Spin oscillations in antiferromagnetic NiO triggered by circularly polarized light

Spin oscillations in antiferromagnetic NiO triggered by circularly polarized light

Coherent spin oscillations were nonthermally induced by circularly polarized pulses in the fully compensated antiferromagnet NiO. This effect is attributed to the action of the effective magnetic field generated by an inverse Faraday effect on the spins. The novelty of this mechanism is that spin os...

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Bibliographic Details
Published in:Physical review letters Vol. 105; no. 7; p. 077402
Main Authors: Satoh, Takuya, Cho, Sung-Jin, Iida, Ryugo, Shimura, Tsutomu, Kuroda, Kazuo, Ueda, Hiroaki, Ueda, Yutaka, Ivanov, B A, Nori, Franco, Fiebig, Manfred
Format: Journal Article
Language:English
Published: United States 11-08-2010
Online Access:Get full text
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Summary:Coherent spin oscillations were nonthermally induced by circularly polarized pulses in the fully compensated antiferromagnet NiO. This effect is attributed to the action of the effective magnetic field generated by an inverse Faraday effect on the spins. The novelty of this mechanism is that spin oscillations are driven by the time derivative of the effective magnetic field which acts even on "pure" antiferromagnets with zero net magnetic moment in the ground state. The measured frequencies (1.07 THz and 140 GHz) correspond to the out-of-plane and in-plane modes of antiferromagnetic spin oscillations.
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ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.105.077402