No data available.

Please log in to see this content.

You have no subscription access to this content.

No metrics data to plot.

The attempt to load metrics for this article has failed.

The attempt to plot a graph for these metrics has failed.

Magnetooptic coupling coefficients for one- and two-magnon Raman scattering in rutile-structure antiferromagnets FeF_{2}, MnF_{2}, CoF_{2}, and NiF_{2}

Rent:

Rent this article for

USD

10.1063/1.4733682

### Abstract

Inelastic light scattering intensities in response to magnetic excitations are governed by magnetooptic coupling coefficients, which have been previously evaluated, for instance, for the ferrimagnetic Y_{3}Fe_{5}O_{12} (YIG) and the metamagnetic FeCl_{2} and FeBr_{2}. 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 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 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.

© 2012 American Institute of Physics

Published online 27 July 2012

Acknowledgments: We thank our many collaborators, who are listed in the references given below, for their valuable contributions to the work reported here.

Article outline:

I. Introduction

II. Theory

A. Spin Hamiltonians and magnon frequencies

B. Magnetooptical coupling and Raman intensities

1. One-magnon scattering

2. Two-magnon scattering

III. Comparison with experiment

A. MnF2

1. One-magnon scattering

2. Two-magnon scattering

B. FeF_{2}

1. One-magnon scattering

2. Two-magnon scattering

C. CoF_{2}

1. One-magnon scattering

2. Two-magnon scattering

D. NiF2

1. One-magnon scattering

2. Two-magnon scattering

IV. Discussion of magnetooptic coupling parameters

A. One-magnon coefficients

B. Two-magnon coefficients

V. Conclusion

/content/aip/journal/ltp/38/7/10.1063/1.4733682

http://aip.metastore.ingenta.com/content/aip/journal/ltp/38/7/10.1063/1.4733682

Article metrics loading...

/content/aip/journal/ltp/38/7/10.1063/1.4733682

2012-07-27

2014-04-19

Full text loading...

### Most read this month

Article

content/aip/journal/ltp

Journal

5

3

Commenting has been disabled for this content