Small temperature dependence in diamagnetic material

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  • Thread starter jormi
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Hi everybody!
I´m chemist doing new materials and my understanding of physics is quite basic.
I have a sample (single phase) of Ba and Ge and it shows diamagnetism in the magnetic susceptibility measurement, however it show a small temperature dependent behavior. As far as I understand, diamagnetic materials should be nearly T independent so I don´t understand well what is going on here. According to heat capacity, there is no such effect in that temperature range, so I can discard a phase transition.
Any suggestion?

The measurement is at high magnetic field. At low magnetic field or in absent of it, the sample becomes superconductor at 7 K.
The increase at low T is due to paramagnetic impurities. In the range 100 - 200 K it increases by a factor of two and then saturates and remains constant, as should be.

PS I´m not allowed to post original data so I made a figure by hand..
figure.png
 

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Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 

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