Soft Magnetic Coating - Magnetic force microscopy - Reflex coating
NanoWorld Pointprobe® S-MFMR AFM probes are designed for the measurement of magnetic domains in soft magnetic samples. Due to the low coercivity of the soft magnetic tip coating the magnetisation of the tip will easily get reoriented by hard magnetic samples.
All probes of the Pointprobe® series are made from monolithic silicon which is highly doped to dissipate static charge. The tip is shaped like a polygon based pyramid with a height of 10-15 µm.
Additionally this probe offers unique features:
soft magnetic coating on the tip side (coercivity of app. 0.75 Oe, remanence magnetization of app. 225 emu/cm3)
effective magnetic moment 0.75x of standard probes
tip radius of curvature of the coated tip < 30 nm
magnetic resolution better than 35 nm
The reflex coating on the detector side of the cantilever enhances its reflectance and prevents light from interfering within the cantilever.
Cantilever Data
Value
Range*
Thickness
3.0 µm
2.5 - 3.5
Mean Width
28 µm
22.5 - 32.5
Length
225 µm
220 - 230
Force Constant
2.8 N/m
1.2 - 5.5
Resonance Frequency
75 kHz
60 - 90
Order Code
Quantity
Data Sheet
S-MFMR-Sample
2
yes
S-MFMR-10
10
yes
S-MFMR-20
20
no
S-MFMR-50
50
yes
*Typical values
Soft Magnetic Coating
The S-MFMR is coated with a soft magnetic thin film. This soft magnetic coating on the tip has a coercivity of app. 0.75 Oe and a remanence magnetization of app. 225 emu/cm3 (these values were determined on a flat surface). For enhanced signal strength the magnetization of the tip by means of a strong permanent magnet prior to the measurement is recommended.
Reflex Coating
Reflex coating is an approximately 30 nm thick aluminum coating on the detector side of the cantilever which enhances the reflectance of the laser beam by a factor of 2.5. Furthermore it prevents light from interfering within the cantilever. As the coating is almost stress free the bending of the cantilever due to stress is less than 2°.
