| 释义 |
antiferromagnetic, a. and n.|ˌæntɪfɛrəʊmægˈnɛtɪk|
[ad. G. antiferromagnetisch (L. Hulthèn 1936, in Proc. Kon. Akad. Amsterdam XXXIX. 190), f. anti-1 3 + ferromagnetic a.]
A. adj. Characterized by oppositely directed (or anti-parallel) alignment of electron spin.
B. n. A magnetic substance with these properties.
L. Néel 1932, writing in French in Ann. Phys. XVIII. 5f., introduced the idea of antiferromagnetism but did not use the words antiferromagnétique, -magnétisme.
1936Sci. Abstr. A. XXXIX. 548 Cases where interchange action occurs, but with a positive coefficient, are indicated as antiferromagnetic. 1938Physical Rev. LIV. 82/1 Manganese probably is an antiferromagnetic substance. 1949Ibid. LXXVI. 1257/1 At absolute zero all of the atoms on one lattice have their electronic magnetic moments aligned in the same direction and all of the atoms on the other lattice have their moments antiparallel to the first. Above the Curie temperature the thermal energy is sufficient to overcome the tendency of the atoms to lock antiparallel... Materials exhibiting the characteristics described above have been designated ‘antiferromagnetic’. 1955Sci. News XXXVII. 36 In ferro-, antiferro-, or ferri-magnetics the alignment of atomic magnets is ordered and periodic.
Hence ˌantiferroˈmagnetism, the quality of being antiferromagnetic; the phenomena exhibited by antiferromagnetic bodies.
1938F. Bitter in Physical Rev. LIV. 79 The proposed equations of state..may be regarded as an attempt to describe antiferromagnetism (i.e., the case in which oppositely directed spins on adjacent atoms have the lowest energy). 1961Encycl. Dict. Physics I. 222/1 The state of complete antiferromagnetism (antiparallel alignment of spin vectors) will be attained only at absolute zero. |