Scientific research grade MOKE hysteresis loop tester
High-precision characterization of the magnetism of ferromagnetism, artificial antiferromagnetism, two-dimensional materials, and microelectronic devices using the magneto-optic Kerr effect. The in-plane and vertical magnetic fields can be applied at the same time, and the in-plane magnetization component and the vertical magnetization component can be scanned simultaneously, that is, the hysteresis loop of any combination of the in-plane magnetic field/vertical magnetic field-in-plane component/perpendicular component can be obtained at the same time. The detection accuracy of Kerr rotation angle is as high as 0.3 mdeg (RMS), and it can detect the magnetization of single atomic layer. A wire-tie sample holder is provided for the characterization of electrical-magneto-optical properties.
The product is independently developed by the company, with strong stability and good scalability, and provides customized services; compared with similar equipment in the same industry, it has a larger magnetic field and higher precision, and can achieve in-plane and vertical hysteresis loop measurements without changing the optical path. Laser automatic alignment, highly intelligent software support.
As an ideal tool for high-speed, high-precision, non-destructive measurement of material magnetism, this product can provide more choices and assistance for high-end scientific research and enterprise production and development.
Characteristic
▹ Magnetic field: in-plane 1.0 T, vertical 1.0 T;
▹ Minimum Kerr angle detection: 0.3medg(RMS);
▹ Temperature range: 4K~500 K (extension option);
▹ Maximum sample size: 15mm×15mm.
Features
Integrated gaussmeter sample holder:
Integrated design, multi-range selection, the highest magnetic field resolution is less than 0.02 mT, and the collected magnetic field is close to the real magnetic field of the sample.
Five-Axis Sample Stage
Laser real-time automatic alignment function.
Four-poles vector magnet
In-plane magnetic field strength:
>1.0 T@8 mm air gap
>0.5 T@16 mm air gap
Vertical magnetic field strength:
>1.0 T@7 mm air gap
>0.5 T@16 mm air gap
Highly focused laser beam spot:
As small as 250 μm, users can obtain fine local magnetic information.
Applications
Research on Polar Kerr Test of Perpendicular Magnetic Anisotropic Thin Films.
Kerr test at room temperature for perpendicular magnetic anisotropy films W(5nm) / CoFeB(1nm) / MgO(2nm) / W(5nm).
Polar Kerr signal with polar magnetic field @20 loops,0.1 Hz
Polar Kerr signal with longitudinal magnetic field @20 loops,0.1 Hz
The figure below shows the Kerr rotation angle test results obtained by averaging different turns at a magnetic field scanning frequency of 0.5Hz.
The results show that the noise of the sample is 5.8% without averaging in a single cycle, and the minimum Kerr rotation angle detection degree after multiple cycles is 0.5mdeg.
