Download or read book Electronic Raman Scattering Theory in Rare Earth Garnets written by Joan L. Lewis and published by . This book was released on 1971 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work involves the calculation of the relative Raman scattering intensities of low-lying electronic transitions in rare earth garnets. An evaluation is made as to the usefulness of such calculations in testing the crystal field wavefunctions of rare earth garnets. The garnets studied are paramagnetic YbGaG, YbAlG, DyGaG, and DyAlG, DyAlG is also studied at temperatures below its ordering temperature (T sub N = 2.5 degrees K) and with an applied magnetic field. In order to obtain crystal field wavefunctions necessary for the relative Raman intensity calculations, crystal field analysis are done in this work for DyGaG and DyAlG. For YbGaG and YbAlG the wavefunctions of Pearson (1971) are used in the intensity calculations. Simple expressions of the relative scattering intensities are derived for the paramagnetic and the antiferromagnetic cases. Such expressions are obtained for several different combinations of the polarizations of the incident and scattered light. (Author).
Download or read book Electronic Raman Scattering in Rare Earth Garnets written by Joan Loomis Lewis and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Resonance Electronic Raman Scattering in Rare Earth Crystals written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The intensities of Raman scattering transitions between electronic energy levels of trivalent rare earth ions doped into transparent crystals were measured and compared to theory. A particle emphasis was placed on the examination of the effect of intermediate state resonances on the Raman scattering intensities. Two specific systems were studied: Ce/sup 3 +/(4f1) in single crystals of LuPO4 and Er/sup 3 +/(4f11) in single crystals of ErPO4. 134 refs., 92 figs., 33 tabs.
Download or read book Resonance Electronic Raman Scattering in Rare Earth Crystals written by Glen Munroe Williams and published by . This book was released on 1988 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronic Raman Scattering in Rare Earth Phosphate Crystals written by Philippe Claude Becker and published by . This book was released on 1986 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Field Studies of Electronic Raman Scattering in Rare earth Zircons written by Donato Cardarelli and published by . This book was released on 1979 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronic Raman Effect in Garnets Tunable Infrared Lasers and Quantum Counters written by Richard K. Chang and published by . This book was released on 1974 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Raman technique has been applied to study some basic properties of rare-earth garnets. Preliminary investigations have been performed on a tunable IR quantum counter and Ho:YIG laser. Using Raman scattering, the following were determined: (1) the phonon energy and symmetry assignments of numerous garnets (YAlG, DyAlG, YbAlG, LuAlG, YGaG, DyGaG, YbGaG, LuGaG, YIG, DyIg, ErIG, and YbIG); (2) the energy of the lower crystal-field levels (10-4000/cm) in YbAlG, YbGaG, DyAlG, DyGaG, and ErIG; (3) the dipole and exchange-field splittings of several electronic levels for DyAlG below its Neel temperature; and (4) the accuracy of the crystal-field parameters by comparing the calculated with the observed Raman intensity. The large anisotropic exchange interaction between the Fe3+ and Re3+ ions in Re:YIG can form the basis for tunable IR quantum counters and lasers. A tunable quantum counter in the 5 micrometer region is proposed by using Pr:YIG. The author has achieved laser action by optically pumping with a Nd:glass laser into the absorption band of the host crystal (YIG). Based on this achievement, it is estimated that lasing from a 100 micrometer thick slab of Ho:YIG is possible by pumping with a single GaAs laser diode.
Download or read book Electronic and Magnetic Raman Effect in Garnets written by Richard K. Chang and published by . This book was released on 1971 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report summarizes the results of research of the electronic and magnetic Raman effect in garnets. The principal results include the determination of Raman active phonons and electronic levels in DyAlG, DyGaG, YbAlG, YbGaG, and LuAlG. The experimental and theoretical techniques developed during this period can be readily applied to all other rare-earth garnets; in particular, rare earth in iron garnets, which may offer potentials for tunable IR quantum detectors and tunable lasers. (Author).
Download or read book A Comparison of Far Infrared and Raman Spectra of Some Rare Earth Garnet Single Crystals written by J. A. Koningstein and published by . This book was released on 1969 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: From a comparison of the far-infrared and Raman spectra of some rare earth aluminum garnet crystals it has become possible to assign some electronic Raman transitions. It has also been observed that one of the phonon modes shifts in going from the yttrium aluminum to the ytterbium aluminum garnet compound and there seems no doubt about the assignment of such phonon modes. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Light Scattering Spectra of Solids written by George B. Wright and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 741 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Light Scattering Spectra of Solids was held at New York University on September 3, 4, 5, 6, 1968. The Conference received financial support from the U. S. Army Research Office (Durham), The New York State Science and Technology Foundation, the U. S. Office of Naval Research, and The Graduate School of Arts and Sciences of New York University. Co-sponsoring the Conference was the International Union of Pure and Applied Physics. The initial conception for the Light Scattering Conference arose from informal discussions held by Professor Eli Burstein, Professor Marvin Silver (representing the U. S. Army Research Office) and Professor Joseph Birman, late in 1966. In early discussions a format was put forth for a meeting to be held the following year, re viewing the state of the art, and emphasizing novel developments which had 9ccurred since the 1965 International Colloquium on Scattering Spectra of Crystals held in Paris (proceedings published in Le Journal de Physique, Volume 26, November 1965).
Download or read book Light Scattering in Solids VII written by Manuel Cardona and published by Springer. This book was released on 2014-03-12 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the seventh volume of a well-established series in which expert practitioners discuss topical aspects of light scattering in solids. Emphasis is placed on electronic excitations between crystal-field split levels of transition-metal and rare-earth ions in crystals, among them high-Tc superconductors and magnetic excitations that appear in superlattices containing magnetic metals. The contents of this volume again demonstrates the usefulness of Raman spectroscopy for the investigation and characterization of this class of materials. It will be useful to advanced students and to all researchers who apply Raman spectroscopy in their work.
Download or read book Vibrational Spectroscopy of Solids written by Peter Miles Anson Sherwood and published by CUP Archive. This book was released on 1972-09-21 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1972 monograph is devoted to the analysis and interpretation of the infrared and Raman spectra of solid compounds, frequently used for their identification and characterization. It was thought unsatisfactory to analyse such spectra by the theory applicable to gas-phase samples, though this was frequently done. Furthermore, the results obtained by far infrared and laser Raman spectrometers, which detect the movement of atoms and/or molecules as a whole, had no gas-phase analogy. A separate approach to solid state vibrational spectra was therefore proposed within this volume. Dr Sherwood describes the solid state physics of vibrational spectroscopy and extends it to the more complex structures of low symmetry. He assumes an understanding of the infrared and Raman spectra of gases.
Download or read book Catalog of Copyright Entries Third Series written by Library of Congress. Copyright Office and published by Copyright Office, Library of Congress. This book was released on 1974 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Excited States Of Transition Elements Proceedings Of The 2nd International School written by Strek W and published by World Scientific. This book was released on 1992-09-30 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the recent advances in spectroscopy and theoretical modeling relevant to the interpretation of luminescence and laser phenomena in solid state materials. The available solid state matrices in crystalline and glassy states and the full range of activaters-transition metal ions, rare earth ions and actinides are considered here. Processes of activator excitation, energy transfer between activators and relaxation of excited states are particularly stressed.
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1970 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic And Superconducting Materials In 2 Vols Procs Of The First Regional Conference written by M Akhavan and published by World Scientific. This book was released on 2000-09-27 with total page 1203 pages. Available in PDF, EPUB and Kindle. Book excerpt: The great breakthroughs in the science and technology of superconducting and magnetic materials in recent years promoted many outstanding representatives of various scientific disciplines (physics, chemistry and materials science) to present their latest findings in a scientific atmosphere of the highest standard at the MSM-99 conference. Over 200 eminent scientists from 50 countries gathered to discuss the physics, materials science and application of magnetic and superconducting materials, and to foster research and development collaborations between the scientists and technologists of the regional countries and also with the international scientific community.The main topics of this book are the physics, materials science and application of magnetic and superconducting materials having a close relationship between the strong correlated electron system and magnetism.
