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phase-FMR ferromagnetic resonance measurement system: a revolutionary breakthrough brought about by new technologies

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For researchers studying magnetics, there are many instruments for measuring static magnetism on the market: high-end Quantum Design's famous MPMS3 (SQUID) and more versatile PPMS systems; Vibrating sample magnetometer (VSM); some of the low-end hysteresis loop testers. There are also some auxiliary magnetic measurement methods, such as magneto-optical Kerr effect measurement, magnetic torque measurement, magnetoelastic measurement, etc. It can be said that the means of static magnetic measurement system is very rich. However, static magnetic measurements reflect only the results of macroscopic statistics and do not reflect the results of microscopic magnetic interactions. A well-known dynamic magnetic measurement method is ferromagnetic resonance measurement. However, ferromagnetic resonance measurement involves high-frequency signal transmission and complex data analysis. It usually needs to be built with expensive vector network analyzers. It is a very difficult task for most researchers, and the signal-to-noise ratio is difficult to achieve. High level.

The phase-FMR ferromagnetic resonance measurement system of NanoOSC of Sweden adopts two special technologies, which greatly reduces the measurement signal-to-noise ratio and greatly reduces the technical requirements of the measurement personnel.

First of all, phase-FMR uses Helmholtz coil and lock-in amplifier technology, which greatly improves the accuracy of AC signal measurement. The figure below shows the measurement principle of the system.

Changchun Yingpu Magnetoelectric Technology Development Co., Ltd.

  

 

Second, the phase-FMR uses a more easily operated CPW coplanar waveguide plate as a transmission component for high frequency signals. This makes the measurement frequency range wider and is no longer limited to a few special frequency points like the resonant cavity. Measurements can be made at any frequency in the range of 2-40 GHz.

  

By obtaining the resonance linewidth at different frequencies by ferromagnetic resonance measurement, the relevant dynamic magnetic parameters of the sample can also be fitted, mainly: effective magnetic moment: Meff, gyromagnetic ratio: γ, damping coefficient: α, non Uniform broadening: ΔHo. Information on the saturation magnetization Ms can also be obtained.

Measurement example:

1. The original measurement curve of ferromagnetic resonance of 1.5 nm CFO film and the data analysis curve of the measurement software. Even with the high-precision MPMS system, 1.5-nanometer films have been difficult to measure. Phase-FMR still achieves a good measurement curve.

 

2. Effect of annealing on the magnetic properties of the sample

  

 

3. PSSW and FMR effects of magnetic films

  

For researchers studying magnetics, there are many instruments for measuring static magnetism on the market: high-end Quantum Design's famous MPMS3 (SQUID) and more versatile PPMS systems; Vibrating sample magnetometer (VSM); some of the low-end hysteresis loop testers. There are also some auxiliary magnetic measurement methods, such as magneto-optical Kerr effect measurement, magnetic torque measurement, magnetoelastic measurement, etc. It can be said that the means of static magnetic measurement system is very rich. However, static magnetic measurements reflect only the results of macroscopic statistics and do not reflect the results of microscopic magnetic interactions. A well-known dynamic magnetic measurement method is ferromagnetic resonance measurement. However, ferromagnetic resonance measurement involves high-frequency signal transmission and complex data analysis. It usually needs to be built with expensive vector network analyzers. It is a very difficult task for most researchers, and the signal-to-noise ratio is difficult to achieve. High level.
 
The phase-FMR ferromagnetic resonance measurement system of NanoOSC of Sweden adopts two special technologies, which greatly reduces the measurement signal-to-noise ratio and greatly reduces the technical requirements of the measurement personnel.
 
First of all, phase-FMR uses Helmholtz coil and lock-in amplifier technology, which greatly improves the accuracy of AC signal measurement. The figure below shows the measurement principle of the system.

  

 

Second, the phase-FMR uses a more easily operated CPW coplanar waveguide plate as a transmission component for high frequency signals. This makes the measurement frequency range wider and is no longer limited to a few special frequency points like the resonant cavity. Measurements can be made at any frequency in the range of 2-40 GHz.

  

 

By obtaining the resonance linewidth at different frequencies by ferromagnetic resonance measurement, the relevant dynamic magnetic parameters of the sample can also be fitted, mainly: effective magnetic moment: Meff, gyromagnetic ratio: γ, damping coefficient: α, non Uniform broadening: ΔHo. Information on the saturation magnetization Ms can also be obtained.
 
Measurement example:
 
1. The original measurement curve of ferromagnetic resonance of 1.5 nm CFO film and the data analysis curve of the measurement software. Even with the high-precision MPMS system, 1.5-nanometer films have been difficult to measure. Phase-FMR still achieves a good measurement curve.

  

 

2. Effect of annealing on the magnetic properties of the sample

  

 

3. PSSW and FMR effects of magnetic films

  

 

For researchers studying magnetics, there are many instruments for measuring static magnetism on the market: high-end Quantum Design's famous MPMS3 (SQUID) and more versatile PPMS systems; Vibrating sample magnetometer (VSM); some of the low-end hysteresis loop testers. There are also some auxiliary magnetic measurement methods, such as magneto-optical Kerr effect measurement, magnetic torque measurement, magnetoelastic measurement, etc. It can be said that the means of static magnetic measurement system is very rich. However, static magnetic measurements reflect only the results of macroscopic statistics and do not reflect the results of microscopic magnetic interactions. A well-known dynamic magnetic measurement method is ferromagnetic resonance measurement. However, ferromagnetic resonance measurement involves high-frequency signal transmission and complex data analysis. It usually needs to be built with expensive vector network analyzers. It is a very difficult task for most researchers, and the signal-to-noise ratio is difficult to achieve. High level.

The phase-FMR ferromagnetic resonance measurement system of NanoOSC of Sweden adopts two special technologies, which greatly reduces the measurement signal-to-noise ratio and greatly reduces the technical requirements of the measurement personnel.

First of all, phase-FMR uses Helmholtz coil and lock-in amplifier technology, which greatly improves the accuracy of AC signal measurement. The figure below shows the measurement principle of the system.

 

Second, the phase-FMR uses a more easily operated CPW coplanar waveguide plate as a transmission component for high frequency signals. This makes the measurement frequency range wider and is no longer limited to a few special frequency points like the resonant cavity. Measurements can be made at any frequency in the range of 2-40 GHz.

  

By obtaining the resonance linewidth at different frequencies by ferromagnetic resonance measurement, the relevant dynamic magnetic parameters of the sample can also be fitted, mainly: effective magnetic moment: Meff, gyromagnetic ratio: γ, damping coefficient: α, non Uniform broadening: ΔHo. Information on the saturation magnetization Ms can also be obtained.
 
Measurement example:
 
1. The original measurement curve of ferromagnetic resonance of 1.5 nm CFO film and the data analysis curve of the measurement software. Even with the high-precision MPMS system, 1.5-nanometer films have been difficult to measure. Phase-FMR still achieves a good measurement curve.
 

 

2. Effect of annealing on the magnetic properties of the sample

  

 

3. PSSW and FMR effects of magnetic films