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attoMFM I
attoMFM I
low temperature magnetic force microscope, cantilever based
The attoMFM I is a compact magnetic force microscope designed particularly for applications at low and ultra low temperatures. Based on
the attoAFM I, the instrument works by scanning the sample below a
fixed magnetic cantilever. The magnetic force gradient acting on the
tip is then determined by measuring the change in resonance frequency
(FM mode) or phase of the cantilever (PM mode) with highest precision
using a fiber-based optical interferometer.
Both measurement techniques are applied at a specific tip-sample
distance, typically around 10 - 100 nm. In FM mode, a phase-locked
loop (PLL) is used to excite the cantilever at resonance. The attoMFM I
is available with an optional interferometric encoder for closed loop
operation.
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6
11
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1
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2
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9
01 LT and HV compatible feedthroughs
02 vacuum window
3
03 microscope insert including single mode fiber
04 superconducting magnet (optional)
5
05 attoDRY1100 cryostat (optional)
4
06 quick exchange sample holder
07 xyz scanner
08 xyz coarse positioners
09 ultra stable Titanium housing
Schematic drawing of the low temperature attoMFM I
and the attoDRY1100 cryostat (optional)
10 single mode fiber for interferometric deflection detection
11 alignment free cantilever holder