On July 21, 2026, Mikhail Ivanovich Petrov, a senior researcher at the Laboratory of High Magnetic Fields, Kirensky Institute of Physics, passed away. Petrov was a pioneer and organizer of experimental research of high-temperature superconductivity at the institute. This article briefly describes his scientific career and cites several of his works on superconducting composites, porous superconductors, large-grain superconductors, and doping of superconducting materials.