2016 Volume 33 Issue 3 Pages 330307-
Efficiency of observing translation and rotation of a sub-millimeter size sample at low magnetic field has considerably increased by improving the system to release small samples in microgravity (μG) area of reduced pressure. By measuring the period of rotational oscillation induced in a homogeneous field of 0.2T, anisotropy of paramagnetic susceptibility ΔχPARA was detected on a small paramagnetic crystal. By observing velocity vR of a translating grain at a position of B ~ 0, diamagnetic susceptibility χDIA is detected in a small grain. Here the position of sample stage was controlled for the purpose of releasing the samples in a μG area with small momentum. The obtained techniques to observe fieldinduced motions of sub-mm sized samples are a step forward to detect magnetization of a weakly magnetic particle of μm size.
