PHYSICS OF RARE-EARTHS.The magnetism of praseodymium
نویسنده
چکیده
The hexagonal and cubic ions of dhcp Pr constitute two non-magnetic singlet-ground-state systems, which are coupled only weakly. However, the two-ion coupling between the hexagonal ions is just below the critical value at which an antiferromagnetic ordered phase becomes energetically favoured at low temperatures. This makes the system very sensitive to external influences (magnetic field, uniaxial pressure, impurities), and experimental studies of the ground state properties and of the excitation spectrum under various conditions have led to a very detailed understanding of the magnetic properties of the hexagonal ions.
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