Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

High Resolution THz Optical Absorption Study of Antiferromagnetic Magnons in Hematite (alpha-Fe2O3)



Shin G. Chou, David F. Plusquellic, Paul E. Stutzman, Shuangzhen S. Wang, Edward J. Garboczi


We report the high resolution optical measurement for the temperature dependence of the antiferromagnetic resonance (AFMR) transition in alpha-Fe2O3 between (0.5 and 10)cm-1. We found that below the Morin transition temperature when the spins are perfectly antiparallel, the AFMR transition could be clearly observed. The absorption peak position over a large temperature range are found to be in good agreement with theoretical analysis. The high spectral resolution optical measurements as demonstrated in this study allows unprecedented zero-field analysis of the AFMR excitation in a previously challenging spectral region, suggesting the frequency-resolved measurement platform could be extended for non-destructive examination applications for antiferromagnetic materials and devices.
Applied Physics Letters


non-destructive examination, THz metrology


Chou, S. , Plusquellic, D. , Stutzman, P. , Wang, S. and Garboczi, E. (2012), High Resolution THz Optical Absorption Study of Antiferromagnetic Magnons in Hematite (alpha-Fe2O3), Applied Physics Letters, [online], (Accessed June 22, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created July 9, 2012, Updated November 10, 2018