The expression is derived for the coefficients of the Stevens Hamiltonian, which describes the effects of the crystalline electric field taking into account the screening of ligands by the distributed charge of conduction electrons. The Yukawa potential is used as the screening potential. The renormalization of the crystalline field coefficients of different order caused by the screening was estimated.
The heat capacities of the C15-type hydrides TaV2H1.1, TaV2H1.3 and TaV2D1.3 have been measured over the temperature range from 3.5 to 300 K. The electronic specific-heat coefficients γ are found to be considerably lower than in the hydrogen-free TaV2. For all the studied samples the heat capacity shows a peak which can be attributed to H(D) ordering. The ordering temperature increases with increasing hydrogen content and shows the isotope effect. We discuss the possible relation between this phase transition and the anomalous low-temperature motion of H(D) in TaV2Hx(Dx).
From the analysis of NQR spectra for Cu and on the basis of investigations of high-temperature electrical conductivity and thermal e.m.f. depending on oxygen pressure and temperature it is shown that in YBa 2 Cu 3 O 7−δ there are pair correlations of the oxygen atoms which lead to formation of the ( O 2)z− pairs, the charge of which is determined by deviation from stoichiometry.
The influence of disordering on the properties of high-T c superconductors is investigated. The results show that pairing takes place in the systems of localised electrons even in slightly disordered samples. Superconductivity exists till the radius of localisation exceeds the typical size of the Cooper pairing in highly disordered system.
The influence of radiation-induced disorder on the properties of high-Tc superconductors is investigated. The results show that effects of localization are essential even in the samples with high Tc.
Effects of electrical crystal field in high-Tc superconductor HoBa2Cu3O7 are investigated by inelastic neutron scattering. The scheme of splitting 4f-states which satisfactorily describes the neutron spectra as well as heat capacity data is obtained with the help of a well-known Lea-Leask-Wolf model.
physica status solidi (a)Volume 86, Issue 1 p. K59-K62 Short Note The structure, superconducting properties, and electrical resistivity of V2Zr and V2Hf irradiated with fast neutrons V. E. Arkhipov, V. E. Arkhipov Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorV. I. Voronin, V. I. Voronin Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorB. N. Goshchitskii, B. N. Goshchitskii Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorA. E. Karkin, A. E. Karkin Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorV. N. Kozhanov, V. N. Kozhanov Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorA. V. Mirmelshtein, A. V. Mirmelshtein Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorE. P. Romanov, E. P. Romanov Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this author V. E. Arkhipov, V. E. Arkhipov Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorV. I. Voronin, V. I. Voronin Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorB. N. Goshchitskii, B. N. Goshchitskii Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorA. E. Karkin, A. E. Karkin Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorV. N. Kozhanov, V. N. Kozhanov Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorA. V. Mirmelshtein, A. V. Mirmelshtein Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorE. P. Romanov, E. P. Romanov Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this author First published: 16 November 1984 https://doi.org/10.1002/pssa.2210860166Citations: 10 S. Kovalevskoi 18, 620219 Sverdlovsk GSP-1 70, USSR. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume86, Issue116 November 1984Pages K59-K62 RelatedInformation
Disordering in V3Si, irradiated by fast neutrons of fluence (0.1 to 4) × 1020neutrons/cm2, is investigated by neutron diffraction technique. It is shown, that in the investigated samples irradiated by maximum fluence the long-range-order degree remains sufficiently high, while the superconducting transition temperature falls down to ≈ 1.5 K. [Russian Text Ignored].
physica status solidi (a)Volume 61, Issue 2 p. K117-K122 Short Note Specific heat of NbbSn irradiated by fast neutrons† A. E. Karkin, A. E. Karkin Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorA. V. Mirmelshtein, A. V. Mirmelshtein Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorV. E. Arkhipov, V. E. Arkhipov Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorB. N. Goshchitskii, B. N. Goshchitskii Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this author A. E. Karkin, A. E. Karkin Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorA. V. Mirmelshtein, A. V. Mirmelshtein Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorV. E. Arkhipov, V. E. Arkhipov Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this authorB. N. Goshchitskii, B. N. Goshchitskii Institute of Metal Physics, Academy of Sciences of the USSR, Ural Scientific Centre, Sverdlovsk Search for more papers by this author First published: 16 October 1980 https://doi.org/10.1002/pssa.2210610251Citations: 6 † Dedicated to Prof. Dr. Dr. h. c. Dr. E. h. P. Görlich on the occasion of his 75th birthday ‡ Ul. S. Kovalevskoi 18, 620219, GSP-170, Sverdlovsk, USSR. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume61, Issue216 October 1980Pages K117-K122 RelatedInformation