Phys. Rev. Lett. 56, 2752–2754 (1986)Nonreciprocal Optical Reflection of the Uniaxial Antiferromagnet MnF2Received 1 April 1986; published in the issue dated 23 June 1986 Microwave reflectivity measurements in Voigt geometry were performed on a polished surface of MnF2. We observed nonreciprocal behavior in the reflectivity with respect to the magnetic field reversal. The nonreciprocal behavior of the antiferromagnet's reflectivity gives clear evidence for the existence of nonreciprocal dipolar antiferromagnetic surface spin-wave excitations. The results are quantitatively explained. They give very accurate values for antiferromagnetic resonance and spin-wave damping. © 1986 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.56.2752
DOI:
10.1103/PhysRevLett.56.2752
PACS:
75.50.Ee
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