Cryogenic High-Magnetic-Field Laser Kerr Microscope

Classification

Keywords

Product Model:

KMP-L

Product Introduction:

The Cryogenic High-Magnetic-Field Laser Kerr Microscope enables high-resolution magnetic domain imaging of samples under high magnetic fields (>1 T) and variable temperature conditions (4.2 K to 420 K). Simultaneously, by introducing and focusing a laser onto the sample surface and modulating/demodulating the laser signal, it can detect weak magnetic variations in micro-areas as small as 2 micrometers. This system is ideal for characterizing materials with properties such as weak magnetism, small dimensions, low conductivity,high coercive fields, or low Curie temperatures. It achieves precise laser spot positioning on the sample surface, localized hysteresis loop scanning in micro-regions, and characterization of transport properties under extreme conditions, making it particularly suitable for studying two-dimensional ferromagnetic materials.

Optical Resolution	450 nm
Objectives	5 x, 20 x, 50 x, 100 x, non-magnetic
Kerr Angle Resolution	0.5 mdeg (RMS)
Laser Spot	5 μm
In-Plane Magnetic Field	Water-cooled magnet, 1 T@air gap 18 mm at room temperature; 0.75 T@air gap 28 mm at lowtemperature
Vertical Magnetic Field	Water-cooled magnet, 1.6 T@air gap 10.5 mm at room temperature; 1 T@air gap 24 mm at low temperature
Magnetic Field Resolution	PID closed-loop feedback regulation, resolution 0.05 mT
Variable Temperature Range	4.2K-420K
Temperature Stability	土50mK
Electrical Source Meter	Stanford SR830, Keithley 6221, Keithley 2182 A
Testing Functions	Under ambient and low-temperature conditions, it can perform magnetic domain dynamic observation, laser quantitative micro-region hysteresis loop scanning, electrical transport testing, and second harmonic testing.
Expansion	Can be expanded with coupled pump light, Raman, and other light sources.