Author: Ying ChenPublisher:
ISBN: 9780493876849
Category :
Languages : en
Pages : 149
Book Description
Investigation of Quasi-one Dimensional Antiferromagnets by Neutron Scattering
Author: Ying ChenPublisher:
ISBN: 9780493876849
Category :
Languages : en
Pages : 149
Book Description
Neutron Scattering Study of Magnetic Excitation in Quasi-one-dimensional Triangular Lattice Antiferromagnet CsVCl3
Author: Hiroaki KadowakiNeutron Scattering Studies of Three One-dimensional Antiferromagnets
Author: C. B. KenzelmannPublisher:
ISBN:
Category : Antiferromagnetism
Languages : en
Pages : 398
Book Description
Neutron Scattering Investigations of Zero- and One-dimensional Quantum Magnets
Author: Oliver PieperPublisher:
ISBN: 9783832527303
Category :
Languages : en
Pages : 270
Book Description
This thesis deals with the investigation of two different types of low-dimensional quantum magnets using the technique of neutron scattering.In the first part, the magnetic properties of three Mn_6-based single molecule magnets are explored by means of inelastic neutron scattering. The experimental data reveal that small structural distortions of the molecular geometry produce a significant effect on the energy level diagram and therefore on the magnetic properties of the molecules. It will be shown that the giant spin model completely fails to describe the spin level structure of the ground spin multiplets and that the excited S-multiplets play a key role in determining the effective energy barrier for the magnetization reversal.The second part of this thesis presents an in-depth study of the nuclear and magnetic properties of the quasi-one-dimensional Heisenberg antiferromagnet CaV_2O_4. The magnetism in this system arises from the partially filled t_{2g-levels of the V^{3+-ions, which in addition give an orbital degree of freedom to the system.Single crystal and powder neutron diffraction as well as neutron spectroscopy are used to determine the nuclear and magnetic structure as well as the complex excitation spectrum of CaV_2O_4. The results are analysed theoretically and from this the leading exchange paths are deduced and discussed in terms of orbital ordering.
Neutron Scattering Studies of Three One-dimensional Antiferromagnets
Author: Michel KenzelmannA neutron scattering study of the quasi-one-dimensional, dilute ising-like antiferromagnet csco sub(0.83)mg sub(0.17)br sub(3).
Author: R. B. RoggePublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
A chf look-up table, applicable for both the loss-of-regulation (lor) and loss-of-coolant (loc) accident conditions, has been derived for a string of horizontal, candu-type, 37-element bundles. the bundle-chf look-up table is primarily based on the chf table for tubes and the correction factors accounting for the differences in geometry (between tubes and bundles) and in channel orientation (between vertical and horizontal flows). experimental results of chf in bundles are subsequently used to improve the accuracy of the table. the table-chf values have been adjusted to provide a correct and smooth parametric trend. within the ranges of experimental data, the prediction accuracy of the chf look-up table for bundles is excellent: rms errors are 4.6 percent for the data from the 6-m uniformly heated bundles, 5.8 percent from the 3-m uniformly heated bundles, 7.4 percent from the 1-m uniformly heated bundles and 6.8 percent for the initial dryout data from the 6-m non-uniformly heated bundles. predictions from the chf look-up table for bundles have also been compared against the bundle chf results obtained with freon-12, using the h2o/f-12 modelling parameters. these freon chf tests covered a range of mass flux from 1200-7450 kg.m-2.s-1 (water equivalent conditions). the overall rms error for four separate horizontal bundle-chf tests is 6.33 percent and for five vertical bundle-chf tests it is 5.09 percent. outside the ranges of the data base, the effect of flow stratification has been accounted for in the bundle-chf table by employing a semi-empirical correction factor which is obtained from a balance of turbulent force and gravitational forces. at conditions corresponding to stratified smooth or stratified wavy flow, the table values are equal to zero.
Magnetic and Neutron Scattering Study of One-dimensional Heisenberg Antiferromagnet CsVCl3
Author: KinshirÅ HirakawaNeutron scattering study of the one-dimensional Ising antiferromagnet CsCoC13
Author: Hideki YoshizawaEnergy Research Abstracts
Author: Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 806
Book Description
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.
Author: Hiroaki Kadowaki