Structure, magnetism, and transport of single-crystalline 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>R</mml:mi><mml:msub><mml:mi>NiSi</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow><mml:mspace width="4pt" /><mml:mo>(</mml:mo><mml:mi>R</mml:mi></mml:math>
 = Y, Gd-Tm, Lu)

Arantes, Fabiana R.; Aristizábal-Giraldo, Deisy; Masunaga, Sueli H.; Costa, Fanny N.; Ferreira, Fábio Furlan; Takabatake, Toshiro; Mendonça-Ferreira, L.; Ribeiro, R. A.; Ávila, M. A.

doi:10.1103/physrevmaterials.2.044402

Cited by 8 publications

(25 citation statements)

References 61 publications

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“…The superconducting properties of LuNiSi 3 are very similar to YNiSi 3 , but the superconductivity occurs at a higher critical temperature [T c = 1.61(2) K]. As the ionic radius of Lu 3+ is smaller than Y 3+ , LuNiSi 3 has a smaller unit-cell volume than YNiSi 3 , confirmed by previous x-ray analysis [35]. This increase in T c may be a consequence of a chemical pressure effect from the reduced volume, making these compounds good candidates for subsequent low-temperature pressure studies.…”

Section: B Lunisisupporting

confidence: 61%

“…Previous work on the series RNiSi 3 [35] showed, by PXRD analysis, that these compounds crystallize in the orthorhombic space group Cmmm. The experimental lattice constants are given in Table I of the Supplemental Material [38].…”

Section: Resultsmentioning

confidence: 96%

“…At zero field, there is a sharp transition at 1.42(2) K with ρ(T ) quickly reaching zero even with a highest available data point density. The residual resistivity before the superconducting transition is ρ 0 = 0.33(3) μ cm, obtained by averaging the values estimated in both directions, and the residual resistivity ratio (RRR), already published [35], is 54 (5). With increasing magnetic field, there is very little broadening of the transition, however, for H higher than 20 mT, the transition is no longer complete.…”

Section: A Ynisimentioning

confidence: 84%

“…YNiSi 3 and LuNiSi 3 single crystals were synthesized via the Sn-flux method originally used to grow YbNiSi 3 [34]. A proportion of 1:1:3:45 (Y/Lu:Ni:Si:Sn) was used as detailed in previous work [35] wherein the crystalline structures were verified by powder x-ray diffraction (PXRD) analysis and wavelength dispersive electron-probe microanalysis (EPMA) of the single crystals, conducted in a JEOL JXA-8200 microanalyzer. The crystal compositions were determined by averaging over ten different points of a polished sample.…”

Section: Methodsmentioning

confidence: 99%

“…The techniques discussed above allow us to obtain the basic superconducting parameters for YNiSi 3 . The electrondensity n can be calculated considering the contribution of the three electrons from Y 3+ and the presence of four formula units per unit cell of the compound (Z = 4), yielding n = 12/V cell = 3.70 × 10 28 m −3 , where V cell = 324.49 Å 3 for YNiSi 3 [35]. Assuming a spherical Fermi surface, k F is given by k F = (3nπ 2 ) 1/3 which leads to an effective mass…”

Section: A Ynisimentioning

confidence: 99%

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Superconductivity in monocrystalline YNiSi3 and LuNiSi3

et al. 2019

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We report the discovery of bulk superconductivity in the ternary intermetallics YNiSi 3 and LuNiSi 3. High-quality single crystals were grown via the Sn-flux method and studied using magnetization, specific-heat, and resistivity measurements at low temperatures. The critical temperatures obtained from these different techniques are in very good agreement and yield T c = 1.36(3) K and T c = 1.61(2) K for YNiSi 3 and LuNiSi 3 , respectively. Magnetization measurements indicate that both compounds are among the rare cases where type-I superconductivity occurs in a ternary intermetallic, however, the jump in the specific heat at the transition is lower than the value expected from BCS theory (C el /γ n T c = 1.43) in both materials and is equal to 1.14(9) and 0.71(5) for the Y and Lu compounds, respectively. Resistivity measurements exhibit sharp transitions but with critical fields μ 0 H c (0) (≈0.05 T for YNiSi 3 and ≈0.08 T for LuNiSi 3) considerably higher than those obtained from the magnetization and specific heat (≈0.01 T). First-principles density functional theory calculated electronic structure shows that these compounds have highly anisotropic and complex Fermi surfaces with one electronic and two holelike branches. One hole branch and the electron branch have a large cylindrical topology connecting the first Brillouin-zone boundaries, the former being built up by the hybridization of Y(Lu) d, Ni d, and Si p states, and the latter being built up by Ni d and Si p states. The calculated phononic structures indicate that the coupling of the Y(Lu), Ni d, and Si p electrons in the low-lying optical phonon branches is responsible for the formation of Cooper pairs and the observed superconducting state. Therefore, these compounds can be classified as anisotropic three-dimensional metals with multiband superconducting ground states in the weak-coupling regime.

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Section: B Lunisisupporting

confidence: 61%

Section: Resultsmentioning

confidence: 96%

Section: A Ynisimentioning

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Section: A Ynisimentioning

confidence: 99%

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Superconductivity in monocrystalline YNiSi3 and LuNiSi3

et al. 2019

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Diversity in Crystal Structure and Physical Properties of RETX₃ (RE – Rare Earth, T – Transition Metal, X – Main Group Element) Intermetallics

Singh

Sarkar

Peter

2022

The Chemical Record

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Rare Earth (re) based intermetallics are a fascinating class of inorganic compounds due to the presence of highly localized f‐electrons. Among the ternary intermetallics, RETX3 (RE – Rare Earth, T – Transition metals, X – 13–15th elements of the main groups) is one of the most widely studied RE‐based intermetallic families in terms of diverse crystal structures as well as physical properties. This perspective presents a brief account of different structural variations observed in this family of compounds. We have also discussed structure‐property correlations in selected compounds in this series that show interesting physical properties such as spin‐glass behavior, superconductivity, heavy fermion behavior, Kondo behavior, etc. The origin of different physical properties of these compounds is also discussed in brief by correlating their crystal structures.

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Anomalous specific heat and magnetic properties of TmxDy1-xAl2 (0 ≤ x ≤ 1)

Pathak

Bonilla

Paudyal

et al. 2019

Journal of Alloys and Compounds

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We study crystal structure, phase transitions and magnetism of pseudo-binary TmxDy1-xAl2 (0 ≤ x ≤ 1) compounds using temperature dependent X-ray powder diffraction, specific heat and magnetization measurements, first principles, and model calculations. In low external magnetic fields, Dy-rich compounds undergo continuous, second-order phase transitions at the respective Curie temperatures, TC. In contrast, the Tm-rich compounds exhibit discontinuous, first-order anomalies in the magnetically ordered states. These sharp transitions correlate with a substantial energy difference between the room temperature cubic and ground state rhombohedral structures of TmAl2. A clear anomaly in the lattice parameter is observed at ∼30 K for x = 0.5, which nearly coincides with TC = 31.2 K. The effective quadrupolar moment of the lanthanides changes sign around x = 0.5, which leads to a nearly zero anisotropy constant and approximately spherical effective 4f charge densities, providing an explanation for the lack of structural distortions below TC for x = 0.5. The calculations confirm [001] as the easy magnetization axis in the ground state tetragonal structure of DyAl2, and reveal collapse of the orbital magnetic moment when the easy magnetization direction changes to [111]. Within the rhombohedral ground state of TmAl2 [111] is the easy magnetization direction.

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Structure, magnetism, and transport of single-crystalline RNiSi3(R = Y, Gd-Tm, Lu)

Cited by 8 publications

References 61 publications

Superconductivity in monocrystalline YNiSi3 and LuNiSi3

Superconductivity in monocrystalline YNiSi3 and LuNiSi3

Diversity in Crystal Structure and Physical Properties of RETX₃ (RE – Rare Earth, T – Transition Metal, X – Main Group Element) Intermetallics

Anomalous specific heat and magnetic properties of TmxDy1-xAl2 (0 ≤ x ≤ 1)

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Structure, magnetism, and transport of single-crystalline RNiSi3(R = Y, Gd-Tm, Lu)

Cited by 8 publications

References 61 publications

Superconductivity in monocrystalline YNiSi3 and LuNiSi3

Superconductivity in monocrystalline YNiSi3 and LuNiSi3

Diversity in Crystal Structure and Physical Properties of RETX3 (RE – Rare Earth, T – Transition Metal, X – Main Group Element) Intermetallics

Anomalous specific heat and magnetic properties of TmxDy1-xAl2 (0 ≤ x ≤ 1)

Contact Info

Product

Resources

About

Diversity in Crystal Structure and Physical Properties of RETX₃ (RE – Rare Earth, T – Transition Metal, X – Main Group Element) Intermetallics