How to be defined the thermodynamic magnetic field Hc from curve M(H).

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Ger Koper

Dear Youssef Ait Ahmed,

I need some further information before I can try to answer this question.

Is this the magnetic induction B as a function of applied magnetic field H or did you subtract the applied magnetic field already to obtain the magnetization.

Do you mean by Hc the coercivity? See https://en.wikipedia.org/wiki/Coercivity for an explanation.

Looking forward to your answer.

Youssef Ait Ahmed

Dear Sir Ger Koper,

I want to thank you sir for your answer, this curve show the M (H) in the superconductor compound ( diamagnetic ). Hc is the thermodynamic magnetic field.

Dear Youssef Ait Ahmed

My response consisted of 2 questions, it was not an answer. I repeat with 2 questions.

How did you obtain the above curve as a magnetometer can only measure the magnetic induction and not the magnetization itself. Your instrument may do tricks to the data that I need to know first.

The second question is also not answered. Can you give me a reference where the term "thermodynamic magnetic field" is introduced. I am not familiar to this concept.

Looking forward to your answers,

Dear Sir Ger Koper,I want to thank you again.

1)The measured of the M (H) was obtained by using a commercial conducting quantum interference device (SQUID).

2)reference:Article

I would thank you with the best regards.