JEOL JSPM-5200 Instructions Manual page 115

５ MEASUREMENT OPERATION
■ Observation
Click on the Scan button in the SKPM tab window.
The topographical image is displayed on the
potential image is displayed on the right side.
Set Clock/ms to 3.3333 ms or more and set Filter/Hz to 0.1 Hz. If the sample is
comparatively flat, set its Loop Gain to 2. If the sample is uneven, set its Loop Gain
to 8. If the to ographical image does not become stable (the tip catches), increase
the Clock setting. If that does not help improve the situation, increase the L
To increase the Loop Gain, first click on the Retract On button to re
cantilever from the sample, then change the Gain. After changing Reference in the
SKPM tab window to minus, click on Retract Off and change Reference to plus.
Then perform the approach slowly.
The higher the modulation frequency of
specimen and the cantilever, the higher the resolving power. So you must keep in
mind the fact that the excitation frequency is set so as not to exceed the
characteristic frequency of the cantilever.
The
sample (the vertical axis value relating to the surface potential image profile).
5-52
p
captured surface potential image directly shows the s
left side of the screen, and the surface
Surface
Topography
potential
image
image
the bias voltage applied across the
oop Gain.
tract the
urface potential of the
TMPM5200-2