9 research outputs found
Measuring Pancharatnam's relative phase for SO(3) evolutions using spin polarimetry
In polarimetry, a superposition of internal quantal states is exposed to a
single Hamiltonian and information about the evolution of the quantal states is
inferred from projection measurements on the final superposition. In this
framework, we here extend the polarimetric test of Pancharatnam's relative
phase for spin proposed by Wagh and Rakhecha [Phys. Lett. A {\bf 197},
112 (1995)] to spin undergoing noncyclic SO(3) evolution. We
demonstrate that the output intensity for higher spin values is a polynomial
function of the corresponding spin intensity. We further propose a
general method to extract the noncyclic SO(3) phase and visibility by rigid
translation of two spin flippers. Polarimetry on higher spin states
may in practice be done with spin polarized atomic beams.Comment: New title, minor corrections, journal reference adde
Exchange Bias and Its Phase Reversal in Zero Magnetization Admixed Rare-Earth Intermetallics
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Magnetic compensation by Nd doping in SmScSi
The Sm intermetallic compound SmScSi, a ferromagnet with an unusually high Tc of 270 K, has been driven into a 'zero magnetization'state by substituting 9 at.% of Sm by Nd. The magnetic characteristics have been studied by dc magnetization, ac susceptibility and specific heat measurements and comparisons are made with the Gd doped SmAl2 systems