Cluster-glass behavior in the two-dimensional triangular lattice Ising-spin compound 
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Kumar, Rahul; Yanda, Premakumar; Sundaresan, A.

doi:10.1103/physrevb.103.214427

Cited by 18 publications

(6 citation statements)

References 57 publications

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“…For our system, this value is calculated to be δT 3 ∼ 0.024 and δT 4 ∼ 0.084. It is found that the values are in the range of those observed for typical CG systems [68][69][70][71][72]. Therefore, the observed peaks in χ AC seems to be associated with interacting magnetic clusters, leading to a CG state.…”

Section: Ac Susceptibilitymentioning

confidence: 60%

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Yadav,

Singh

et al. 2023

New J. Phys.

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Topological Hall effect (THE) originating from non-trivial spin arrangements in magnetic materials has been extensively investigated in recent years. In this context, a centrosymmetric ternary silicide, DyScSi, is explored. Here we show that, a complex magnetic ground state drives THE in a centrosymmetric system. Temperature dependent magnetisation and neutron diffraction results establish the presence of commensurate antiferromagnetic (AFM) phase around 92 K, followed by an incommensurate AFM phase below 40 K. Additionally, two cluster glass transitions near 20 and 8 K, are also noted. These observed features arise due competing AFM and FM interactions. In conjunction with this, a finite contribution of THE is also observed in the intermediate field regime (8–30 kOe), at low temperature in DyScSi. The behaviour of this silicide appears to be fascinating in terms of interplay between complex magnetic ground state and THE in centrosymmetric structure.

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Section: Ac Susceptibilitymentioning

confidence: 60%

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Yadav,

Singh

et al. 2023

New J. Phys.

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“…The present theory can also provide a useful framework to investigate the enhancement of MCE in new cluster systems with triangular structure [51] and molecular magnets [52] with weak randomness and strong frustration. Our findings suggest that weak disorder leads to changes on the MCE of cluster magnetic systems only at very low temperatures.…”

Section: Discussionmentioning

confidence: 93%

Enhancement of the magnetocaloric effect in geometrically frustrated cluster spin glass systems

Zimmer

Mourão

Schmidt

et al. 2023

J. Phys.: Condens. Matter

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In this work, we theoretically demonstrate that a strong enhancement of the Magnetocaloric Effect is achieved in geometrically frustrated cluster spin-glass systems just above the freezing temperature. We consider a network of clusters interacting randomly which havetriangular structure composed of Ising spins interacting antiferromagnetically. The intercluster disorder problem is treated using a cluster spin glass mean-field theory, which allows exact solution of the disordered problem. The intracluster part can be solved using exact enumeration. The coupling between the inter and intracluster problem incorporates the interplay between effects coming from geometric frustration and disorder. As a result, it is shown that there is the onset of cluster spin glass phase even with very weak disorder.Remarkably, it is exactly within a range of very weak disorder and small magnetic field that is observed the strongest isothermal release of entropy. 

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“…Recently, there has been a substantial surge in exploring lowdimensional magnetic materials owing to the realization of novel magnetic states such as quantum spin liquids [1], spinglasses [2,3], and quantum paramagnets [4]. Notably, the study of spin-glass compounds enabled researchers to understand low-temperature spin dynamics, magnetic memory, and relaxation effects.…”

Section: Introductionmentioning

confidence: 99%

Spin-glass behavior in Li₃NiCuBiO₆: a two-dimensional distorted honeycomb-lattice

Kumar¹,

Sundaresan²

2022

J. Phys.: Condens. Matter

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We report a detailed experimental study on the structural and magnetic properties of Li3NiCuBiO6 by means of various characterization techniques. It crystallizes into a monoclinic crystal structure composed of a layered magnetic honeycomb lattice along the c-axis. The existence of a glassy state below 4 K is indicated by dc and ac susceptibility measurements. Magnetic contribution to the total heat capacity also peaks around the freezing temperature, and its linear temperature dependence backs our claim of a glassy state in the compound. The calculated magnetic entropy unveil that only ∼ 26 % of the total entropy is released for the system (S = 3/2) and a tremendous amount of spin entropy is retained in the system. Further, analysis of the frequency-dependent freezing temperature with the help of power law confirms the presence of a spin glass state. Moreover, the appearance of magnetic memory and relaxation effect below freezing temperature manifest the development of the system via a large number of intermediate metastable states. All these measurements confirm the spin-glass behavior of the compound. We consider the presence of different magnetic atoms in honeycomb lattice as the main driving factor for the spin-glass ground state.

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Cluster-glass behavior in the two-dimensional triangular lattice Ising-spin compound Li2Mn3O7

Cited by 18 publications

References 57 publications

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Enhancement of the magnetocaloric effect in geometrically frustrated cluster spin glass systems

Spin-glass behavior in Li₃NiCuBiO₆: a two-dimensional distorted honeycomb-lattice

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Cluster-glass behavior in the two-dimensional triangular lattice Ising-spin compound Li2Mn3O7

Cited by 18 publications

References 57 publications

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Existence of complex magnetic ground state and topological Hall effect in centrosymmetric silicide DyScSi

Enhancement of the magnetocaloric effect in geometrically frustrated cluster spin glass systems

Spin-glass behavior in Li3NiCuBiO6: a two-dimensional distorted honeycomb-lattice

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Spin-glass behavior in Li₃NiCuBiO₆: a two-dimensional distorted honeycomb-lattice