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Relativistic Symmetries and Lower Bounds for the Magneto‐Electric Susceptibility and the Ratio of Polarization to Magnetization in a Ferromagneto‐Electric Crystal
Author(s) -
Ascher E.
Publication year - 1974
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220650227
Subject(s) - magnetization , homogeneous space , orthorhombic crystal system , condensed matter physics , polarization (electrochemistry) , polarization density , physics , magnetic susceptibility , magneto , quantum mechanics , chemistry , mathematics , magnetic field , diffraction , geometry , voltage
A definition of the relativistic symmetry of a polarized crystalline medium is proposed. The requirement of invariance of the susceptibility under this group gives rise to relations between the components of the tensor which then are used in the case of orthorhombic boracite to obtain lower bounds for the magneto‐electric susceptibility and for the ratio of the spontaneous polarization to magnetization.