Crystal Field Analysis PDF Download

Author: Nicolae Avram
Publisher:
ISBN: 9780080451480
Category :
Languages : en
Pages :

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Author: D. J. Newman
Publisher: Cambridge University Press
ISBN: 0521591244
Category : Science
Languages : en
Pages : 306

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This book, first published in 2000, is based on the modern conceptual understanding of crystal fields.

Author: J. Mulak
Publisher: Elsevier
ISBN: 0080530710
Category : Science
Languages : en
Pages : 319

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As it results from the very nature of things, the spherical symmetry of the surrounding of a site in a crystal lattice or an atom in a molecule can never occur. Therefore, the eigenfunctions and eigenvalues of any bound ion or atom have to differ from those of spherically symmetric respective free ions. In this way, the most simplified concept of the crystal field effect or ligand field effect in the case of individual molecules can be introduced. The conventional notion of the crystal field potential is narrowed to its non-spherical part only through ignoring the dominating spherical part which produces only a uniform energy shift of gravity centres of the free ion terms. It is well understood that the non-spherical part of the effective potential "seen" by open-shell electrons localized on a metal ion plays an essential role in most observed properties. Light adsorption, electron paramagnetic resonance, inelastic neutron scattering and basic characteristics derived from magnetic and thermal measurements, are only examples of a much wider class of experimental results dependent on it. The influence is discerned in all kinds of materials containing unpaired localized electrons: ionic crystals, semiconductors and metallic compounds including materials as intriguing as high-Tc superconductors, or heavy fermion systems. It is evident from the above that we deal with a widespread effect relative to all free ion terms except those which can stand the lowered symmetry, e.g. S-terms. Despite the universality of the phenomenon, the available handbooks on solid state physics pay only marginal attention to it, merely making mention of its occurrence. Present understanding of the origins of the crystal field potential differs essentially from the pioneering electrostatic picture postulated in the twenties. The considerable development of the theory that has been put forward since then can be traced in many regular articles scattered throughout the literature. The last two decades have left their impression as well but, to the authors' best knowledge, this period has not been closed with a more extended review. This has also motivated us to compile the main achievements in the field in the form of a book.

Author: Nicolae M. Avram
Publisher: Springer Science & Business Media
ISBN: 3642308384
Category : Science
Languages : en
Pages : 278

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"Optical Properties of 3d-Ions in Crystals: Spectroscopy and Crystal Field Analysis" discusses spectral, vibronic and magnetic properties of 3d-ions in a wide range of crystals, used as active media for solid state lasers and potential candidates for this role. Crystal field calculations (including first-principles calculations of energy levels and absorption spectra) and their comparison with experimental spectra, the Jahn-Teller effect, analysis of vibronic spectra, materials science applications are systematically presented. The book is intended for researchers and graduate students in crystal spectroscopy, materials science and optical applications. Dr. N.M. Avram is an Emeritus Professor at the Physics Department, West University of Timisoara, Romania; Dr. M.G. Brik is a Professor at the Institute of Physics, University of Tartu, Estonia.

Author: Li Wang
Publisher:
ISBN:
Category : Cerium group
Languages : en
Pages : 188

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Author: Satoru Sugano
Publisher: Elsevier
ISBN: 0323154794
Category : Science
Languages : en
Pages : 348

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Multiplets of Transition-Metal Ions in Crystals provides information pertinent to ligand field theory. This book discusses the fundamentals of quantum mechanics and the theory of atomic spectra. Comprised of 10 chapters, this book starts with an overview of the qualitative nature of the splitting of the energy level as well as the angular behavior of the wavefunctions. This text then examines the problem of obtaining the energy eigenvalues and eigenstates of the two-electron systems, in which two electrons are accommodated in the t2g and eg shells in a variety of ways. Other chapters discuss the ligand-field potential, which is invariant to any symmetry operation in the group to which symmetry of the system belongs. This book discusses as well the approximate method of expressing molecular orbitals (MO) by a suitable linear combination of atomic orbitals (AO). The final chapter discusses the MO in molecules and the self-consistent field theory of Hartree–Fock. This book is a valuable resource for research physicists, chemists, electronic engineers, and graduate students.

Author: Roger G. Burns
Publisher: Cambridge University Press
ISBN: 0521430771
Category : Science
Languages : en
Pages : 563

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The second edition of this classic book provides an updated look at crystal field theory and its applications.

Author: M. Gerloch
Publisher: CUP Archive
ISBN: 9780521249393
Category : Science
Languages : en
Pages : 616

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In this book, a synthesis of old and new notions straddling the disciplines of physics and chemistry is described.

Author: Andrzej Murasik
Publisher:
ISBN:
Category :
Languages : en
Pages : 17

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Author: Heidi Wines
Publisher:
ISBN:
Category : Oil fields
Languages : en
Pages : 162

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