetization curve are related to the metamagnetic transition, while the hysteresis at higher fields is induced by a strong magnetocaloric effect. Our theoretical calculations, which take into account dipolar interaction between Dy 3+ moments, reproduce essential features of the magnetic behavior of DyScO 3 . We demonstrate that DyScO 3 represents a rare example of an inorganic compound, which exhibits QTM at a single-ion level and magnetic order due to classical dipolar interaction.

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“…QTM is a well-known process in single-molecule magnets, however to the best of our knowledge, among inorganic crystals there are only few well-documented examples including Dy 2 Ti 2 O 7 [7][8][9][10][11][12] and Ca 3 Co 2 O 6 [13,14]. In both cases, the strong CEF produces large uniaxial anisotropy, which freezes magnetic moments below a crossover temperature T * ≈ 13 and T * ≈ 9 K, for Dy 2 Ti 2 O 7 and Ca 3 Co 2 O 6 respectively.…”

Section: Introductionmentioning

confidence: 99%

Slow spin dynamics and quantum tunneling of magnetization in the dipolar antiferromagnet DyScO$_3$

Andriushin,

Nikitin,

Ehlers

et al. 2022

Preprint

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We present a comprehensive study of static and dynamic magnetic properties in the Ising-like dipolar antiferromagnet (AFM) DyScO 3 by means of DC and AC magnetization measurements supported by classical Monte-Carlo calculations. Our AC-susceptibility data show that the magnetic dynamics exhibit a clear crossover from an Arrhenius-like regime to quantum tunneling of magnetization (QTM) at T * = 10 K. Below T N = 3.2 K DyScO 3 orders in an antiferromagnetic G xAy-type magnetic structure and the magnetization dynamics slow down to the minute timescale. The low-temperature magnetization curves exhibit complex hysteretic behavior, which depends strongly on the magnetic field sweep rate. We demonstrate that the lowfield anomalies on the magnetization curve are related to the metamagnetic transition, while the hysteresis at higher fields is induced by a strong magnetocaloric effect. Our theoretical calculations, which take into account dipolar interaction between Dy 3+ moments, reproduce essential features of the magnetic behavior of DyScO 3 . We demonstrate that DyScO 3 represents a rare example of inorganic compound, which exhibits QTM at a single-ion level and magnetic order due to classical dipolar interaction.

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Magnetic dynamics across the in-field transition in Ca3Co2O6

Cited by 6 publications

References 26 publications

Reaching the equilibrium state of frustrated triangular Ising magnet Ca3Co2O6

Reaching the equilibrium state of frustrated triangular Ising magnet Ca3Co2O6

Slow spin dynamics and quantum tunneling of magnetization in the dipolar antiferromagnet DyScO3

Slow spin dynamics and quantum tunneling of magnetization in the dipolar antiferromagnet DyScO$_3$

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