Zobrazeno 1 - 10
of 143
pro vyhledávání: '"J. H. Van Vleck"'
Publikováno v:
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences. 344:21-50
A successful theory of the width of the ferromagnetic resonance line of Eu iron garnet must explain its variation with temperature, operating frequency and direction. It is found that this goal can be achieved by using the so-called ‘ longitudinal
Autor:
J. H. Van Vleck, M. E. Foglio
Publikováno v:
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences. 336:115-140
The magnetic anisotropy of europium iron garnet is caused by the combined effect of the crystalline field and anisotropic exchange, of which the latter proves to be the more important. Most of the parameters required for the analysis are derived in
Autor:
J. H. Van Vleck
Publikováno v:
Reviews of Modern Physics. 50:181-189
The existence of magnetic materials has been known almost since prehistoric times, but only in the 20th century has it been understood how and why the magnetic susceptibility is influenced by chemical composition or crystallographic structure. In the
Autor:
J. H. Van Vleck
Publikováno v:
The Journal of Physical Chemistry. 84:2091-2095
Autor:
D. L. Huber, J. H. Van Vleck
Publikováno v:
Reviews of Modern Physics. 49:939-959
The development of the theory of the interaction of electromagnetic radiation with atoms and molecules is outlined. A fully classical analysis of absorption and emission is formulated in which particular attention is paid to questions of detailed bal
Autor:
J. H. Van Vleck, Richard M. Bozorth
Publikováno v:
Physical Review. 118:1493-1498
The susceptibility of europium is measured from 1.3 to 300\ifmmode^\circ\else\textdegree\fi{}K in fields up to 12 000 oersteds. This metal is found not to be ferromagnetic, but to have at low temperatures a very high paramagnetic susceptibility, abou
Autor:
J. H. Van Vleck
Publikováno v:
The Journal of Chemical Physics. 9:85-90
Autor:
J. H. Van Vleck
Publikováno v:
The Journal of Chemical Physics. 5:320-337
The mutual magnetic potential energy of atomic magnetic dipoles is unimportant in salts of high dilution at ordinary temperatures, but becomes important in determining the temperature scale in the new very low region obtained by magnetic cooling. Thi
Autor:
J. H. Van Vleck
Publikováno v:
Physical Review. 74:1168-1183
In regular crystals, the width of the absorption lines arising from the magnetic moment of the electron or nucleus is caused primarily by the interaction between the magnetic dipoles. It is prohibitively difficult to determine the precise shape of th
Autor:
K. Kambe, J. H. Van Vleck
Publikováno v:
Physical Review. 96:66-71
The previous calculations of Abragam and Van Vleck on the $g$ factors of the $2{p}^{4}^{3}P$ terms of atomic oxygen are refined by including exchange, using better wave functions, and not assuming that the charge distribution in which a $2p$ electron