When was the  Soviet, Russian and American theoretical physicist died who describe the magnetic phase diagram of type-II superconductors of Onsager?
Quantum vortex:  These ideas of Onsager were further developed by Richard Feynman in 1955 and in 1957 were applied to describe the magnetic phase diagram of type-II superconductors by Alexei Alexeyevich Abrikosov. Alexei Alexeyevich Abrikosov: Alexei Alexeyevich Abrikosov (Russian: Алексе́й Алексе́евич Абрико́сов ; 25 June 1928 – 29 March 2017) was a Soviet, Russian and American theoretical physicist whose main contributions are in the field of condensed matter physics.
i don't know