Field-Induced Transitions in Highly Frustrated SrHo2O4

Young, Olga; Manuel, Pascal; Khalyavin, D. D.; Wildes, A.; Petrenko, O. A.

doi:10.3390/cryst9100488

Cited by 10 publications

(14 citation statements)

References 20 publications

(40 reference statements)

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“…The most interesting results for SrDy 2 O 4 have been found in an applied magnetic field, where the long-range order is stabilised out of a short-ranged zero-field state [2,[9][10][11]. A somewhat similar field-induced magnetisation process (and perhaps the one closest to SrEr 2 O 4 in character) has recently been reported for SrHo 2 O 4 [12], although the local environments are significantly different for the RE magnetic ions in these two compounds.…”

Section: Introductionmentioning

confidence: 55%

Field-induced magnetic states in geometrically frustrated SrEr2O4

et al. 2021

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We report an unusual in-field behaviour of SrEr_22O_44 for a magnetic field applied along two high-symmetry directions, the a and c axes. This geometrically frustrated magnet hosts two crystallographically inequivalent Er ions, Er1 and Er2, that are both located on triangular zigzag ladders, but only one site, Er1, forms a long-range magnetic order at low temperatures in a zero field. We follow the sequence of peculiar field induced states in SrEr_22O_44 with detailed single-crystal magnetisation and neutron diffraction experiments. On application of an external field along the cc axis, the long-range antiferromagnetic order of the Er1 ions is rapidly destroyed and replaced, in fields between 2 and 5 kOe, by a state with shorter-range correlations. The change in correlation length coincides with a fast increase in magnetisation during the metamagnetic transition above which a long-range order is reestablished and maintained into the high fields. The high-field ferromagnet-like order is characterised by significantly different magnetic moments on the two Er sites, with the Er1 site dominating the magnetisation process. For the field applied parallel to the a axis, in the field range of 4 to 12 kOe, the planes of diffuse magnetic scattering observed in zero field due to the one-dimensional correlations between the Er2 moments are replaced by much more localised but still diffuse features corresponding to the establishment of an up-up-down structure associated with a one-third magnetisation plateau. Above 14 kOe, a ferromagnet-like high-field order is induced following another phase transition. For this direction of the field, the Er2 moments dictate the succession of transitions while the Er1 moments remain significantly less polarised. A complete field polarisation of both Er sites is not achieved even at 50~kOe for either field direction, reflecting the strongly anisotropic nature of magnetisation process in SrEr_22O_44.

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Section: Introductionmentioning

confidence: 55%

Field-induced magnetic states in geometrically frustrated SrEr2O4

et al. 2021

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“…and cannot be interpreted by the conventional two-sublattice model with uniaxial anisotropy. As for the neutron scattering of SrHo 2 O 4 , the field-evolution of the diffraction patterns in two orthogonal scattering planes, (hk0) and (h0l), are observed [5]. In both geometries, the main effect of an applied field is seen in the evolution of the diffuse scattering.…”

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confidence: 89%

Magnetic Field-Induced Phase Transition

Matsuda

2020

Crystals

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“…What makes the BaDy 2 O 4 case unusual is the fact that the field-induced uud state in this compound seems to be completely different from the zero-field structure rather than evolving from it. In SrHo 2 O 4 , for example 30 , the main effect of a field applied along the b axis is in the evolution of the diffuse magnetic scattering to a set of nearly resolutionlimited Bragg peaks associated with the uud state. Similarly in SrEr 2 O 4 , a field applied parallel to the a axis drives the planes of diffuse scattering observed in zero field to much more localised, but still diffuse features, corresponding to the establishment of the uud structure and the associated one-third magnetisation plateau 31 .…”

Section: B Powder Neutron Diffractionmentioning

confidence: 99%

Fragile ground state and rigid field-induced structures in the zigzag ladder compound BaDy2O4

et al. 2021

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We report on a sequence of field-induced transitions in the zigzag ladder compound BaDy2O4 studied with powder neutron diffraction and magnetisation measurements. In agreement with the previously published results, the low temperature zero-field structure is characterised by two half-integer propagation vectors, k1 = [ 1 2 0 1 2 ] and k2 = [ 1 2 1 2 1 2 ]. However, on application of an external magnetic field, the Bragg peaks corresponding to the zero-field structure lose their intensity rather rapidly and disappear completely in a field of 2.5 kOe. In the intermediate fields, 2.5 to 22.5 kOe, new peaks are observed characterised by the propagation vector k = [0 0 1 3 ] corresponding to an up-up-down (uud) structure as well k = 0 ferromagnetic peaks. This regime of fields corresponds to a pronounced plateau in the magnetisation curve. Remarkably, the uud structure survives heating to at least 1.4 K, three times higher temperature than the TN of 0.48 K for the zero-field structure. Above 22.5 kOe, the k peaks disappear while the k = 0 peaks gain significant intensity indicating an increase in the polarisation of the system. The analysis of the intensities of the field-induced reflections allows for a clear identification of the magnetic structures in both the intermediate and high field regimes.

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Field-Induced Transitions in Highly Frustrated SrHo2O4

Cited by 10 publications

References 20 publications

Field-induced magnetic states in geometrically frustrated SrEr2O4

Field-induced magnetic states in geometrically frustrated SrEr2O4

Magnetic Field-Induced Phase Transition

Fragile ground state and rigid field-induced structures in the zigzag ladder compound BaDy2O4

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