Onsager-Casimir principle and reciprocity relations for bianisotropic media

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


To use the general reciprocity theorem for bianisotropic media, the physical basis should be established. There is the Onsager-Casimir principle that shows how the time-reversal invariance of microscopic equations of motion gives certain relations for macroscopic susceptibilities of a causal linear bianisotropic medium. In this paper, we show that in a general case of a bianisotropic medium, the Onsager-Casimir principle is not the same as the Lorentz reciprocity. We discuss the fact that one cannot use the Onsager-Casimir principle to "ensure the physicality" of the known microwave chiral and Ω-media. At the same time, we show that the Onsager-Casimir principle is applicable to new particulate bianisotropic composites - the MCBMs. The MCBMs give an example of nonreciprocal bianisotropic media with dynamical constitutive symmetry.

Original languageEnglish
Pages (from-to)412-416
Number of pages5
JournalMicrowave and Optical Technology Letters
Issue number6
StatePublished - 1 Jan 1998
Externally publishedYes


  • Bianisotropic media
  • Generalized susceptibility
  • Kinetic coefficient symmetry
  • Lorentz reciprocity
  • Nonreciprocal bianisotropic materials

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Onsager-Casimir principle and reciprocity relations for bianisotropic media'. Together they form a unique fingerprint.

Cite this