@article{dd16cf973d534c33b644c07b110e0cf4,
title = "Femtosecond dynamics of the collinear-to-spiral antiferromagnetic phase transition in CuO",
abstract = "We report on the ultrafast dynamics of magnetic order in a single crystal of CuO at a temperature of 207 K in response to strong optical excitation using femtosecond resonant x-ray diffraction. In the experiment, a femtosecond laser pulse induces a sudden, nonequilibrium increase in magnetic disorder. After a short delay ranging from 400 fs to 2 ps, we observe changes in the relative intensity of the magnetic ordering diffraction peaks that indicate a shift from a collinear commensurate phase to a spiral incommensurate phase. These results indicate that the ultimate speed for this antiferromagnetic reorientation transition in CuO is limited by the long-wavelength magnetic excitation connecting the two phases.",
author = "Johnson, {S. L.} and {De Souza}, {R. A.} and U. Staub and P. Beaud and E. M{\"o}hr-Vorobeva and G. Ingold and A. Caviezel and V. Scagnoli and Schlotter, {W. F.} and Turner, {J. J.} and O. Krupin and Lee, {W. S.} and Chuang, {Y. D.} and L. Patthey and Moore, {R. G.} and D. Lu and M. Yi and Kirchmann, {P. S.} and M. Trigo and P. Denes and D. Doering and Z. Hussain and Shen, {Z. X.} and D. Prabhakaran and Boothroyd, {A. T.}",
year = "2012",
month = jan,
day = "19",
doi = "10.1103/PhysRevLett.108.037203",
language = "English",
volume = "108",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "3",
}