2008
DOI: 10.1088/0022-3727/41/16/164005
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Ultrafast magnetization dynamics of antiferromagnetic compounds

Abstract: In three different antiferromagnetic (AFM) materials we show that the magnetization dynamics of AFM compounds differs noticeably from that of ferromagnetic compounds. Optical second harmonic generation and linear reflection were used to monitor with a temporal resolution of <1 ps the evolution of the AFM order parameter subsequent to an intense optical excitation. Comparison of the dynamical properties of the model antiferromagnet Cr2O3 with model ferro- and ferrimagnets reveals that spin–lattice relaxation as… Show more

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Cited by 81 publications
(69 citation statements)
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“…The susceptibility w (2) parameterizing this conversion process is highly sensitive to the symmetry of the SHG-active compound, and since ferroic order changes the symmetry its emergence will be accompanied by the corresponding symmetry-allowed SHG components. This has been widely employed to probe the ferroic state in a multitude of oxides, including in particular the ultrafast dynamics of magnetic order 24,25 .…”
Section: Resultsmentioning
confidence: 99%
“…The susceptibility w (2) parameterizing this conversion process is highly sensitive to the symmetry of the SHG-active compound, and since ferroic order changes the symmetry its emergence will be accompanied by the corresponding symmetry-allowed SHG components. This has been widely employed to probe the ferroic state in a multitude of oxides, including in particular the ultrafast dynamics of magnetic order 24,25 .…”
Section: Resultsmentioning
confidence: 99%
“…[68][69][70][71][72] For example, picosecond-scale reorientation of the antiferromagnetic spin-axis was reported in an optical pump-and-probe study of a rare-earth orthoferrite. 68 The origin of the generated staggered field was different than in current induced spin torques discussed above.…”
Section: 67mentioning
confidence: 99%
“…[15][16][17][18][19][20][21][22][23] However, the ultrafast dynamic demagnetization processes were not probed until recently. 13,[24][25][26] The timeresolved second harmonic generation is applied to probe the time evolution of the magnetic and structural state following laser illuminations in the AFM insulator. Variations in the pump photon-energy lead to either localized transitions within the metal-centered states of the Cr ion or charge transfer between Cr and O.…”
Section: Introductionmentioning
confidence: 99%