Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes inGaMnAs

Wang, J.; Cotoros, I.; Dani, K. M.; Liu, X.; Furdyna, J. K.; Chemla, D. S.

doi:10.1103/PhysRevLett.98.217401

Title: Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes inGaMnAs

Abstract

We report on the observation of ultrafast photo-enhanced ferromagnetism in GaMnAs. It is manifested as a transient magnetization increase on a 100-ps time scale, after an initial sub-ps demagnetization. The dynamic magnetization enhancement exhibits a maximum below the Curie temperature {Tc} and dominates the demagnetization component when approaching {Tc}. We attribute the observed ultrafast collective ordering to the p-d exchange interaction between photoexcited holes and Mn spins, leading to a correlation-induced peak around 20K and a transient increase in {Tc}.

Authors:: Wang, J.; Cotoros, I.; Dani, K. M.; Liu, X.; Furdyna, J. K.; Chemla, D. S.

Publication Date:: Sat Feb 17 00:00:00 EST 2007

Research Org.:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Director. Office of Science. Basic EnergySciences

OSTI Identifier:: 918935

Report Number(s):: LBNL-62724
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: 504901; BnR: KC0202020; TRN: US200819%%512

DOE Contract Number:: DE-AC02-05CH11231

Resource Type:: Journal Article

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 98; Journal Issue: 21; Related Information: Journal Publication Date: May 22, 2007; Journal ID: ISSN 0031-9007

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; CURIE POINT; DEMAGNETIZATION; EXCHANGE INTERACTIONS; FERROMAGNETISM; MAGNETIZATION; TRANSIENTS

Citation Formats


                    Wang, J., Cotoros, I., Dani, K. M., Liu, X., Furdyna, J. K., and Chemla, D. S. Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes inGaMnAs.  United States: N. p., 2007. 
        Web.  doi:10.1103/PhysRevLett.98.217401.

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                    Wang, J., Cotoros, I., Dani, K. M., Liu, X., Furdyna, J. K., & Chemla, D. S. Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes inGaMnAs.  United States.  https://doi.org/10.1103/PhysRevLett.98.217401

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                    Wang, J., Cotoros, I., Dani, K. M., Liu, X., Furdyna, J. K., and Chemla, D. S. 2007.  
        "Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes inGaMnAs".  United States.  https://doi.org/10.1103/PhysRevLett.98.217401.  https://www.osti.gov/servlets/purl/918935.

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@article{osti_918935,

  title        = {Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes inGaMnAs},

  author       = {Wang, J. and Cotoros, I. and Dani, K. M. and Liu, X. and Furdyna, J. K. and Chemla, D. S.},

  abstractNote = {We report on the observation of ultrafast photo-enhanced ferromagnetism in GaMnAs. It is manifested as a transient magnetization increase on a 100-ps time scale, after an initial sub-ps demagnetization. The dynamic magnetization enhancement exhibits a maximum below the Curie temperature {Tc} and dominates the demagnetization component when approaching {Tc}. We attribute the observed ultrafast collective ordering to the p-d exchange interaction between photoexcited holes and Mn spins, leading to a correlation-induced peak around 20K and a transient increase in {Tc}.},

  doi          = {10.1103/PhysRevLett.98.217401},

  url          = {https://www.osti.gov/biblio/918935},
  journal      = {Physical Review Letters},

  issn         = {0031-9007},

  number       = 21,

  volume       = 98,

  place        = {United States},

  year         = {Sat Feb 17 00:00:00 EST 2007},

  month        = {Sat Feb 17 00:00:00 EST 2007}

}

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Title: Ultrafast Enhancement of Ferromagnetism via Photoexcited Holes inGaMnAs

Abstract

Citation Formats

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Propagating coherent acoustic phonon wave packets in In x Mn 1 − x As ∕ Ga Sb journal, October 2005

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Ultrafast Quenching of Ferromagnetism in InMnAs Induced by Intense Laser Irradiation journal, October 2005

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Ultrafast Spin Dynamics in Ferromagnetic Nickel
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Observation of the spin-charge thermal isolation of ferromagnetic ${Ga}_{0.94} {Mn}_{0.06} As$ by time-resolved magneto-optical measurements
journal, November 2003

Ultrafast magneto-optics in ferromagnetic III–V semiconductors
journal, July 2006

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journal, April 2003

Propagating coherent acoustic phonon wave packets in ${In}_{x} {Mn}_{1 - x} As ∕ Ga Sb$
journal, October 2005

Ultrafast Generation of Ferromagnetic Order via a Laser-Induced Phase Transformation in FeRh Thin Films
journal, November 2004

Ultrafast Quenching of Ferromagnetism in InMnAs Induced by Intense Laser Irradiation
journal, October 2005

Ultrafast Light-Induced Magnetization Dynamics of Ferromagnetic Semiconductors
journal, February 2006

Ultrafast Magneto-Optics in Nickel: Magnetism or Optics?
journal, July 2000

Magnetotransport properties of p -type (In,Mn)As diluted magnetic III-V semiconductors
journal, April 1992

Formation of the Bound Magnetic Polaron in (Cd,Mn)Se
journal, October 1983

Electric-field control of ferromagnetism
journal, December 2000

(Ga,Mn)As: A new diluted magnetic semiconductor based on GaAs
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Ferromagnetic Order Induced by Photogenerated Carriers in Magnetic III-V Semiconductor Heterostructures of (In,Mn)As/GaSb
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Optical evidence for transient photoinduced magnetization in ${La}_{0.7} {Ca}_{0.3} Mn O_{3}$
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