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  1. No Access

    Article

    Evolution of the Structure and Magnetic Properties of the High-Tc Superconductor YBa2Cu3O6.92 in the Sol–Gel Synthesis Process

    We have studied the effect of sol–gel synthesis conditions on the structural and magnetic properties of the high-Tc superconductor YBa2Cu3Oy (y = 6.92 ± 0.02). Two low-temperature (<800°C) synthesis procedures ha...

    N. G. Trusevich, A. A. Vishnev, K. S. Pigalskiy, L. G. Mamsurova… in Inorganic Materials (2022)

  2. No Access

    Article

    Formation of Fermi Arcs at T \( \ll \) Tc in the Vicinity of d-Wave Nodes of Structurally Inhomogeneous YBa2Cu3O6.92 HTSCs

    The influence of structural inhomogeneity on a superconducting gap near d-wave nodes is co-nsidered for optimally doped YBa2Cu3O6.92 HTSCs. To this aim, specific heat in the temperature range of T = 2‒10 K at mag...

    L. G. Mamsurova, N. G. Trusevich, L. I. Trakhtenberg in Physics of the Solid State (2021)

  3. No Access

    Article

    Comparative Study of the Physical Properties of Fine-Crystalline Mechanoactivated and Sol–Gel Samples of YBa2Cu3O6.92 High-Temperature Superconductors

    A technique based on the sol–gel technology is developed for the synthesis of fine-crystalline YBa2Cu3O6.92 (Tc = 91.5 K) high-temperature superconductors (HTSCs), including the step-by-step annealing of the samp...

    L. G. Mamsurova, N. G. Trusevich, A. A. Vishnev… in Russian Journal of Physical Chemistry B (2020)

  4. No Access

    Article

    Schottky Anomalies in the Low-Temperature Specific Heat of YBa2Cu3Oy HTSC

    The evolution of the Schottky anomalies in the temperature dependence of the specific heat (in the temperature range T = 2–10 K and the magnetic field range H = 0–9 T) of polycrystalline YBa2Cu3Oy HTSCs is studie...

    L. G. Mamsurova, N. G. Trusevich… in Journal of Experimental and Theoretical Ph… (2019)

  5. No Access

    Article

    Magnetodynamic Studies of Fine-Crystalline YBa2Cu3Oy High-Temperature Superconductor Samples Synthesized by the Sol–Gel Method

    Measurements of the complex magnetic susceptibility as a function of the temperature, alternating field amplitude, and the parallel applied constant field values for a series of YBa2Cu3Oy high-temperature superco...

    K. S. Pigalskiy, L. G. Mamsurova, A. A. Vishnev… in Russian Journal of Physical Chemistry B (2018)

  6. No Access

    Article

    Magnetization and Static Magnetic Susceptibility of Fine-Crystalline High-Temperature YBa2Cu3Oy Superconductors Synthesized by the Sol–Gel Method

    A comparative study of the magnetization and static magnetic susceptibility of high-temperature superconductors (HTSC) YBa2Cu3Oy synthesized by two variants of the sol–gel method with different average sizes of c...

    L. G. Mamsurova, N. G. Trusevich… in Russian Journal of Physical Chemistry B (2018)

  7. No Access

    Article

    Suppression of the superconducting gap near d-wave nodes caused by the structural disorder in fine-crystalline YBa2Cu3O y high-T c superconductors

    The low-temperature (2 K ≤ T ≤ 10 K) specific heat of the series of fine-crystalline samples of YBa2Cu3O y high-Tc superconductor optimally doped with oxygen and having differen...

    L. G. Mamsurova, N. G. Trusevich, S. Yu. Gavrilkin, A. A. Vishnev… in JETP Letters (2017)

  8. No Access

    Article

    Peculiarities in the low-temperature specific heat related to nanoscale structural inhomogeneity in fine-crystalline YBa2Cu3O6.93 high-T c superconductors

    A comparative study of the low-temperature specific heat for two types of YBa2Cu3O y high-T c superconductor samples is performed within the temp...

    L. G. Mamsurova, N. G. Trusevich, S. Yu. Gavrilkin, A. A. Vishnev… in JETP Letters (2017)

  9. No Access

    Article

    Paramagnetism of copper–oxygen chains in high-temperature YBa2Cu3O6 + δ superconductors

    Experimental evidence for the existence of chain paramagnetic Curie-type contributions to the temperature dependence of static magnetic susceptibility χ(T) in the normal (nonsuperconducting) state is obtained for...

    L. G. Mamsurova, N. G. Trusevich… in Bulletin of the Russian Academy of Science… (2016)

  10. No Access

    Article

    Magnetic susceptibility of fine crystalline high-temperature YBa2Cu3O6.93 superconductors. The role of nanoscale structural disordering

    Static magnetic susceptibility χ(T) in the normal state (T c ≤ T ≤ 400 K) and specific heat C(T) near temperature T c of the transition to the super...

    L. G. Mamsurova, N. G. Trusevich… in Bulletin of the Russian Academy of Science… (2016)

  11. No Access

    Article

    Enhancement of pseudogap anomalies induced by nanoscale structural inhomogeneity in YBa2Cu3O6.93 high-T c superconductor

    The magnetization M(H) in the superconducting state, dc magnetic susceptibility χ(T) in the normal state, and specific heat C(T) near the superconducting transition temperature T c

    L. G. Mamsurova, K. S. Pigalskiy, N. G. Trusevich, A. A. Vishnev… in JETP Letters (2015)

  12. No Access

    Article

    Manifestation of pseudogap features in structurally inhomogeneous optimally doped HTSC YBa2Cu3O6.92

    Magnetization M(H,T) in magnetic fields H up to 90 kOe and at temperatures 2 K ≤ T < T c (where Tc is the superconducting transition temperature), along with magnetic susceptibilit...

    L. G. Mamsurova, S. Yu. Gavrilkin… in Bulletin of the Russian Academy of Science… (2015)

  13. No Access

    Article

    Comparative study of structure disordering effects in fine-crystalline HTSC YBa2Cu3O6.9 samples obtained by different methods

    A comparative study of the structure-sensitive magnetic properties of fine-crystalline YBa2Cu3O y samples obtained by different methods (the sol-gel technique and mechanical act...

    L. G. Mamsurova, A. A. Vishnev… in Bulletin of the Russian Academy of Science… (2014)

  14. No Access

    Article

    Evolution of atomic ordering in fine-grained YBa2Cu3O y high-temperature superconductors and its effect on superconducting transition temperature

    Regularities of changes in unit cell parameters and superconducting properties of the optimally doped fine-grained YBa2Cu3O y (y ≈ 6.92) high-temperature superconductors (HTSC) ...

    L. G. Mamsurova, K. S. Pigalskiy… in Bulletin of the Russian Academy of Science… (2013)

  15. No Access

    Article

    Disordering effects in the atomic structure of fine-crystalline HTSC YBa2Cu3O y

    The atomic structure of YBa2Cu3O y fine-crystalline HTSC samples with various average crystallite sizes 〈D〉 ranging from 0.4 to 2 μm and an oxygen concentration y close to the o...

    A. M. Balagurov, L. G. Mamsurova… in Journal of Experimental and Theoretical Ph… (2012)

  16. No Access

    Article

    Oxygen defects relaxation in high-temperature YBa2Cu3O7 superconductors

    The temperature dependences of normal state static magnet susceptibility χ(T) for high-temperature YBa2Cu3O7 superconductors (T c ≤ T ≤ 400 K) measured for the same sample before and after 22 year...

    N. G. Trusevich, L. G. Mamsurova… in Bulletin of the Russian Academy of Science… (2012)

  17. No Access

    Article

    Suppression of hole do** in fine-grained HTSC YBa2Cu3O y due to structural disordering

    It was proven experimentally that the structural disordering inherent to fine-grained high-temper- ature YBa2Cu3O y superconductors (with an average grain size of 〈D〉 < 2 μm) le...

    L. G. Mamsurova, N. G. Trusevich… in Bulletin of the Russian Academy of Science… (2011)

  18. No Access

    Article

    Features of the superconducting state and structural disorder in ultrafine particles of the HTSC YBa2Cu3O y

    We study the reasons for which the compound YBa2Cu3O y begins to lose its superconducting ability with a decrease in particle sizes to values of ∼0.1 μm. Our analysis of the res...

    L. G. Mamsurova, K. S. Pigalskiy… in Bulletin of the Russian Academy of Science… (2010)

  19. No Access

    Article

    The influence of interplane oxygen redistribution on the magnetization of fine-grained HTSC YBa2Cu3O y

    The magnetization of the fine-grained high-temperature superconductor (HTSC) YBa2Cu3O y is experimentally investigated at T < T c ...

    L. G. Mamsurova, N. G. Trusevich… in Bulletin of the Russian Academy of Science… (2009)

  20. No Access

    Article

    The oxygen content and its ordering in the chain planes in fine-grained HTSC YBa2Cu3O y

    A comparative analysis of the results of the X-ray and Mösbauer studies of the high-temperature superconductor (HTSC) YBa2Cu3O y and YBa2Cu3 − x ...

    L. G. Mamsurova, K. S. Pigalskiy… in Bulletin of the Russian Academy of Science… (2009)

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