M. Hirai et al., Compact permanent magnetic circuit with periodic magnetic field designed for studies of liquid crystals, MOLEC CRYST, 367, 2001, pp. 3429-3438
We have developed a high-performance compact magnetic circuit to investigat
e orientational phase behaviors of biological and synthetic macromolecular
systems by using spectroscopic methods such as X-ray scattering and light s
cattering. This magnetic circuit can apply a periodic magnetic field and gr
adient to samples. The maximum values of the magnetic field strength and gr
adient are varied from 1.5 tesla to 0.55 tell, and from 2.4x10(2) tesla/m t
o 7.3x10(1) tesla/m. Owing to the high periodicity of the magnetic field st
rength and gradient macromolecules are subjected to both rotational and tra
nslational forces from the magnetic field. We show some prominent features
of this magnetic circuit and its first application to the synchrotron radia
tion small-angle X-ray scattering (SR-SAXS) studies of supermacromolecular
liquid crystals.