Investigation of magnetic properties of solids in ultrahigh pulsed magnetic fields

Abstract

The developed techniques of up to 1000 T pulsed magnetic fields production in a volume of several cm 3 as well as of obtaining low sample temperatures made it possible to carry out a series of studies of fundamental properties of substances in such fields. A characteristic feature of these studies is that the energy of the magnetic ion in ∼ 1000 T fields is comparable to or more than the energies of exchange and spin—orbital interactions, the energy of the crystalline field and is in excess of the thermal energy at room temperature. This allowed to reveal some interesting phenomena such as magnetization with magnetic fields of light waves, semiconductor—metal phase transition into a non-collinear phase, cyclotron and electron paramagnetic resonances at optical frequencies, brightening of an opaque sample, concurrence of circular and linear birefringence in an antiferromagnet, Ising ferrimagnetic magnetization jumps at 77 K, etc. Using ultrahigh magnetic fields for HTSC investigation allowed to measure the magnitudes of the upper critical fields and the de Haas—van Alphen frequencies. The new effects are observed in broadband dielectrics under isentropic compression by ultrahigh magnetic fields.