Effects of the nearest-neighbor environment of copper atoms on the XANES spectra of layered chromium-copper disulfides

Коротаев, Е. В.; Syrokvashin, Mikhail M.; Peregudova, N. N.; Kanazhevskii, V. V.; Mazalov, L. N.; Соколов, В. В.

doi:10.1134/s0022476615030294

Cited by 4 publications

(2 citation statements)

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“…The measured DSC signals exhibit a single peak at ~694–695 K. Thus, the position of the inflection feature on μ eff (T) dependencies and peak on the DSC curves are correlated well. At room temperature, copper atoms are localized at the “ordered” tetrahedral sites between CrS 2 -layers, whereas the “disordered” octahedral sites remain unoccupied [ 10 , 26 , 33 , 34 ]. With the temperature increase, the occupation probability of octahedral sites increases.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Properties of Novel Layered Disulfides CuCr0.99Ln0.01S2 (Ln = La…Lu)

et al. 2021

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The comprehensive study of the lanthanide-doped solid solutions CuCr0.99Ln0.01S2 (Ln = La…Lu) magnetic properties was carried out using static magnetochemistry and differential scanning calorimetry techniques. It was shown that magnetic properties of CuCr0.99Ln0.01S2 are significantly affected by the magnetic properties of the lanthanide ion. The magnetic susceptibility and the effective magnetic moment were found to deviate from the Curie-Weiss law in the temperature 90 K below and 50 K above the order-disorder transition at 695 K. The observed behavior of the temperature dependence of the effective magnetic moment in the order-disorder transition temperature region was described as a result of copper atoms redistribution over different types of the crystallographic sites.

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Section: Resultsmentioning

confidence: 99%

Magnetic Properties of Novel Layered Disulfides CuCr0.99Ln0.01S2 (Ln = La…Lu)

et al. 2021

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“…Different crystallographic sites between the CrS 2 layers (the van der Waals gap region) are tetrahedral and octahedral o -sites. In the ordered state at room temperature, the copper atoms are localized at the tetrahedral sites [ 9 , 27 , 34 , 35 ]. The probability of the localization of o -sites increases in the ODT temperature region.…”

Section: Resultsmentioning

confidence: 99%

Effect of the Order-Disorder Transition on the Electronic Structure and Physical Properties of Layered CuCrS2

et al. 2021

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The work reports a comprehensive study of the Seebeck coefficient, electrical resistivity and heat capacity of CuCrS2 in a wide temperature range of 100–740 K. It was shown that the value of the Seebeck coefficient is significantly affected by the sample treatment procedure. The order-to-disorder (ODT) phase transition was found to cause a metal-insulator transition (MIT). It was established that the ODT diminishes the Seebeck coefficient at high temperatures (T > 700 K). The DFT calculations of the CuCrS2 electronic structure showed that the localization of copper atoms in octahedral sites makes the band gap vanish due to the MIT. The decrease of CuCrS2 electrical resistivity in the ODT temperature region corresponds to the MIT.

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