Nuclear Magnetic Resonance in Superconducting Tin PDF Download
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Author: Gaylord Marvin Androes
Publisher:
ISBN:
Category : Nuclear induction
Languages : en
Pages : 162
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Author: Gaylord Marvin Androes
Publisher:
ISBN:
Category : Nuclear induction
Languages : en
Pages : 162
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Author: Fulton Wright (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 56
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The Knight shift in the superconducting state has been observed in samples containing various sizes of small tin particles. The three main samples were constructed by vacuum evaporation of alternate layers of metal and dielectric (silicon monoxide). The particles are in the form of platelets whose diameter and thickness were measured with an electron microscope. The geometric means of the particle dimensions were 170, 300, and 570 A. The fractions of the normal state shift (referred to alpha tin) remaining at zero temperature were 84, 74, 62 percent respectively. Three other samples produced by a variety of processes gave results consistent with those of the main samples. The data fit well the theory of spin-reversing scattering through spin-orbit coupling which has been proposed to explain the finite Knight shift in superconductors. Two other possible contributions, a shift due to Van Vleck type orbital susceptibility and crystalline field spin-orbit coupling, cannot be ruled out theoretically but do not appear important experimentally. The problem of an extra NMR line width in the small particle samples is discussed. (Author).
Author: Franziska Hammerath
Publisher: Springer Science & Business Media
ISBN: 3834824232
Category : Science
Languages : en
Pages : 183
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Nuclear Magnetic Resonance (NMR) has been a fundamental player in the studies of superconducting materials for many decades. This local probe technique allows for the study of the static electronic properties as well as of the low energy excitations of the electrons in the normal and the superconducting state. On that account it has also been widely applied to Fe-based superconductors from the very beginning of their discovery in February 2008. This dissertation comprises some of these very first NMR results, reflecting the unconventional nature of superconductivity and its strong link to magnetism in the investigated compounds LaO1–xFxFeAs and LiFeAs.
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 764
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Author: Edward Mark Dickson
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
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Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1112
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Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 1116
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Author: Michael Stuart Adler
Publisher:
ISBN:
Category :
Languages : en
Pages : 490
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Author: Frank A. Bovey
Publisher: Elsevier
ISBN: 0080916996
Category : Science
Languages : en
Pages : 668
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Book Description
Nuclear Magnetic Resonance Spectroscopy, Second Edition focuses on two-dimensional nuclear magnetic resonance (NMR) spectroscopy, high resolution NMR of solids, water suppression, multiple quantum spectroscopy, and NMR imaging. The selection first takes a look at the fundamental principles and experimental methods. Discussions focus on the NMR phenomenon, dipolar broadening and spin-spin relaxation, nuclear electric quadrupole relaxation, saturation, magnetic shielding and chemical shift, magnetic field, transitions between the nuclear energy levels, and resolution and sensitivity considerations. The manuscript then ponders on chemical shift, coupling of nuclear spins, and nuclear relaxation and chemical rate processes. Topics include spin lattice relaxation, spin-spin relaxation, spin decoupling and associated techniques, and description and analysis of spin systems. The text examines two-dimensional NMR spectroscopy, macromolecules, and NMR of solids, including magic angle spinning, cross polarization, proton dipolar broadening, biopolymers, and chain motion in macromolecules. The selection is a valuable source of data for readers interested in nuclear magnetic resonance spectroscopy.
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 1330
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