| 释义 |
Meissner effect Physics.|ˈmaɪsnə(r)|
[named after Fritz Walther Meissner (1882–1974), German physicist, who with R. Ochsenfeld published an account of the phenomenon in Naturwissenschaften (1933) XXI. 787.]
The existence of zero, or very low, magnetic induction in a superconducting material even in the presence of a magnetic field; esp. the (partial or complete) expulsion of magnetic flux when the material becomes superconducting in a magnetic field.
[1935Proc. R. Soc. A. CXLIX. 73 Equation (6) says more than (2), so far as it includes Meissner's effect.] 1935Ibid. CLII. 10 The magnetization curve for decreasing fields is in striking contradiction to the classical electro⁓magnetic description of a Supraconductor, and provides an independent confirmation that B = o is characteristic of the ideal supraconducting state (Meissner effect). 1953C. F. Squire Low Temperature Physics vii. 116 The complete Meissner effect (B = o) is difficult to obtain experimentally. Ibid. 117 (heading) A permanent magnet floats above the superconducting tin dish because of the Meissner effect. 1968C. G. Kuper Introd. Theory Superconductivity iii. 44 It is rather unusual in physics for purely topological properties of a body to be important, but superconductivity provides an example. In a multiply-connected superconducting body, although the Meissner effect ensures that the magnetic flux will be expelled from the material of the body, flux may be trapped in the holes. |