One-magnon inelastic light scattering in the canted antiferromagnet<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>NiF</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>

Meloche, E.; Cottam, M. G.; Gnezdilov, V. P.; Lockwood, D. J.

doi:10.1103/physrevb.81.024426

Cited by 10 publications

(12 citation statements)

References 17 publications

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“…units magnetooptic coefficient G 3 is included, it is found that the intensity contribution due to the upper branch is quadratic in the spin canting angle and thus may be neglected because of the small canting angle in NiF 2 . This theoretical prediction is consistent with the fact that the upper branch one-magnon scattering was not observed experimentally in the Raman spectra recorded in (YX) polarization [11].…”

Section: One-magnon Scatteringsupporting

confidence: 79%

“…9 we compare theory and experiment for the one-magnon scattering from the upper branch in (YZ) polarization for different values of the ratio |G + /K + | [11]. Here we show results for inphase scattering, i.e., with K − = G − = 0 as for equivalent sublattices.…”

Section: One-magnon Scatteringmentioning

confidence: 99%

“…It is still the case for these materials that the linear and quadratic magnetooptical coupling effects may apply, but their effects are different due to the different behavior already mentioned for the k = 0 onemagnon excitations [10,11].…”

Section: Magnetooptical Coupling and Raman Intensitiesmentioning

confidence: 99%

“…For this polarization two new magnetooptic coupling coefficients need to be introduced; K 3 and G 3 [11]. Setting G 3 = 0 results in the contribution to the integrated intensity due to the upper branch vanishing.…”

Section: One-magnon Scatteringmentioning

confidence: 99%

“…Although the two-magnon scattering can be analyzed within a simple effective spin S = 1/2 model [9], the one-magnon scattering case is much more complicated and has only recently been fully examined theoretically [10]. By contrast, NiF 2 presents a case of special interest [11] because of the role of the single-ion anisotropy in NiF 2 , which causes the sublattice magnetization to lie perpendicular (rather than parallel, as in the above-mentioned cases) to the crystal c axis and to be canted slightly in the ab plane away from the antiparallel alignment. This more unusual spin ordering is shown schematically in Fig.…”

Section: Introductionmentioning

confidence: 99%

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

Lockwood

Cottam

2012

Low Temperature Physics

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Inelastic light scattering intensities of magnetic excitations are governed by the magnetooptic coupling coefficients, which have been evaluated, for example, for the ferrimagnet Y 3 Fe 5 O 12 (YIG) and the metamagnets FeCl 2 and FeBr 2 . However, by far the most detailed studies to date have been performed on the classic rutilestructure antiferromagnets, and we summarize here the results obtained from the many experimental and theoretical investigations in these compounds for both one-magnon and two-magnon excitations. A comparison of the magnitudes of the various coupling coefficients for MnF 2 , FeF 2 , CoF 2 , and NiF 2 reveals a surprising similarity in many coefficients. In one-magnon Raman scattering, the in-phase linear magnetooptic coefficient dominates and the main differences between MnF 2 , FeF 2 , and NiF 2 lie in the relative significance of the in-phase quadratic magnetooptic coefficient. Thus the quadratic coefficients are now seen to be of particular importance in determining the strength of the one-magnon scattering in a variety of magnetic insulators. In two-magnon Raman scattering, one magnetooptic coefficient dominates for all of these antiferromagnets. However, each of the other six coefficients are remarkably similar in magnitude, in general, and not negligible in most cases, indicating some universality in the way light interacts with the pairs of magnons of opposite and equal wave vector in rutile structure antiferromagnets.

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Section: One-magnon Scatteringsupporting

confidence: 79%

Section: One-magnon Scatteringmentioning

confidence: 99%

Section: Magnetooptical Coupling and Raman Intensitiesmentioning

confidence: 99%

Section: One-magnon Scatteringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Lockwood

Cottam

2012

Low Temperature Physics

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Raman investigation of Fe-based chalcogenide films

Camerlingo

Nappi

Sarnelli

2020

Physica B: Condensed Matter

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One-magnon and exciton inelastic light scattering in the antiferromagnet CoF2

Meloche

Cottam

Lockwood

2014

Low Temperature Physics

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Experimental data are reported for the temperature and polarization dependence of the one-magnon Raman light scattering in the rutile-structure antiferromagnet CoF 2 (Néel temperature T N = 38 K). The low-lying excitons are also investigated at low temperatures and comparisons made with results from earlier Raman, infrared, and neutron scattering work. A detailed analysis of the one-magnon Stokes and anti-Stokes Raman spectra is presented resulting in comprehensive data for the temperature variation up to T N of the one-magnon frequency, line width, and integrated intensity. A theory of the one-magnon scattering and other magnetic transitions is constructed based mainly on a spin S = 3/2 exchange model, extending a simpler effective S = 1/2 approach. The excitation energies and spectral intensities over a broad range of temperatures are obtained using a Green's function equation of motion method that allows for a careful treatment of the single-ion anisotropy. Overall the S = 3/2 theory compares well with the experimental data.

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One-magnon inelastic light scattering in the canted antiferromagnetNiF2

Cited by 10 publications

References 17 publications

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

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

Raman investigation of Fe-based chalcogenide films

One-magnon and exciton inelastic light scattering in the antiferromagnet CoF2

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