Product overview

Magneto-Optic Kerr Effect Microscopy System is a facility for the visualisation of magnetic domains and magnetization processes as well as for optically recording magnetization curves on all kinds of magnetic materials, including bulk specimens like sheets or ribbons, magnetic films and multilayers, patterned films or micro- and nanowires. They are highly automated, contact-less, non-destructive measuring systems using the magneto-optical Kerr effect (MOKE) as contrast mechanism. Automatic off-axial light system allows for automatic and simultaneous visualization of all the components of magnetization vector. The microscope is equipped with a rotable in-plane magnet with maximum field of 1.0 T @ 1 cm gap (0.36 T @ 4 cm gap for cryostat) (with cooling capability), or a perpendicular (out-of-plane) magnet with maximum field of 1.4 T @ 1 cm gap (0.7 T @ 2.3 cm gap for cryostat).

Advantages

The integrated Kerr microscope test platform has an ability to track the real time magnetic information with millions of data point acquisition. The spatial resolution of the magnetic domain is better than 0.5μm, and the angular resolution of the, magneto-optical Kerr is better than 0.0001 deg. The standard system provides external magnetic field and bias current, which is a powerful technical method for spintronics research.

Main components

Intelligent Lighting System

Stable and uniform light source
Capable of polar, longitudinal and transverse testing
High brightness (4 times that of market products)

Multifunctional Microscopic System

Linear polarized light and circular polarized light
Improve phase difference distortion correction
Motorized microscopic focusing

Vector Magnetic Field System

PMA: Maximum magnetic field 1.4 T @ 0.5 cm pole gap
IMA: 1.0 T @ 1 cm pole gap, 0.36 T @ 4 cm pole gap (compatible with cryostat), the maximum vector field system can reach 0.35 T
Out-of-plane magnetic field and in-plane magnetic field can be switched quickly

High-end Camera

Ultra-dynamic range 30000: 1 (tenfold improvement)
High quantum efficiency >80% (1.2-fold improvement)
High-speed imaging and high resolution

DC/AC Probe

Matched with external meters (6221, 2400, etc.)
Compatible with high-frequency meters
Compatible with wire bonding devices

High-end Optical Platform

Air-floating vibration isolation
Electronic active feedback vibration isolation

Parameters

Instrument body	Active antivibration platform with air compressors
Optical main body	Microscope main body, High resolution auto analyzing module, High resolution motorized focus module, None-magnetic, ultra-long working distance objective lens.
Light source	Smart lighting system with tunable radiation angle (resolution Support arbitrary radiation pattern with programmable light int 2degree, @ 50 X, NA 0.55). ensity for each R, G, B light source.
Magnetic field	Perpendicular magnetic field: Maximum 1.4 T@1 cm gap; Maximum 0.7 T @2.3 cm gap for cryostat; In-plane magnetic field: Maximum 1.0 T@1cm gap; Maximum 1.4 T@0.5 cm gap; Maximum 0.36 T@4 cm gap for cryostat. Non-uniformity of the magnetic field under the field of view of the objective lens is less than 2% Air cooling Magnetic field read resolution:0.01 mT
Variable temperature	77 K ‒ 450 K with liquid nitrogen 4.2 K ‒ 450 K with liquid helium 10 K ‒ 450 K with closed-cycle cooling system
Sample holder	XYZ actuators for perpendicular/in-plane magnetic field system Accuracy 3 μm with 10 μm readable
Probe station	DC, high frequency probe (configured according to user's requirement)
Electric transport instruments	Compatible with spin measurement equipment such as Keithley 6221& 2182A, lock-in amplifiers, etc. (configured according to customer requirements).
Device software	The device software integrates various variable controls, including optical control, magneticfield control, gate voltage control, pulse current control, temperature control, etc.

FAQ

1. What is the core application of the Magneto-Optic Kerr Effect Microscopy System?

It is used for the visualization of magnetic domains and magnetization processes of various magnetic materials, as well as the optical recording of magnetization curves. It is compatible with multiple types of materials, including bulk specimens (such as sheets or ribbons), magnetic films, multilayers, patterned films, and micro- and nanowires.

2. What are the key advantages of the equipment?

Real-time tracking of magnetic information with acquisition of millions of data points.
Spatial resolution of magnetic domains better than 0.5μm and magneto-optical Kerr angular resolution better than 0.0001 deg.
Supports non-contact, non-destructive measurement with a high degree of automation.

3. What is the range of magnetic field parameters provided?

Perpendicular magnetic field: Maximum 1.4 T @ 1 cm gap; maximum 0.7 T @ 2.3 cm gap for cryostat.
In-plane magnetic field: Maximum 1.0 T @ 1 cm gap; maximum 0.36 T @ 4 cm gap for cryostat.
The non-uniformity of the magnetic field under the field of view of the objective lens is less than 2%, and the magnetic field read resolution is 0.01 mT.

4. What is the temperature control range?

77 K ‒ 450 K with liquid nitrogen cooling.
4.2 K ‒ 450 K with liquid helium cooling.
10 K ‒ 450 K with closed-cycle cooling system.
5. Has the equipment obtained relevant certifications?
It has obtained three system certifications, namely ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and ISO 45001 (Occupational Health and Safety Management).

Certifications

Our company's optical equipment (including optical processing equipment and optical inspection equipment) has successfully obtained ISO certification.