Table of contents

I. Introduction 548 1. Brief data on the electronic structure of transition element atoms 548 2. Some data on the electronic properties of transition metals 553 3. General qualitative ideas on the electronic structure of crystals containing transition element atoms 566 II. Elementary Electron Theory of Transition Metals 569 4. Band model of transition d-metal crystals 570 5. Model of interacting valence (outer) electrons and electrons of the inner unfilled shells [s–d(f) exchange model] 577 Literature. I 589 III. Properties of spin system of transition metal. 6. Hamiltonian of the electron system of transition metal. 7. Spin polarization of conduction electrons. 8. Indirect exchange interaction between electrons of spin-unsaturated shells via the conduction electrons. 9. Spin-wave theory of ferromagnetic metal. 10. Spin-wave theory of antiferromagnetic metal. 11. Magnetic relaxation and resonance in ferromagnetic and antiferromagnetic metals. 12. Magnetic scattering of slow neutrons in a ferromagnetic metal. IV. System of conduction electrons in a transition metal. 13. Energy of conduction electrons in a ferromagnetic transition metal. 14. Effective interaction between conduction electrons through the spin waves and the influence of this interaction on the superconducting state. 15. Condition for the existence of a superconducting state in a ferromagnetic metal. 16. Anomalous electric resistivity of ferromagnetic metal. V. Conclusion. Literature, II.

From the book "Ocherki istorii russkoi nauki," (Outlines of the History of Russian Science), Moscow, AN SSSR, 1950, pp. 149-166.

Report presented at the Physics Institute of the U.S.S.R Academy of Sciences at its meeting of March 12, 1962, commemorating the 50th anniversary of Lebedev's death.

Talk at the Physics Institute, Academy of Sciences U.S.S.R., at a meeting on March 12, 1962, commemorating the fiftieth anniversary of the death of P. N. Lebedev.

Report at session of the Scientific Council, Physical Institute of the Academy of Sciences of the U.S.S.R., held February 12, 1962, in memory of G. S. Landsberg.

Report at session of the scientific council of the Physics Institute of the Academy of Sciences of the U.S.S.R. held in memory of G. S. Landsberg, February 12, 1962.

Report at session of the Scientific Council, Physics Institute of the Academy of Sciences of the U.S.S.R., held February 12, 1962, in memory of G. S. Landsberg.

Introduction. 1. Complex Dielectric Tensor _ij(ω, k) and Normal Waves in the Medium. a) The Tensor _ij(ω, k) and Its Properties. b) Normal Electromagnetic Waves in a Medium. Transverse and Longitudinal Waves. "Fictitious" Longitudinal Waves and "Polarization Waves". c) Energy and Other Relations for Waves in an Anisotropic Medium. 2. The Tensor _ij(ω, k) in Crystals. a) The Concept of the Tensor _ij(ω, k) for Crystals 337. b) The Case of Weak Spatial Dispersion (a/λ ≪ 1). Cited Literature, Part I 3. Crystal optics with allowance for spatial dispersion 675 a) New wave near absorption line in gyrotropic crystals 676 b) New waves in non-gyrotropic crystals 679 c) Optical anisotropy of cubic crystals. Quadrupole absorption lines 681 d) Effect of mechanical stresses and external electric and magnetic fields 688 e) The problem of boundary conditions 694 f) Experimental investigations of effects of spatial dispersion in crystal optics 695 4. Quantum mechanical calculation of the tensor _ij(ω, k) 698 a) Quantum mechanical expression for _ij(ω, k) 698 b) Mechanical excitons and the tensor _ij(ω, k) in molecular crystals and in the case of the classical oscillator model 701 c) Absorption mechanism and calculations 705 Concluding remarks 706 Cited literature, part II.