Synthesis of α-NaFeO2-type LiYS2 by anion-exchange reaction

Kipp, D. O.; Vanderah, Terrell A.

doi:10.1016/0025-5408(90)90072-a

Cited by 12 publications

(5 citation statements)

References 8 publications

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“…The delafossite group of minerals serves as a perfect realization of the triangular magnetic lattice. The hexagonal delafossite structure (space group R3m) derives from the cubic rocksalt (NaCl) structure, if two different cations statistically distributed on the cation site undergo an order-disorder transition, segregating into alternate (111) planes to form a layered structure [491,492]. In the minerals delafossite, CuFeO 2 [493], and mcconnellite, CuCrO 2 [494], that share this crystal structure, the magnetic Fe 3+ (S = 5/2) and Cr 3+ (S = 3/2) ions form a perfect triangular lattice separated by nonmagnetic monovalent Cu + layers.…”

Section: Delafossite and Mcconnellite: Classical Spins On The Triangu...mentioning

confidence: 99%

Quantum magnetism in minerals

Inosov

2018

Advances in Physics

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The discovery of magnetism by the ancient Greeks was enabled by the natural occurrence of lodestone -a magnetized version of the mineral magnetite. Nowadays, natural minerals continue to inspire the search for novel magnetic materials with quantum-critical behaviour or exotic ground states such as spin liquids. The recent surge of interest in magnetic frustration and quantum magnetism was largely encouraged by crystalline structures of natural minerals realizing pyrochlore, kagome, or triangular arrangements of magnetic ions. As a result, names like azurite, jarosite, volborthite, and others, which were barely known beyond the mineralogical community a few decades ago, found their way into cutting-edge research in solid-state physics. In some cases, the structures of natural minerals are too complex to be synthesized artificially in a chemistry lab, especially in single-crystalline form, and there is a growing number of examples demonstrating the potential of natural specimens for experimental investigations in the field of quantum magnetism. On many other occasions, minerals may guide chemists in the synthesis of novel compounds with unusual magnetic properties. The present review attempts to embrace this quickly emerging interdisciplinary field that bridges mineralogy with low-temperature condensed-matter physics and quantum chemistry. PACS: 75.30.-m -intrinsic properties of magnetically ordered materials; 75.10.Jm -models of magnetic ordering, including quantum spin frustration; 91.60.Pn -magnetic properties of minerals.

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Section: Delafossite and Mcconnellite: Classical Spins On The Triangu...mentioning

confidence: 99%

Quantum magnetism in minerals

Inosov

2018

Advances in Physics

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“…The NaYS 2(1– x ) Te 2 x alloys (with x = 0, 0.33, 0.67, and 1) have trigonal-type structures with the space group number 166 ( R 3̅ m ) . The NaYS 2 compound was synthesized for the first time in 1964 by Ballestracci and Bertaut followed by several experimental studies. ,− On the other hand, the NaYTe 2 compound was studied theoretically by Shi et al To the best of our knowledge, however, there are no experimental or theoretical studies on the Te-doped NaYS 2 system. In the present study, the electronic structures and properties of NaYS 1.33 Te 0.67 and NaYS 0.67 Te 1.33 alloys are investigated since, with the exception of their crystal structures and some basic electronic properties, most of the essential physical properties of NaYS 2(1– x ) Te 2 x alloys remain unknown.…”

Section: Introductionmentioning

confidence: 99%

Tellurium Doping and the Structural, Electronic, and Optical Properties of NaYS_2(1–x)Te_2xAlloys

et al. 2019

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New ternary and quaternary NaYS 2(1– x ) Te 2 x alloys (with x = 0, 0.33, 0.67, and 1) are proposed as promising candidates for photon energy conversion in photovoltaic applications. The effects of Te doping on crystal, spectral, and optical properties are studied within the framework of periodic density functional theory. Increasing Te content decreases the band gap ( E g ) considerably (from 3.96 ( x = 0) to 1.62 eV ( x = 0.67)) and fits a quadratic model ( E g ( x ) = 3.96–6.78 x + 4.70 x 2 , ( r 2 = 0.96, n = 4)). The band gap of 1.62 eV makes the NaYS 0.67 Te 1.33 alloy ideal for photovoltaic applications for their ability to absorb in the visible segment of the sunlight spectrum. The calculated exciton binding energies are 9.78 meV for NaYS 1.33 Te 0.67 and 6.06 meV for NaYS 0.67 Te 1.33 . These values of the order of the thermal energy at room temperature suggest an easily dissociable hole–electron pair. The family of NaYS 2(1– x ) Te 2 x alloys are, therefore, promising candidates for visible photocatalytic devices and worthy of further experimental and theoretical investigations.

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“…Na, K, Rb, Cs), R is a rare-earth ion (in our case, Ce or Yb), and X is a chalcogen atom (O, S, or Se). They crystallize in the layered delafossite structure depicted in figure 1 that derives from the rock-salt structure upon cation ordering, realizing ABAB-type stacking of magnetic triangular-lattice layers [43,44]. Low-temperature thermodynamic measurements reveal no signatures of magnetic ordering down to subkelvin temperatures in NaYbO 2 [39,[45][46][47][48], NaYbS 2 [39,40,49], and NaYbSe 2 [39,[50][51][52], indicating that these Yb-delafossite compounds may possess QSL ground states.…”

Section: Introductionmentioning

confidence: 99%

Stripe-yz magnetic order in the triangular-lattice antiferromagnet KCeS₂

Kulbakov

Avdoshenko

Puente‐Orench

et al. 2021

J. Phys.: Condens. Matter

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Yb- and Ce-based delafossites were recently identified as effective spin-1/2 antiferromagnets on the triangular lattice. Several Yb-based systems, such as NaYbO2, NaYbS2, and NaYbSe2, exhibit no long-range order down to the lowest measured temperatures and therefore serve as putative candidates for the realization of a quantum spin liquid. However, their isostructural Ce-based counterpart KCeS2 exhibits magnetic order below T N = 400 mK, which was so far identified only in thermodynamic measurements. Here we reveal the magnetic structure of this long-range ordered phase using magnetic neutron diffraction. We show that it represents the so-called ‘stripe-yz’ type of antiferromagnetic order with spins lying approximately in the triangular-lattice planes orthogonal to the nearest-neighbor Ce–Ce bonds. No structural lattice distortions are revealed below T N, indicating that the triangular lattice of Ce3+ ions remains geometrically perfect down to the lowest temperatures. We propose an effective Hamiltonian for KCeS2, based on a fit to the results of ab initio calculations, and demonstrate that its magnetic ground state matches the experimental spin structure.

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Synthesis of α-NaFeO2-type LiYS2 by anion-exchange reaction

Cited by 12 publications

References 8 publications

Quantum magnetism in minerals

Quantum magnetism in minerals

Tellurium Doping and the Structural, Electronic, and Optical Properties of NaYS_2(1–x)Te_2xAlloys

Stripe-yz magnetic order in the triangular-lattice antiferromagnet KCeS₂

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Synthesis of α-NaFeO2-type LiYS2 by anion-exchange reaction

Cited by 12 publications

References 8 publications

Quantum magnetism in minerals

Quantum magnetism in minerals

Tellurium Doping and the Structural, Electronic, and Optical Properties of NaYS2(1–x)Te2xAlloys

Stripe-yz magnetic order in the triangular-lattice antiferromagnet KCeS2

Contact Info

Product

Resources

About

Tellurium Doping and the Structural, Electronic, and Optical Properties of NaYS_2(1–x)Te_2xAlloys

Stripe-yz magnetic order in the triangular-lattice antiferromagnet KCeS₂