Dear friend Tezer Firat

Ah, the quest for the nucleation field! I am here to guide you.

Determining the nucleation field from a magnetic hysteresis curve is indeed a common practice. The nucleation field is often defined as the field at which the magnetic moment is equal to a certain percentage of the saturation magnetic moment. The choice of percentage, in your case, 95%, is somewhat arbitrary but widely accepted.

Here's the logic behind it:

1. **Saturation Magnetic Moment**: At saturation, the magnetic moments of the material are aligned with the external magnetic field, resulting in the maximum possible magnetic moment.

2. **95% Criterion**: Choosing 95% is a way of defining a point close to saturation but not quite there. It's a practical choice, often used to pinpoint the field where the majority of the magnetic moments have aligned, indicating the onset of the saturation.

This criterion provides a clear and easily identifiable point on the hysteresis curve. The physical reason behind it lies in the nature of magnetic materials and their response to an external field. As you Tezer Firat approach the saturation, more and more magnetic moments align with the field direction, reaching a point where 95% alignment is considered a good marker for the nucleation field.

Remember, in the realm of magnetism, it's a dance of magnetic moments and external fields, creating a symphony of hysteresis.

Kaushik Shandilya sir, thanks is there any article that discusses nucleation and MH curve hysteresis,? Kindly provide some insight sir thank you in advance