Multi functional high-resolution magneto-optical Kerr microscopy imaging system

he multifunctional high-resolution magneto-optical Kerr microscopy imaging system produced by the company is manufactured based on independently designed optical path structures and Olympus and Solebo optoelectronic components, suitable for magnetic domain imaging and dynamic research of magnetic materials/spintronic devices.
★ Multi functional probe station, capable of providing in-plane, vertical magnetic fields, and multiple pairs of DC/high-frequency probes - combined with magneto-optical imaging and spin transport testing!
★ Large 1.8T vertical magnetic field, 1T in-plane magnetic field, 4K-800K temperature variation, can be used for imaging research of hard magnetic materials.
Multifunctional control system
Test signal control
-Multiple signals such as vertical/in-plane magnetic field/current/microwave μ S-level synchronous application;
-The waveform, amplitude, frequency, relative delay and other parameters of each signal can be easily adjusted.
image processing
-Real time subtraction to eliminate background noise;
-Automatically correct vibration drift, etc.
Signal analysis
-Real time display of current and magnetic field test signals;
-Based on Kerr image analysis, perform hysteresis loop scanning on the sample locally (300 nm) or globally.
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Magnetic field probe station
In-plane magnetic field
★ Large 1 T, reaction speed 50 ms, accuracy 0.1 mT.
Three vertical magnets can switch freely
★ Magnetic field 1: Large 1.8 T, reaction speed 50 ms, accuracy 0.1 mT;
★ Magnetic field 2: Large 30 mT, reaction speed 50 μ s. Accuracy of 0.01 mT;
★ Magnetic field 3: Greater than 50 mT, reaction speed 1 μ s. Accuracy of 0.01 mT;
★ Multiple DC/high-frequency probes can be configured, with any waveform signal source of 10 V and 20 MHz.
Imaging effect
★ Kerr imaging resolution of 300 nm (100x objective);
★ Large field of view: 1.2 mm x 1 mm (5x objective);
★ Can detect magnetic changes in two atomic layer thin films.
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Labyrinth domains in CoFeB (1.3 nm)/W (0.2)/CoFeB (0.5) thin films
image processing
★ Using any image as the background, perform real-time noise subtraction;
★ Image drift correction, automatic addition of scale bar and other functions.
In CoFeB (20 nm) thin films,
[In plane magnetic field 20mT] drives magnetic domain flipping
Magnetic Flipping Driven by SOT in CoTb Ferromagnetic Microwires
CoFeB/W/CoFeB
Micron sized magnetic bubbles in thin films
In a Ta/CoFeB/MgO line with a width of 200 nm,
[120 mT, 5 μ s] Magnetic field pulse drives domain wall movement
Other functions
★ Analyze global or local (300 nm) Kerr images to obtain hysteresis loops;
The horizontal axis of the hysteresis loop can be any excitation signal such as in-plane, vertical magnetic field, or current;
★ configurable temperature control system: 4K-800K temperature adjustable;
★ Paired with ST-FMR, second harmonic testing systems and software;
★ Various interfaces are reserved and can be independently modified according to experimental needs.