Bean基于K.Mendelssohn海绵模型建立了非理想Ⅱ类超导体临界态理论，从而形成了硬超导体电磁理论的重要基础之一。
Mendelssohn sponge model established the remarkable critical state theory of the hard superconductors . This theory became the fundamental theory on discussing the hard superconductor electromagnetic properties .
硬超导体