13 Result(s)

Article

On the Usefulness of the LDA+U Calculations of the Crystal Field in Insulators

The PrO₂ dioxide is an insulator with band gap of 6 eV. The 4f¹ ground-state configuration of Pr⁴⁺ in cubic-symmetry sites is subjected to a strong crystal-field (CF) interaction. The available inelastic-neutron-...

M. Diviš, J. Rusz, V. Nekvasil in Czechoslovak Journal of Physics (2004)

Article

CSMAG'01 conference summary

V. Nekvasil in Czechoslovak Journal of Physics (2002)

Article

Infrared transmission study of Pr ₂ CuO ₄ crystal-field excitations

We present an infrared crystal-field study of Pr₂CuO₄ single crystals and thin films. Excitations from the ground state multiplet ³H₄ to the ³H₅, ³H₆, ³F₂ and ³F₃ excited multiplets are observed in both single cr...

G. Riou, S. Jandl, M. Poirier, V. Nekvasil, M. Diviš… in The European Physical Journal B (2001)

Article

Magnetooptical Spectroscopy of the 5D4 → 7F5 Radiative Transition of the Non-Kramers Tb3+ Ion in an Yttrium-Aluminum Garnet

Spectra of luminescence and magnetic circular polarization of luminescence corresponding to the ⁵ D ₄ → ⁷ F ₅ radiative transition of the Tb³⁺ ion in an yttrium-aluminum garnet are studied experimentally. In the ...

U. V. Valiev, B. Yu. Sokolov, V. Nekvasil, R. A. Rupp, M. Falli in Russian Physics Journal (2001)

Chapter and Conference Paper

On the Valency of Pr in (Y_1−x Pr_x)Ba₂Cu₃O₇

We present specific heat measurements of (Y,Pr)Ba₂Cu₃O₇ in external fields up to 11 T. The results are analysed in terms of crystalline electric field (CF) effects and indicate that in these systems Pr appears to...

G. Schaudy, T. Holubar, M. Forsthuber… in Electronic Properties of High-T_c Supercond… (1993)

Article

Magnetic linear birefringence in paramagnetic rare-earth garnets YbAG, YbGG, and GdGG in high magnetic fields and at low temperatures

A theoretical and experimental study of the magnetic linear birefringence (MLB) in paramagnetic rare-earth garnets YbAG, YbGG, and GdGG is presented. Starting from the microscopic theory of the polarizability ...

G. Ya. Guseynov, R. Z. Levitin, K. M. Mukimov… in Czechoslovak Journal of Physics B (1987)

Article

Magnetocrystalline anisotropy of samarium garnets

V. Nekvasil in Czechoslovak Journal of Physics B (1984)

Article

Dependence of crystal field in rare earth garnets on the structure of coordination dodecahedron

The superposition model is used to relate the crystal field parameters reported in various rare earth garnets to the structure of the coordination dodecahedron. The results obtained confirm the overall consist...

V. Nekvasil in Czechoslovak Journal of Physics B (1979)

Article

Correlations between site geometries and level energies in the laser system Nd_1−x Y _x P₅O₁₄

The pentaphosphate system Nd_1−x Y _x P₅O₁₄ covers four crystalline phases with five different site geometries for Nd. We determined the⁴F_3/2,⁴I_13/2,⁴I_11/2,⁴I_9/2 st...

W. W. Krühler, G. Huber, H. G. Danielmeyer, V. Nekvasil in Applied physics (1975)

Article

On the magnetic arrangement in the diamagnetically substituted rare earths iron garnets

The magnetic arrangement in the rare earth iron garnet with diamagnetic substitution in octahedral sites, at 0 K, is calculated on the basis of the model of localized canting, when the exchange interaction bet...

V. Nekvasil in Czechoslovak Journal of Physics B (1975)

Article

Anisotropy of the magnetic moment of neodymium in garnets

The theoretical and experimental study of the magnetic moments of Nd³⁺ ions in aluminium and gallium garnets respectively was performed. The calculation of the field dependence of the magnetic moment of Nd³⁺ in Y...

V. Nekvasil, V. Roskovec, F. Zounová, P. Novotný in Czechoslovak Journal of Physics B (1974)

Article

Anisotropy of magnetization in Nd₃Sc_1·35Fe_3·65O₁₂ garnet

V. Roskovec, V. Nekvasil, F. Zounová, J. Loriers… in Czechoslovak Journal of Physics B (1971)

Article

Paramagnetic resonance Cr³⁺ in yttrium

V. Nekvasil in Czechoslovak Journal of Physics B (1968)