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Martı́nez, B.; Sandiumenge, F.; Rouco, A.J.; Labarta, A.; Rodrı́guez-Carvajal, J.; Tovar, M.; Causa, M.T.; Galí, Salvador; Obradors, X.

doi:10.1103/physrevb.46.10786

Cited by 90 publications

(57 citation statements)

References 23 publications

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“…The disorder in this compound stems from the dilution of the Cr sublattice by nonmagnetic Ga 3+ ions. The magnetic susceptibility measurements (macroscopic, χ macro , in contrast to local measurements by NMR technique [10]) suggest the occurrence of spin glass state with spin freezing temperature T g ≈ 2-5 K [11][12][13][14][15]. All other experimental data confirms existence of a spin-liquid-like ground state [12,16,17].…”

Section: Kagome Antiferromagnet Srgasupporting

confidence: 57%

Effect of Chemical Disorder on Geometrically Frustrated Kagome Lattice

Szymczak

Баран

et al. 2008

Acta Phys. Pol. A

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This paper reviews recent progress in the studies of magnetic dilutions on magnetic properties of two frustrated systems: magnetoplumbite-like SrGa 12−x Cr x O 19 and kagome staircase Co 3 V 2 O 8 doped with Mg ions. In the first group of compounds magnetic properties are determined by magnetic defects arising due to doping. In the case of kagome staircase compounds magnetic dilution suppresses effects of crystal field acting on magnetic ions. In particular, the dilution decreases magnetocrystalline anisotropy and anisotropy of magnetization.

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Section: Kagome Antiferromagnet Srgasupporting

confidence: 57%

Effect of Chemical Disorder on Geometrically Frustrated Kagome Lattice

Szymczak

Баран

et al. 2008

Acta Phys. Pol. A

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“…While not possessing the level of disorder traditionally associated with spin glasses, SCGO displays a spin glass transition at low temperatures ͑T f ϳ 5 KӶ⌰ Weiss ϳ 500 K͒, which is associated with the geometrical frustration inherent to the kagomé lattice. Dilution is expected to have a significant impact on such a strongly frustrated system, and indeed T f in SCGO is strongly reduced by dilution, 27,28 decreasing by ϳ32% for x =2 (ϳ25% dilution).…”

Section: Introductionmentioning

confidence: 99%

Quantum and thermal spin relaxation in the diluted spin iceDy2−xMxTi2O7
Snyder
¹
,
Ueland
²
,
Mizel
³

et al. 2004
Phys. Rev. B
73
11
59
2
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We have studied the low-temperature ac magnetic susceptibility of the diluted spin ice compound Dy 2−x M x Ti 2 O 7 , where the magnetic Dy ions on the frustrated pyrochlore lattice have been replaced with nonmagnetic ions, M = Y or Lu. We examine a broad range of dilutions, 0 ഛ x ഛ 1.98, and we find that the T ϳ 16 K freezing is suppressed for low levels of dilution but re-emerges for x Ͼ 0.4 and persists to x = 1.98. This behavior can be understood as a nonmonotonic dependence of the quantum spin relaxation time with dilution. The results suggest that the observed spin freezing is fundamentally a single spin process that is affected by the local environment, rather than the development of spin-spin correlations as earlier data suggested.

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“…One of the best-studied systems in this class is the layered compound SrCr 8 Ga 4 O 19 (SCGO). [2][3][4][5][6][7][8][9][10] Attention has focussed on the fact that the majority of its magnetic Cr 3+ -ions reside on the sites kagome lattices, although the full structure is more complex. Following the interest in kagome magnets generated by studies of SCGO, a great deal of attention has been devoted to the oxide and fluoride pyrochlore magnets, in which the magnetic ions form a lattice of corner-sharing tetrahedra as depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

Low-temperature properties of classical geometrically frustrated antiferromagnets

1998

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We study the ground-state and low-energy properties of classical vector spin models with nearestneighbour antiferromagnetic interactions on a class of geometrically frustrated lattices which includes the kagome and pyrochlore lattices. We explore the behaviour of these magnets that results from their large ground-state degeneracies, emphasising universal features and systematic differences between individual models. We investigate the circumstances under which thermal fluctuations select a particular subset of the ground states, and find that this happens only for the models with the smallest ground-state degeneracies. For the pyrochlore magnets, we give an explicit construction of all ground states, and show that they are not separated by internal energy barriers. We study the precessional spin dynamics of the Heisenberg pyrochlore antiferromagnet. There is no freezing transition or selection of preferred states. Instead, the relaxation time at low temperature, T , is of orderh/kBT . We argue that this behaviour can also be expected in some other systems, including the Heisenberg model for the compound SrCr8Ga4O19.

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Magnetic dilution in the strongly frustratedkagomeantiferromagnetSrGa12−x
B. Martı́nez
¹
,
F. Sandiumenge
²
,
A.J. Rouco
³

et al.

Cited by 90 publications

References 23 publications

Effect of Chemical Disorder on Geometrically Frustrated Kagome Lattice

Effect of Chemical Disorder on Geometrically Frustrated Kagome Lattice

Quantum and thermal spin relaxation in the diluted spin iceDy2−xMxTi2O7
Snyder
¹
,
Ueland
²
,
Mizel
³

et al. 2004
Phys. Rev. B
73
11
59
2
View full text Add to dashboard Cite

Low-temperature properties of classical geometrically frustrated antiferromagnets

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Magnetic dilution in the strongly frustratedkagomeantiferromagnetSrGa12−xB. Martı́nez1, F. Sandiumenge2, A.J. Rouco3 et al.

Cited by 90 publications

References 23 publications

Effect of Chemical Disorder on Geometrically Frustrated Kagome Lattice

Effect of Chemical Disorder on Geometrically Frustrated Kagome Lattice

Quantum and thermal spin relaxation in the diluted spin iceDy2−xMxTi2O7Snyder1, Ueland2, Mizel3 et al. 2004Phys. Rev. B7311592View full textAdd to dashboardCite

Low-temperature properties of classical geometrically frustrated antiferromagnets

Contact Info

Product

Resources

About

Magnetic dilution in the strongly frustratedkagomeantiferromagnetSrGa12−x
B. Martı́nez
¹
,
F. Sandiumenge
²
,
A.J. Rouco
³

et al.

Quantum and thermal spin relaxation in the diluted spin iceDy2−xMxTi2O7
Snyder
¹
,
Ueland
²
,
Mizel
³

et al. 2004
Phys. Rev. B
73
11
59
2
View full text Add to dashboard Cite