排序方式: 共有22条查询结果,搜索用时 422 毫秒
1.
L. S. Vasil'ev F. E. Surzhikov O. G. Azarevich V. S. Bogdanov V. A. Dorokhov 《Russian Chemical Bulletin》1994,43(8):1431-1432
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1510–1511, August, 1994. 相似文献
2.
L. S. Vasil'ev O. G. Azarevich V. S. Bogdanov M. N. Bochkareva V. A. Dorokhov 《Russian Chemical Bulletin》1992,41(11):2104-2107
Boron chelates were obtained by the reaction of butoxy(butylthio)diphenylborane with 5,5,5-trifluoro(trichloro)-4-aminopent-3-en-2-one, and their reactions with primary amines were investigated. -Diiminate complexes of boron with trifluoro- and trichloromethyl groups were synthesized.N. D. Zelinskii Institute of Organic Chemistry, Russian Academy of Sciences, 117913 Moscow. Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 11, pp. 2657–2661, November, 1992. 相似文献
3.
4.
N. E. Sluchanko A. N. Azarevich A. V. Bogach V. V. Glushkov S. V. Demishev A. V. Levchenko V. B. Filippov N. Yu. Shitsevalova 《Journal of Experimental and Theoretical Physics》2013,116(5):866-871
The transverse magnetoresistance Δρ/ρ(H, T) of Tm1 ? x Yb x B12 single crystals is studied in the ytterbium concentration range corresponding to the antiferromagnet-paramagnet transition in a magnetic field up to 80 kOe at low temperatures. A magnetic H-T phase diagram is constructed for the antiferromagnetic state of substitutional Tm1 ? x Yb x B12 solid solutions with x ≤ 0.1. The contributions to the magnetoresistance in the antiferromagnetic and paramagnetic phases of the dodecaborides under study are separated. Along with negative quadratic magnetoresistance -Δρ/ρ ∝ H 2, the magnetically ordered phase of these compounds is found to have component Δρ/ρ ∝ H that linearly changes in a magnetic field. The negative contribution to the magnetoresistance of Tm1 ? x Yb x B12 is analyzed in terms of the Yosida model for a local magnetic susceptibility. 相似文献
5.
A. V. Bogach N. E. Sluchanko V. V. Glushkov S. V. Demishev A. N. Azarevich V. B. Filippov N. Yu. Shitsevalova A. V. Levchenko J. Vanacken V. V. Moshchalkov S. Gabani K. Flachbart 《Journal of Experimental and Theoretical Physics》2013,116(5):838-842
The magnetization of substitutional Tm1 ? x Yb x B12 solid solutions is studied in the composition range 0 < x ≤ 0.81. The measurements are performed at low temperatures (1.9–300 K) in steady (up to 11 T) and pulsed (up to 50 T, pulse duration of 20–100 ms) magnetic fields. An analysis of the experimental data allowed the contributions to the magnetization of the paramagnetic phase of the Tm1 ? x Yb x B12 compounds to be separated. These contributions include a Pauli component, which corresponds to the response of the heavy-fermion manybody states that appears in the energy gap in the vicinity of the Fermi level (density of states (3?4) × 1021 cm?3 meV?1), and a contribution with saturation in high magnetic fields attributed to the localized magnetic moments ((0.8–3.7)μB per unit cell) of the nanoclusters formed by rare-earth ions with an antiferromagnetic interaction. 相似文献
6.
N. E. Sluchanko A. N. Azarevich M. A. Anisimov A. V. Bogach S. Yu. Gavrilkin V. V. Glushkov S. V. Demishev A. A. Maksimov I. I. Tartakovskii E. V. Filatov V. B. Filippov A. B. Lyashchenko 《JETP Letters》2016,103(11):674-679
High-precision measurements of the Hall effect and Raman scattering have been performed for single crystals of ZrB12 superconductor in the wide temperature range of 5–300 K. For ZrB12, the boson peak with ωmax ~ 100 cm–1 has been observed for the first time within the low-frequency range of the Raman spectrum I(ω). The sizes of vibrational clusters with the correlation length ranging from 25 to 35 Å are estimated. The relation between the renormalization of the low-frequency density of vibrational states accompanying the transition to the cage-glass phase (T* ~ 90 K) and the enhancement of superconductivity in ZrB12 is discussed. 相似文献
7.
Anisimov M. A. Bogach A. V. Kuznetsov A. V. Azarevich A. N. Samarin N. A. Demishev S. V. Shitsevalova N. Yu. Dukhnenko A. V. Filipov V. B. Sluchanko N. E. Glushkov V. V. 《Physics of the Solid State》2019,61(4):565-570
Physics of the Solid State - The magnetic properties of substitutional solid solutions Eu0.9Yb0.1B6 have been investigated in the temperature range of 2–300 K in fields up to 5 T. The data... 相似文献
8.
Sluchanko N. E. Dudka A. P. Khrykina O. N. Bolotina N. B. Azarevich A. N. Bogach A. V. Gavrilkin S. Yu. Demishev S. V. Dukhnenko A. V. Shitsevalova N. Yu. Filipov V. B. Gabani S. Flachbart K. 《JETP Letters》2018,108(10):691-696
JETP Letters - The magnetic phase diagram of Tm1–xYbxB12 antiferromagnets is determined from the specific heat measurements performed at low and ultralow temperatures (0.07–10 K).... 相似文献
9.
N. E. Sluchanko A. N. Azarevich A. V. Bogach V. V. Glushkov S. V. Demishev M. A. Anisimov A. V. Levchenko V. B. Filipov N. Yu. Shitsevalova 《Journal of Experimental and Theoretical Physics》2012,115(3):509-526
The angular, temperature, and magnetic field dependences of the resistance recorded in the Hall effect geometry are studied for the rare-earth dodecaboride Tm1 ? x Yb x B12 solid solutions where the metal-insulator and antiferromagnetic-paramagnetic phase transitions are observed in the vicinity of the quantum critical point x c ?? 0.3. The measurements performed on high-quality single crystals in the temperature range 1.9?C300 K for the first time have revealed the appearance of the second harmonic contribution, a transverse even effect in these fcc compounds near the quantum critical point. This contribution a is found to increase drastically both under the Tm-to-ytterbium substitution in the range x > x c and with an increase in the external magnetic field. Moreover, as the Yb concentration x increases, a negative peak of a significant amplitude appears on the temperature dependences of the Hall coefficient R H(T) for the Tm1 ? x Yb x B12 compounds, in contrast to the invariable behavior R H(T) ?? const found for TmB12. The complicated activation-type behavior of the Hall coefficient is observed at intermediate temperatures for x ?? 0.5 with activation energies E g /k B ?? 200 K and E a/k B = 55?C75 K, and the sign inversion of R H(T) is detected at liquid-helium temperatures in the coherent regime. Renormalization effects in the electron density of states induced by variation of the Yb concentration are analyzed. The anomalies of the charge transport in Tm1 ? x Yb x B12 solid solutions in various regimes (charge gap formation, intra-gap many-body resonance, and coherent regime) are discussed in detail and the results are interpreted in terms of the electron phase separation effects in combination with the formation of nanosize clusters of rare earth ions in the cage-glass state of the studied dodecaborides. The data obtained allow concluding that the emergence of Yb-Yb dimers in the Tm1 ? x Yb x B12 cage-glass matrix is the origin of the metal-insulator transition observed in the achetypal strongly correlated electron system of YbB12. 相似文献
10.
Demishev S. V. Azarevich A. N. Bogach A. V. Gilmanov M. I. Filipov V. B. Shitsevalova N. Yu. Glushkov V. V. 《JETP Letters》2019,109(3):150-156
JETP Letters - The magnetic properties of the topological Kondo insulator SmB6 are studied in the temperature range T < 10 K in an applied magnetic field up to 5 T. The analysis of the... 相似文献