Magnetooptic coupling coefficients for one- and two-magnon Raman scattering in rutile-structure antiferromagnets FeF₂, MnF₂, CoF₂, and NiF₂

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DOIResolve DOI: http://doi.org/10.1063/1.4733682
AuthorSearch for: ; Search for:
TypeArticle
Journal titleLow Temperature Physics
Fizika Nizkikh Temperatur
ISSN1063-777X
0132-6414
Volume38
Issue7
Pages703714; # of pages: 12
SubjectAntiferromagnets; Coupling coefficient; Ferrimagnets; In-phase; Inelastic light scattering; Magnetic excitations; Magnetic insulator; Magnons; Metamagnets; One-magnon Raman scattering; Quadratic coefficients; Rutile structure; Theoretical investigations; Two-magnon Raman scattering; Wave vector; Oxide minerals; Raman scattering; Antiferromagnetic materials
AbstractInelastic light scattering intensities in response to magnetic excitations are governed by magnetooptic coupling coefficients, which have been previously evaluated, for instance, for the ferrimagnetic Y3Fe5O12 (YIG) and the metamagnetic FeCl2 and FeBr2. However, by far the most detailed studies to date were performed on the classic rutile-structure antiferromagnets, and here we summarize the results obtained from the many experimental and theoretical investigations of these compounds for both one-magnon and two-magnon excitations. A comparison of the magnitudes of the various coupling coefficients for MnF2, FeF2, CoF2, and NiF2 reveals a surprising similarity in many coefficients. In one-magnon Raman scattering the in-phase linear magnetooptic coefficient dominates, and the main differences between MnF2, FeF2, and NiF2 lie in the relative significance of the in-phase quadratic magnetooptic coefficient. Thus, the quadratic coefficients now appear to be of particular importance in determining the strength of one-magnon scattering in a variety of magnetic insulators. In two-magnon Raman scattering one magnetooptic coefficient is dominant for all of these antiferromagnets. However, the other six coefficients are in general remarkably similar in magnitude and not negligible in most cases, indicating some similarity in the way light interacts with the pairs of magnons of opposite and equal wave vectors in rutile structure antiferromagnets.
Publication date
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number21269054
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Record identifier86ddec13-e1a5-4532-b375-a661db4a6cf5
Record created2013-12-03
Record modified2016-05-09
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