Preparation and lattice parameters of the rare earth tetraborides

Fisk, Z.; Cooper, A. S.; Schmidt, P. H.; Castellano, R. N.

doi:10.1016/0025-5408(72)90205-x

Cited by 91 publications

(15 citation statements)

References 4 publications

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“…For the subsequent growths, no sign of impurities was observed. The lattice parameters were determined to be a = 7.05563(8) Å and c = 3.98605(5) Å by profile matching (GOF = 1.92) and are in agreement with previous measurements [23,47]. Composition analysis by EDAX of the crystal of TmB 4 shows that for the entire length of the crystal boule, the average atomic percentages of Tm and B were (23.3 ± 0.4)% and (76.7 ± 0.4)% respectively, in good agreement with the expected 1:4 ratio for Tm:B.…”

Section: Tmbsupporting

confidence: 86%

“…Profile matching (GOF = 2.36) was carried out and the lattice parameters were determined to be a = 7.08674(3) Å and c = 4.00825(2) Å. These agree with previously published results [23,37,44]. A few peaks that do not belong to the P4/mbm space group can be observed in the powder X-ray profile of HoB 4 , shown in Figure 8c; however, due to their extremely reduced intensities, the impurity phase could not be identified.…”

Section: Hobsupporting

confidence: 86%

“…Single crystals of the rare-earth tetraborides have been produced previously by a variety of methods. Crystals have been prepared by the flux method [23,24] using either Al or Mo as the flux; however, these crystals are not sufficiently large for investigations involving neutron scattering. Previous studies (see Ref.…”

Section: Introductionmentioning

confidence: 99%

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Single-Crystal Growth of Metallic Rare-Earth Tetraborides by the Floating-Zone Technique

et al. 2019

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The rare-earth tetraborides are exceptional in that the rare-earth ions are topologically equivalent to the frustrated Shastry-Sutherland lattice. In this paper, we report the growth of large single crystals of RB 4 (where R = Nd, Gd → Tm, and Y) by the floating-zone method, using a high-power xenon arc-lamp furnace. The crystal boules have been characterized and tested for their quality using X-ray diffraction techniques and temperature- and field-dependent magnetization and AC resistivity measurements.

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Section: Tmbsupporting

confidence: 86%

Section: Hobsupporting

confidence: 86%

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Single-Crystal Growth of Metallic Rare-Earth Tetraborides by the Floating-Zone Technique

et al. 2019

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“…These calculations were carried out using Perdew-Burke-Ernzerhof Generalized Gradient Approximation (PBE-GGA) 26 exchange-correlation functional within the full potential linearized augmented plane wave (FP-LAPW) method as implemented in WIEN2k 27 . Crystal structure was obtained from experiment 28 . Calculations were performed with 168 k points in the irreducible wedge of the Brillouin zone (BZ).…”

Section: Methodsmentioning

confidence: 99%

Electronic structure of metallic tetra-boride $\textrm{TmB}_{\textrm{4}}$: An LDA+DMFT study

Pakhira,

Krishna,

Nandy

et al. 2018

Preprint

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Recent experimental observations of magnetization plateau in metallic tetraboride TmB4 have created a lot of interest in these class of materials. Hysteretic longitudinal resistance and anomalous Hall Effect are other remarkable features in the rare-earth tetraborides which represent experimental realizations of Archimedean Shastry-Sutherland (SSL) lattice. Electronic band structures, calculated under GGA and GGA+SO approximations, show that TmB4 is a narrow band system with considerable correlation in its f-level. Strong correlation effects in this system are studied under single-site dynamical mean field theory (DMFT) [LDA+DMFT scheme] using multi-orbital generalization of iterated perturbation theory (MO-IPT). Pseudo-gap behaviour in spectral function and non-Fermi liquid behaviour of self-energy shows non-trivial strong correlation effects present in this geometrically frustrated metallic magnets. We also consider the extant, heather-to-neglected, strong atomic spin-orbit coupling (SOC) effects. While there is a significant change in the topology of the Fermi surface in the presence of SOC, the non-Fermi liquid behavior survives. The system can be modelled by an effective two orbital spinless Falicov-Kimball model together with two free band like states.

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“…To differentiate them, we proceeded as suggested by Creyghton et al [37] and used the quadrupolar parameters. In fact, these authors stated that due to their similar crystal structures and the small c/a ratio [38,39] differences between NdB 4 (0.568 [40]) and LaB 4 (0.571 [41]), the quadrupolar parameters must follow the same sequence. In our case, the c/a ratio of UB 4 (0.5624 [42]) is close enough to that of YB 4 (0.5654 [43]) to apply the same principle.…”

Section: Nuclear Magnetic Resonancementioning

confidence: 99%

Insight into the Crystal Structures and Physical Properties of the Uranium Borides UB1.78±0.02, UB3.61±0.041 and UB11.19±0.13

et al. 2021

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In this study we reported the synthesis of three polycrystalline uranium borides UB1.78±0.02, UB3.61±0.041, and UB11.19±0.13 and their analyses using chemical analysis, X-ray diffraction, SQUID magnetometry, solid-state NMR, and Fourier transformed infrared spectroscopy. We discuss the effects of stoichiometry deviations on the lattice parameters and magnetic properties. We also provide their static and MAS-NMR spectra showing the effects of the 5f-electrons on the 11B shifts. Finally, the FTIR measurements showed the presence of a local disorder.

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Preparation and lattice parameters of the rare earth tetraborides

Cited by 91 publications

References 4 publications

Single-Crystal Growth of Metallic Rare-Earth Tetraborides by the Floating-Zone Technique

Single-Crystal Growth of Metallic Rare-Earth Tetraborides by the Floating-Zone Technique

Electronic structure of metallic tetra-boride $\textrm{TmB}_{\textrm{4}}$: An LDA+DMFT study

Insight into the Crystal Structures and Physical Properties of the Uranium Borides UB1.78±0.02, UB3.61±0.041 and UB11.19±0.13

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