für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book presents the results on magnetic, magneto-thermal and magneto-transport studies in some rare earth-based intermetallic compounds. The main aim of the present work was to investigate the magnetocaloric effect (MCE) and magnetoresistance (MR) in some intermetallics system, which have not received much attention. This was done by understanding the magnetic, magneto-thermal and magneto-transport behavior of these materials. With the objective of identifying some practical magnetic refrigerant materials, emphasis was given on systems showing first order magnetic transition, multiple transitions, metamagnetism etc. A giant magnetocaloric effect is expected in such systems. From the fundamental side, the aim was to understand the correlation among the magnetic, magnetocaloric and magneto-transport properties of these compounds. The thesis presents the work carried out on the magnetic, magnetocaloric and magnetoresistance behavior of the ternary compounds R1-xR`xMn2Si2-yGey[R,R`=RARE EARTH] and R2Ni2Sn [R=Ce, Nd, Sm, Gd and Tb] and pseudo binary compounds R2Al [R= Nd, Sm, Gd and Tb]. ····· 10361146394
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Although its long history, the mystery of ferromagnetism was revealed in the last century only, with the birth of quantum mechanics and the introduction of the spin. Besides the phenomena of magnetic ordering, strong correlations in condensed matter systems have other spectacular consequences, high temperature superconductivity above all. The theory of the origin of magnetic interactions remains one of the less developed areas of solid state physics, where large efforts, both in experiments and theory, concentrate. This book is mainly devoted to the investigation of two low-dimensional spin systems with spin-lattice coupling. In the former part, we focus on the role of coupling between spins and adiabatic phonons and of competitive interactions in stabilizing magnetization plateaus in antiferromagnetic Heisenberg models on square lattice. In the second part of the dissertation our attention moves to antiferromagnetic molecular rings, where a microscopic theory of magnetoelastic coupling is developed in order to interpret some unconventional features in experimental measurements. ····· 10361146370
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book is a contribution to the debate on the implications of the information theory of quantum systems for the description of numerous quantum phenomena of the electronic structure. It contains several applications of the basic concepts, techniques, and relations of the information theory to selected problems of atomic and molecular structure and chemical reactivity. Such treatment gives rise to the information-entropic representation of the atomic and molecular states, which complements the familiar energy representaton of the density-functional and wave-function-based theories. The most important role in this treatment is played by the concepts of information, complexity, and divergence. ····· 10361146361
····· lezzter Preis 79.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Atmospheric aerosols along with green house gases are the principal internal agents of climate change. However, the regional and global impact of atmospheric aerosols on climate is still uncertain owing to the large heterogeneity in their spatial and temporal distribution throughout the globe. Variability of sources or origin of different aerosols as well as their short residence times result in heterogeneity of aerosol characteristics on both regional and global domain. In the context of regional characterization of aerosols over South-East Asia, the north-eastern part of India is unique owing to its characteristic dense vegetation, vast water bodies, heavy rainfall pattern and the unique topography with mountains in the north, east and south and densely populated Indo Gangetic plains towards the west. In this PhD dissertation the optical and microphysical properties of aerosols have been studied and their impact on climate through radiative forcing is assessed over a remote continental location Dibrugarh, in north-east India. The aerosol environment of Dibrugarh is found to be heavily influenced by long range transportation together with local generation. ····· 10361146303
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This thesis is about the experimental implementation of a high-speed and robust quantum memory for light. A novel far off-resonant Raman approach to ensemble-based quantum memories in a room-temperature environment is developed and demonstrated. Storage and retrieval of sub-nanosecond, weak coherent light pulses at the single-photon-level with total efficiencies exceeding 30% and storage times of up to 4 s are achieved. The coherence of the memory is shown by directly interfering a copy of the incident signal with the retrieved signal from the memory. The unconditional noise floor of the memory is found to be low enough to operate the memory in the quantum regime at room temperature. Multiple readout of a single stored excitation is demonstrated, suggesting that 100% readout is possible in different temporal modes. Furthermore, first results regarding the storage and retrieval of polarisation encoded qubits are obtained. This and the memory s ability to operate in the quantum regime at room temperature with a low unconditional noise floor illustrate its potential usefulness for real world applications. ····· 10361146237
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The Monograph introduces the Optical implementation of quantum computation. It proposes a new scheme of implementing the qubit using electromagnetic modes in a waveguide and realizes some elementary logic functions associated to quantum computing. The designed logic gates were also verified using the `Beam Propagation Method`. The Deutsch Algorithm has been simulated using the designed logic gates. Finally the NOT gate implementation was experimentally demonstrated. ····· 10361146211
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This book describes experiments on the synthesis of single wall carbon nanotubes (SWNTs), fabrication of ultraclean CNT devices, and study of electronic properties of CNTs with transport measurements. The first part of this work describes the optimization of the synthesis parameters (by chemical vapor deposition - CVD) such as carbon precursors, gas flows, temperature, catalyst for the growth of high quality SWNTs. In all these parameters, the catalyst composition plays a very important role on the high selective growth of SWNTs with a narrow diameter distribution. The second part deals with the nanofabrication of ultra-clean CNT devices and the low temperature (40 mK) transport measurements of these CNT quantum dots. The level spectra of the electrons in the first shell are investigated using inelastic cotunneling spectroscopy in an axial magnetic field, which show a strong negative spin-orbit coupling of electron. We find that the sequence of electron shell filling in our case ( SO 0) is different from which would be obtained in the pure SU(4) Kondo regime ( SO = 0). Indeed, a pure orbital Kondo effect is observed in N=2e at a finite magnetic field. ····· 10361146170
····· lezzter Preis 49.90€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Albert von Brunn (1880-1942) war ein deutscher Astronom. In diesem im Original 1938 erschienenen Buch beschreibt er die grafische Lösung von Wechselstromproblemen. ····· ····· ····· 10361144394
für 29.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Albert von Brunn (1880-1942) war ein deutscher Astronom. In diesem im Original 1938 erschienenen Buch beschreibt er die grafische Lösung von Wechselstromproblemen. ····· ····· ····· 10361143059
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