The cascade magnetocumulative generator of ultrahigh magnetic fields — A reliable tool for megagauss physics

Phase transitions in megagauss magnetic fields

“…Magnetization measurements in Mn 12 Ac were conducted in pulsed magnetic fields up to 750 T produced by a magnetocumulative generator MC-1. The experimental procedure is described in [13]. The results of these experiments show that a change from the ferrimagnetic to the ferromagnetic state begins in fields of about 400 T and ends in fields of about 750 T. At low temperatures ($ 2 ± 4 K), this magnetization process is quantum in character, that is, much the same as presented in Fig.…”

“…The Faraday effect in KMnF 3 was measured at 79 K in pulsed magnetic fields up to 400 T produced by a magnetocumulative generator (see, for example, [13]). A cylindrical sample of KMnF 3 2.4 mm in diameter and 3.6 mm in thickness, cut along the c axis, was placed in a nitrogen cryostat.…”

Physical Techniques for the Investigation of Molecular Magnetic Clusters

“…Recently extremely high fields have become available through a technique that generates fields up to 800 T. The sample, that can be a polycrystalline powder or an oriented single crystal, is placed in one of two inductive coils with the diameter of 1.6 mm and the length of 8 mm. The coils are accurately checked for ensuring that only the sample magnetization voltage is present, and the sample cooled to the desired temperature using a plastic cryostat.…”

Quantum size effects in molecular magnets

“…The application of a strong external field may give rise to stepped variations in the magnetization also in ferrimagnets. Recently, a technique generating ultra-high magnetic fields up to 850 T by explosive compression of initial magnetic flux was implemented (Bykov et al 1996). It was found that bulk ferrimagnets undergo a second-order (continuous) phase transition from the ferrimagnetic to a canted phase and then from the canted to ferromagnetic states (Zvezdin 1995).…”