JETP Letters -- December 25, 1999 Volume 70, Issue 12, pp. 787-831 CONDENSED MATTER Magnetic flux distribution in type II superconductors with large demagnetization and a high edge barrier V. N. Zabenkin, L. A. Aksel'rod, A. A. Vorob'ev, G. P. Gordeev, and S. A. Churin Full Text: PDF (49 kB) Monopole, half-quantum vortex, and nexus in chiral superfluids and superconductors G. E. Volovik Full Text: PDF (35 kB) Observation of fine structure in the photoluminescence spectrum of an Er3+ ion in an amorphous silicon matrix A. A. Andreev, V. G. Golubev, A. V. Medvedev, A. B. Pevtsov, N. A. Feoktistov, V. F. Masterov, S. B. Aldabergenova, and P. C. Taylor Full Text: PDF (30 kB) Photoinduced transformation of luminescence centers in C60 crystals at high pressure V. D. Negrii and K. P. Meletov Full Text: PDF (47 kB) NONLINEAR DYNAMICS Nonlinear interaction of magnetoacoustic waves in yttrium orthoferrite B. A. Zon and G. V. Pakhomov Full Text: PDF (32 kB) Efficient nonlinear-optical frequency conversion in periodic media in the presence of diffraction of the pump and harmonic fields V. A. Belyakov Full Text: PDF (63 kB) Matched second-harmonic generation of ultrashort laser pulses in photonic crystals A. V. Tarasishin, A. M. Zheltikov, and S. A. Magnitskii Full Text: PDF (45 kB) COMMENTS Comment on the paper "Subwavelength diameter of light beams in active waveguides" S. K. Sekatskii and G. Dietler Full Text: PDF (20 kB) Reply to the comment of S. K. Sekatskii and G. Dietler T. I. Kuznetsova Full Text: PDF (26 kB) IN MEMORY OF OUR AUTHORS Full Text: PDF (13 kB)