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  MFM_HC

High Coercitivity Magnetic probes MFM_HC series

MFM_HC/15 (15 separated chips), 775,00 €
MFM_HC/50 (50 separated chips), 2490,00 €

Magnetic measurement in high external magnetic fields demands corresponding coercitivity value of MFM tip and stability of its magnetization distribution during imaging. Obviously, applying magnetic field higher than coercitivity leads to unavoidable magnetization reversal of magnetic tip and corresponding distortion of magnetic image.

Typical magnetic tips with CoCr coating usually demonstrate coercivity about 200Oe in vertical Z direction (see figure) and 800Oe in horizontal X or Y direction.

Novel magnetic tips based on Co high coercivity alloy (MFM_HC) posses essentially higher values – 500-800Oe in vertical direction and more than 2kOe in horizontal direction. Therefore new MFM_HC tips open new possibilities in magnetic measurements in high external magnetic fields.

MFM_HC series specification

Material

Highly doped Si

Chip size

3.4x1.6x0.3mm

Reflective side coating

Al

Tip side coating

Co-based high coercitivity alloy with additional layers protecting from oxidation

Cantilever number

1 rectangular

Tip curvature radius

typical 40 nm

Coating thickness

50 nm

Guaranteed cantilever lifetime is 1 year if it’s storaged at the normal conditions (humidity 30-40%).

Before the first use prior magnetization of the tip along its axis (Z direction) in a strong magnet (more than 1kOe) is recommended. It helps to improve magnetic signal in 1,5 times. Coercivity of the probes remains the same.

 
Cantilever series
Cantilever length, L±10 µm
Cantilever width, W±5 µm
Cantilever thickness,
T±0.5 µm
Resonant frequency, kHz
Force constant, N/m
min
typical
max
min
typical
max
MFM_HC
225
32
2.5
47
70
90
1
3
5

 *At customer request we can make probes with different coating thickness to achieve different magnetic moments which will be the best for measuring of your samples.

 
 
 
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