Zero field cooled / field cooled susceptibilities

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In summary, the zero field cooled (ZFC) susceptibility is the measurement of a material's magnetic response when it is cooled from a high temperature to a low temperature in the absence of an external magnetic field, while the field cooled (FC) susceptibility is the measurement of the material's magnetic response when it is cooled in the presence of an external magnetic field. Both ZFC and FC susceptibilities are important in studying magnetic materials as they provide information about a material's magnetic properties and can be measured using a SQUID magnetometer. Factors such as composition, structure, and temperature can affect the ZFC and FC susceptibilities, and these measurements have various applications in scientific research for understanding the behavior of magnetic materials.
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sell.eduardo
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I'm studying magnetic properties of nanoparticles in a liquid carrier and trying to understand better zero-field-cooled/field-cooled curves. We use the Stoner–Wohlfarth model and Chantrell calculations to model ZFC/FC curves but I'm having some issues to follow the calculation.

Does anyone understands the model and can help or knows any reference that can help with that?
 
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I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
 

1. What is the difference between zero field cooled and field cooled susceptibilities?

The zero field cooled (ZFC) susceptibility is the measurement of a material's magnetic response when it is cooled from a high temperature to a low temperature in the absence of an external magnetic field. The field cooled (FC) susceptibility, on the other hand, is the measurement of the material's magnetic response when it is cooled in the presence of an external magnetic field.

2. Why are both ZFC and FC susceptibilities important in studying magnetic materials?

Both ZFC and FC susceptibilities provide important information about a material's magnetic properties. The ZFC susceptibility helps to determine the temperature at which a material transitions from a paramagnetic to a ferromagnetic state, while the FC susceptibility can provide insights into the strength of the material's magnetization and its response to external magnetic fields.

3. How are ZFC and FC susceptibilities measured?

ZFC and FC susceptibilities are typically measured using a superconducting quantum interference device (SQUID) magnetometer. The sample is placed in a temperature-controlled environment and cooled to the desired temperature, then an oscillating magnetic field is applied and the resulting response is measured.

4. What factors can affect the ZFC and FC susceptibilities of a material?

The ZFC and FC susceptibilities of a material can be affected by several factors, including the composition and structure of the material, the strength and direction of the external magnetic field, and the temperature at which it is measured. Other factors, such as defects and impurities in the material, can also influence its magnetic properties.

5. What applications do ZFC and FC susceptibilities have in scientific research?

ZFC and FC susceptibilities are commonly used in the study of magnetic materials, including ferromagnets, antiferromagnets, and superconductors. They can provide valuable information about a material's phase transitions, magnetic anisotropy, and critical temperatures, and are essential tools for understanding the behavior of these materials in various applications, such as data storage and energy generation.

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