Magnetic structure of 
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 determined by powder neutron diffraction

Guo, Hanjie; Ritter, C.; Komarek, A. C.

doi:10.1103/physrevb.96.144415

Cited by 24 publications

(37 citation statements)

References 27 publications

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“…2(b)]. We conclude, therefore, that the Ir sublattice in Lu 2 Ir 2 O 7 and Yb 2 Ir 2 O 7 orders in the same AIAO structure as found in other A 2 Ir 2 O 7 iridates [26][27][28][29][30][31][32][33] .…”

supporting

confidence: 63%

“…25 In the A 2 Ir 2 O 7 compounds studied so far, the ordered magnetic moments on the Ir sites are small (∼ 0.5 µ B ) and point either all towards the center of the tetrahedron or directly away from it -the socalled all-in-all-out (AIAO) structure, see Fig. 1(a) [26][27][28][29][30][31][32][33] .…”

mentioning

confidence: 99%

“…The magnetic moments on the Yb/Lu and Ir sites form a basis for a representation of the space group F d3m with propagation vector k = 0 which decomposes as 31,40 suffix which indicates the dimension of the irrep. Only the AIAO structure (Γ 3 ) is consistent with our data for Lu 2 Ir 2 O 7 at 1.5 K. The fit to this magnetic structure is shown in Fig.…”

mentioning

confidence: 99%

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Strong quantum fluctuations from competition between magnetic phases in a pyrochlore iridate

et al. 2020

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We report neutron diffraction measurements of the magnetic structures in two pyrochlore iridates, Yb2Ir2O7 and Lu2Ir2O7. Both samples exhibit the all-in-all-out magnetic structure on the Ir 4+ sites below TN 150 K, with a low temperature moment of around 0.45 µB/Ir. Below 2 K, the Yb moments in Yb2Ir2O7 begin to order ferromagnetically. However, even at 40 mK the ordered moment is only 0.57(3) µB/Yb, significantly smaller than the saturated moment of 2 µB/Yb deduced from magnetization measurements and from a refined model of the crystal field environment. The reduced moment on Yb is found to be a consequence of enhanced phase competition caused by the coupling to the all-in-all-out magnetic order on the Ir sublattice. arXiv:1909.07819v2 [cond-mat.str-el]

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supporting

confidence: 63%

mentioning

confidence: 99%

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Strong quantum fluctuations from competition between magnetic phases in a pyrochlore iridate

et al. 2020

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“…It is interesting to compare this result with NPD data of Ref. [22], where below 10 K an additional (111) reflection appears, which should be absent in a pure realisation of AIAO magnetic order. The authors argued that at this temperature the magnetic structure slightly deviates from AIAO order, and acquires an additional XY component.…”

Section: Magnetic Structuresupporting

confidence: 53%

“…For nominally stoichiometric powder samples of Tb 2 Ir 2 O 7 , published magnetisation data suggest that the Ir site orders at ∼ 130 K [20,31], while resistivity data show insulating behaviour at all temperatures, with a small anomaly at the magnetic transition [31]. The magnetic structure of Tb 2 Ir 2 O 7 has been studied by neutron powder diffraction [20,22]. While lacking the element specificity of the REXS technique, the NPD experiments indicate that both the Tb and Ir sublattices exhibit AIAO order below a Néel temperature of ∼ 125-130 K. One notable feature of the NPD experiments is that the onset of order on the Tb sublattice is more gradual than that of the Ir one, suggesting that the former is induced by spontaneous order on the latter, through significant d-f interactions.…”

Section: Experimental Methodsmentioning

confidence: 99%

Selective probing of magnetic order on Tb and Ir sites in stuffed Tb₂Ir₂O₇ using resonant x-ray scattering

Donnerer

Rahn

Schierle

et al. 2019

J. Phys.: Condens. Matter

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We study the magnetic structure of the "stuffed" (Tb-rich) pyrochlore iridate Tb2+xIr2−xO7−y, using resonant elastic x-ray scattering (REXS). In order to disentangle contributions from Tb and Ir magnetic sublattices, experiments were performed at the Ir L3 and Tb M5 edges, which provide selective sensitivity to Ir 5d and Tb 4f magnetic moments, respectively. At the Ir L3 edge, we found the onset of long-range k = 0 magnetic order below T Ir N ∼ 71 K, consistent with the expected signal of all-in all-out (AIAO) magnetic order. Using a single-ion model to calculate REXS crosssections, we estimate an ordered magnetic moment of µ Ir 5d ≈ 0.34(3) µB at 5 K. At the Tb M5 edge, long-range k = 0 magnetic order appeared below ∼ 40 K, also consistent with an AIAO magnetic structure on the Tb site. Additional insight into the magnetism of the Tb sublattice is gleaned from measurements at the M5 edge in applied magnetic fields up to 6 T, which is found to completely suppress the Tb AIAO magnetic order. In zero applied field, the observed gradual onset of the Tb sublattice magnetisation with temperature suggests that it is induced by the magnetic order on the Ir site. The persistence of AIAO magnetic order, despite the greatly reduced ordering temperature and moment size compared to stoichiometric Tb2Ir2O7, for which T Ir N = 130 K and µ Ir 5d = 0.56 µB, indicates that stuffing could be a viable means of tuning the strength of electronic correlations, thereby potentially offering a new strategy to achieve topologically non-trivial band crossings in pyrochlore iridates.

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Conductive properties of heavy-rare-earth A2Ir2O7 iridates synthesized by the CsCl-flux method

Staško

Vlášková

Proschek

et al. 2023

Journal of Physics and Chemistry of Solids

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Magnetic structure of Tb2Ir2O7 determined by powder neutron diffraction

Cited by 24 publications

References 27 publications

Strong quantum fluctuations from competition between magnetic phases in a pyrochlore iridate

Strong quantum fluctuations from competition between magnetic phases in a pyrochlore iridate

Selective probing of magnetic order on Tb and Ir sites in stuffed Tb₂Ir₂O₇ using resonant x-ray scattering

Conductive properties of heavy-rare-earth A2Ir2O7 iridates synthesized by the CsCl-flux method

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Magnetic structure of Tb2Ir2O7 determined by powder neutron diffraction

Cited by 24 publications

References 27 publications

Strong quantum fluctuations from competition between magnetic phases in a pyrochlore iridate

Strong quantum fluctuations from competition between magnetic phases in a pyrochlore iridate

Selective probing of magnetic order on Tb and Ir sites in stuffed Tb2Ir2O7 using resonant x-ray scattering

Conductive properties of heavy-rare-earth A2Ir2O7 iridates synthesized by the CsCl-flux method

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Selective probing of magnetic order on Tb and Ir sites in stuffed Tb₂Ir₂O₇ using resonant x-ray scattering