@article{f1126ca380b94002b1be963f4685bb21,
title = "Terahertz spectroscopy of spin waves in multiferroic BiFeO3 in high magnetic fields",
abstract = "We have studied the magnetic field dependence of far-infrared active magnetic modes in a single ferroelectric domain BiFeO3 crystal at low temperature. The modes soften close to the critical field of 18.8 T along the [001] (pseudocubic) axis, where the cycloidal structure changes to the homogeneous canted antiferromagnetic state and a new strong mode with linear field dependence appears that persists at least up to 31 T. A microscopic model that includes two Dzyaloshinskii-Moriya interactions and easy-axis anisotropy describes closely both the zero-field spectroscopic modes as well as their splitting and evolution in a magnetic field. The good agreement of theory with experiment suggests that the proposed model provides the foundation for future technological applications of this multiferroic material.",
author = "U. Nagel and Fishman, {Randy S.} and T. Katuwal and H. Engelkamp and D. Talbayev and Yi, {Hee Taek} and Cheong, {S. W.} and T. R{\~o}{\~o}m",
year = "2013",
month = jun,
day = "17",
doi = "10.1103/PhysRevLett.110.257201",
language = "English",
volume = "110",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "25",
}