비의류제품

acoustic cotton-mouton effect in antiferromagnets

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 476
a rotationally invariant theory of a magnetic acoustic birefringence is developed for tetragonal antiferromagnets with the rutile structure (fluorides) in a situation with k//l//b//4//z, where k, l, and b are, respectively, the wave vector of sound, and the antiferromagnetic and magnetic field vectors, and 4 is the tetragonal symmetry axis. the effect is proportional to the product l/sub z/b/sub z/ and is governed by the combined effect of the piezomagnetism and magnetostriction. a quantitative estimate of the effect is obtained for cof/sub 2/. trigonal antiferromagnets in a state with l perpendicular to 3 are also considered, thus providing a quantitative explanation of the experimental results obtained by gakel' (jetp lett.9, 360 (1969)), who discovered oscillations of the amplitude of sound transmitted by an mnco/sub 3/ plate as a function of b
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