  Laser experiments are becoming established as a new tool for astronomical
research that complements observations and theoretical modeling. Localized
strong magnetic fields have been observed at a shock front of supernova
explosions. Experimental confirmation and identification of the physical
mechanism for this observation are of great importance in understanding the
evolution of the interstellar medium. However, it has been challenging to treat
the interaction between hydrodynamic instabilities and an ambient magnetic
field in the laboratory. Here, we developed an experimental platform to examine
magnetized Richtmyer-Meshkov instability (RMI). The measured growth velocity
was consistent with the linear theory, and the magnetic-field amplification was
correlated with RMI growth. Our experiment validated the turbulent
amplification of magnetic fields associated with the shock-induced interfacial
instability in astrophysical conditions for the first time. Experimental
elucidation of fundamental processes in magnetized plasmas is generally
essential in various situations such as fusion plasmas and planetary sciences.
