Abstract
The experimentally observed ferromagnetism in MgB2 in the normal state is attributed to microphase-separated inclusions of iron. This magnetic character is also observed when the iron content of the samples is reduced below 20 μg/g, however in these samples the diamagnetism of MgB2 is apparent and is measured. It is found experimentally that the diamagnetic susceptibility at room temperature of B element, MgB2, and MgB 4 is close to the ratio 1:2:4, suggesting that the diamagnetism in these borides is confined to the boron atoms. This observation supports a picture in which the two electrons of Mg are donated to B in MgB2.
Original language | English |
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Pages (from-to) | 109-111 |
Number of pages | 3 |
Journal | Journal of Superconductivity and Novel Magnetism |
Volume | 15 |
Issue number | 2 |
State | Published - 2002 |
Keywords
- Iron impurity
- Magnesium diboride
- Normal state