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..