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Impurity Effects On Superconductivity And Magnetism In Heavy Electron And High Transition Temperature Copper Oxide Compounds
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Book Synopsis Impurity Effects on Superconductivity and Magnetism in Heavy Electron and High Transition Temperature Copper Oxide Compounds by : Yacine Dalichaouch
Download or read book Impurity Effects on Superconductivity and Magnetism in Heavy Electron and High Transition Temperature Copper Oxide Compounds written by Yacine Dalichaouch and published by . This book was released on 1988 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Copper Oxide Superconductors by : Charles P. Poole, Jr.
Download or read book Copper Oxide Superconductors written by Charles P. Poole, Jr. and published by Wiley-Interscience. This book was released on 1988-11-25 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study reviews the experimental aspects of oxide superconductivity, with transition temperatures from 30 K to above 100 K. It discusses experimental descriptions of principle superconducting compounds and covers VSC theory, electron-photon interaction and new theoretical models.
Book Synopsis Crystal Chemistry of High-Tc Superconducting Copper Oxides by : Bernard Raveau
Download or read book Crystal Chemistry of High-Tc Superconducting Copper Oxides written by Bernard Raveau and published by Springer Science & Business Media. This book was released on 2013-03-12 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent discovery of high-temperature superconductivity in copper based oxides is an event of major importance not only with respect to the physical phenomenon itself but also because it definitely shows that solid state chemistry, and especially the crystal chemistry of oxides, has a crucial place in the synthesis and understanding of new materials for future appli cations. The numerous papers published in the field of high Tc supercon ductors in the last five years demonstrate that the great complexity of these materials necessitates a close collaboration between physicists and solid state chemists. This book is based to a large extent on our experience of the crystal chemistry of copper oxides, which we have been studying in the laboratory for more than twelve years, but it also summarizes the main results which have been obtained for these compounds in the last five years relating to their spectacular superconducting properties. We have focused on the struc ture, chemical bonding and nonstoichiometry of these materials, bearing in mind that redox reactions are the key to the optimization of their supercon ducting properties, owing to the importance of the mixed valence of copper and its Jahn-Teller effect. We have also drawn on studies of extended defects by high-resolution electron microscopy and on their creation by ir radiation effects.
Book Synopsis Chemical And Structural Aspects Of High Temperature Superconductors by : C N R Rao
Download or read book Chemical And Structural Aspects Of High Temperature Superconductors written by C N R Rao and published by World Scientific. This book was released on 1988-09-01 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ten Years of Superconductivity: 1980–1990 by : H.R. Ott
Download or read book Ten Years of Superconductivity: 1980–1990 written by H.R. Ott and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unexpected and therefore really amazing discovery of J. G. Bednorz and K. A. R32 Miiller , that certain oxide compounds enter a superconducting state at temperatures above 30 K pushed research on superconductivity into the limelight of science in general in a way that seemed reserved for a while for high-energy or particle physics only. The common interest was then even more aroused when subsequent work rather quickly established that in the same class of compounds (oxides), critical temperatures of superconductivity above R36 the boiling point of nitrogen could be achieved . It might therefore be expected, that this entire review would solely deal with superconductivity at high temperatures, i. e. , above the boiling point of hydrogen. From my point of view, however, any unexpected occurrence of superconductivity is a challenge to scientists interested either in the physics of this phenomenon or in its materials-science aspects. In this respect, the last ten years have been quite revolutionary in the sense that on various occasions, superconductivity was discovered in materials whose physical properties were not obviously favourable for adopting this ground state. This period started with the observation that homogeneous coexistence of superconductivity and magnetic order in the same material was possible. Later it was found that electrons whose effective mass was tremendously enhanced by magnetic interactions, may also form a superconducting state, namely in materials that were subsequently identified as heavy electron superconductors.
Book Synopsis Introduction to Unconventional Superconductivity by : V.P. Mineev
Download or read book Introduction to Unconventional Superconductivity written by V.P. Mineev and published by CRC Press. This book was released on 1999-09-21 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unconventional superconductivity (or superconductivity with a nontrivial Cooper pairing) is believed to exist in many heavy-fermion materials as well as in high temperature superconductors, and is a subject of great theoretical and experimental interest. The remarkable progress achieved in this field has not been reflected in published monographs and textbooks, and there is a gap between current research and the standard education of solid state physicists in the theory of superconductivity. This book is intended to meet this information need and includes the authors' original results.
Book Synopsis Superconducting and Normal Compounds by : Scott Harris Bloom
Download or read book Superconducting and Normal Compounds written by Scott Harris Bloom and published by . This book was released on 1989 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental results of the effects of high pressure and/or high magnetic fields are presented for three different classes of compounds; magnetic systems based on high temperature superconductors, a heavy fermion system, and a ferromagnetic semiconductor. The experiments involving high temperature superconductors consisted of substituting either Gd for Y or Zn for Cu in the canonical Y-based 1-2-3 compound. For the Gd substituted compound, high pressure had a small positive effect on T$\sb{\rm N}$, the magnetic ordering temperature, in both the superconducting and non-superconducting phases. This result is discussed in terms of a modified RKKY-like interaction between the Gd ions. For the Zn-doped compound T$\sb{\rm C}$ dropped rapidly upon the addition of small amounts of Zn with T$\sb{\rm C}$ going to zero at approximately 10 at.% Zn, which is unusual because Zn is a divalent non-magnetic impurity. Additionally, T$\sb{\rm C}$ decreased upon application of high pressure in contrast to the undoped system which showed T$\sb{\rm C}$ increasing with pressure. These results indicate that the d-holes associated with the Cu-O hybridized bonds are becoming localized in the presence of Zn. For the heavy fermion compound U(In$\sb{\rm 1-x}$Sn$\sb{\rm x}$)$\sb3$, large enhancements in the specific heat and magnetic susceptibility, indicative of heavy fermion behavior, were observed near x = 0.6. Theoretical fits to Fermi liquid type theories show reasonable agreement with experimental results. For U(Ga$\sb{\rm 1-x}$ Ge$\sb{\rm x}$)$\sb3$ no enhancement in the specific heat or magnetic susceptibility was observed. However one unusual property of this compound is that the magnetic susceptibility increased from low to room temperature indicative of a very high spin fluctuation temperature, and therefore very strong f-electron-conduction electron hybridization. The third compound, UFe$\sb4$P$\sp{12}$ is the first known U-based ferromagnetic semiconductor. This compound displayed a large shift in T$\sb{\rm C}$ with the application of high pressure. This result appears consistent with a Bloembergen-Rowlands coupling mechanism between the U-atoms. The appendix contains a discussion of results obtained for the semimagnetic semiconductor (Cd, Fe)Se which showed the absence of bound magnetic polarons in contrast to (Cd, Mn)Se. This shows that the Fe has zero moment in zero magnetic field.
Download or read book Digests of Intermag written by and published by . This book was released on 1989 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineered Materials Abstracts written by and published by . This book was released on 1993-04 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Superconductivity and Magnetism in Selected Filled Skutterudites and Heavy Fermion Systems by : Ram Bahadur Adhikari
Download or read book Superconductivity and Magnetism in Selected Filled Skutterudites and Heavy Fermion Systems written by Ram Bahadur Adhikari and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strongly correlated electron systems constitute a rich reservoir for interesting physical phenomena. The competition and interplay between the localized magnetic moments in partially filled d or f electron systems and the itinerant conduction electrons states lead to novel phenomena such as complex magnetic properties, unconventional superconductivity, non-Fermi-liquid behavior, and the coexistence of superconductivity and magnetism. Such intriguing physical phenomena can be achieved by tuning the system with a control parameter, such as chemical composition, applied pressure, and magnetic field. It is interesting to study the chemical substitution effects on the correlated f electron system along with magnetic field to explore their complex phase diagram. This dissertation work focuses on experimental studies of the Ce and Eu substituted filled skutterudite system PrPt4Ge12 over a wide range of doping, magnetic field, and temperature using heat capacity measurements. The first study will focus on the specific heat and electrical resistivity measurements performed on the Pr[subscript 1-x]Ce[subscript x]Pt4Ge12 crystals. We have found that Ce monotonically suppresses the superconducting transition temperature T[subscript c] and a small Ce concentration of x = 0.14 brings the T[subscript c] to as low as 0.6 K. We further have demonstrate that small Ce substitution does not affect the multiband nature of superconductivity seen previously in the parent compound PrPt4Ge12. On the other hand, our data provide evidence that one of the two gaps is nodal in the parent compound and that Ce substitution gradually suppresses the value of the nodal gap. To understand the possible interplay between superconductivity and magnetism, we study the same parent system PrPt4Ge12, this time substituting Pr with europium. The compound so formed is Pr[subscript 1-x]Eu[subscript x]Pt4Ge12 whose end members are superconductor (x = 0) and antiferromagnetic (x = 1) at lower temperatures, so that there is the possibility of interaction between superconductivity and magnetism in the intermediate doping range. The increase of Eu concentration leads to a suppression of the superconducting transition temperature as in the case of cerium substitution. There is a low temperature heat capacity anomaly present over the whole doping range. Our analysis of the heat capacity data shows that in alloys with x = 0.5 the Schottky peaks in the heat capacity in the superconducting state appear to be due to Zeeman splitting by an internal magnetic field. Our theoretical analysis suggests that this internal magnetic field is a result of short-range antiferromagnetic correlations between the europium ions. We further investigated the effect of Eu substitution on the Pr site through heat capacity measurements on the same system in an applied magnetic field. The low temperature heat capacity peaks seen in the samples with x
Download or read book Bibliography written by Pierre Villars and published by Walter de Gruyter. This book was released on 2012-12-21 with total page 1827 pages. Available in PDF, EPUB and Kindle. Book excerpt: By browsing about 10 000 000 scientific articles of over 200 major journals mainly in a 'cover to cover approach' some 200 000 publications were selected. The extracted data is part of the following fundamental material research fields: crystal structures (S), phase diagrams (also called constitution) (C) and the comprehensive field of intrinsic physical properties (P). This work has been done systematically starting with the literature going back to 1900. The above mentioned research field codes (S, C, P) as well as the chemical systems investigated in each publication were included in the present work. The aim of the Inorganic Substances Bibliography is to provide researchers with a comprehensive compilation of all up to now published scientific publications on inorganic systems in only three handy volumes.
Book Synopsis High Tc Superconductors: Magnetic Interactions - Proceedings Of The Workshop by : Lawrence H Bennett
Download or read book High Tc Superconductors: Magnetic Interactions - Proceedings Of The Workshop written by Lawrence H Bennett and published by World Scientific. This book was released on 1989-04-01 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Workshop addresses the role of magnetic interactions in the various aspects of high Tc superconducting materials, including the fundamental nature of the elementary excitations and their effect on the measured microscopic and macroscopic magnetic properties of these materials. Applications involving the magnetic behaviour of high Tc superconductors is a special feature of this Workshop.
Author :International Union of Pure and Applied Chemistry Publisher :Blackwell Science ISBN 13 : Total Pages :216 pages Book Rating :4.3/5 (91 download)
Book Synopsis Chemistry of Oxide Superconductors by : International Union of Pure and Applied Chemistry
Download or read book Chemistry of Oxide Superconductors written by International Union of Pure and Applied Chemistry and published by Blackwell Science. This book was released on 1988 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended to highlight the chemical aspects of oxide superconductors, giving an idea as to how solid state chemistry (structure, bonding and stoichiometry) play a crucial role in the superconductivity of these high-temperature oxide superconductors.
Book Synopsis 1989 Digests of INTERMAG '89 International Magnetics Conference, March 28-31, Mayflower Hotel, Washington, D.C., USA by :
Download or read book 1989 Digests of INTERMAG '89 International Magnetics Conference, March 28-31, Mayflower Hotel, Washington, D.C., USA written by and published by . This book was released on 1989 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis OAR Cumulative Index of Research Results by :
Download or read book OAR Cumulative Index of Research Results written by and published by . This book was released on 1967 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
