THE NEW EXPERIMENTAL RESULTS ON MAGNETIC ORDER IN bcc SOLID 3He ARE WELL EXPLAINED BY PLANAR FOUR SPIN EXCHANGE
نویسندگان
چکیده
منابع مشابه
MAGNETIC PROPERTIES OF SOLID 3He WITH 4He IMPURITIES IN A HUBBARD-LIKE MODEL
A Hubbard-like Hamiltonian is used to study exchange-effects in solid 3He when a few 4He atoms are present as impurities. A canonical transformation has been performed to arrive at a Hamiltonian with terms that describe exchange between two 3He atoms, and a 3He atom and a 4He atom. In an attempt to see to what extent the magnetic properties of pure solid 3He remain unaltered, an analog of the L...
متن کاملMagnetic diffraction in solid 3He
2014 Magnetic diffraction in a bcc single crystal of 3He directly proves the occurrence of an antiferromagnetic ordering with a propagation vector ( 1 /2, 0, 0). J. Physique Lett. 46 (1985) L-923 L-927 ler OCTOBRE 1985, Classification Physics Abstracts 67. 80 75 . 25 75. 30E The originality of the magnetic ordering of solid 3 He is that the large zero point motion leads to atom-atom exchange pr...
متن کاملVariation of the exchange frequencies with density in bcc solid 3He
2014 We discuss the interpretation of recent pressure measurements in magnetic field performed by Van Degrift et al. In contrast with the authors, we think that these results are not in contradiction with the susceptibility measurements and give further arguments in favour of the multiple exchange model. We deduce the derivatives of the three and four particle exchange frequencies with respect ...
متن کاملSpin Exchange Optical Pumping of Neon and Its Applications
Hyperpolarized noble gases are used in a variety of applications including medical diagnostic lung imaging, tests of fundamental symmetries, spin filters, atomic gyroscopes, and atomic magnetometers. Typically 3He is utilized because large 3He polarizations on the order of 80% can be achieved. This is accomplished by optically pumping an alkali vapour which polarizes a noble gas nucleus via spi...
متن کاملMultiple-Spin Exchange on a Triangular Lattice: A Quantitative Interpretation of Thermodynamic Properties of Two-Dimensional Solid
We apply exact high-temperature series expansions of the multiple-spin-exchange Hamiltonian for a triangular lattice to describe high precision NMR measurements of the nuclear magnetic susceptibility of 3He films adsorbed on graphite, reported here, as well as all available specific heat data. A consistent quantitative description of the unusual thermodynamic properties of the second layer soli...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2017