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Crowell Group: Spin Dynamics, Transport, and Magneto-optics

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2006-2007
2005
2003-2004
before 2002

Publications 2006-2007 [Top]

Electrical Detection of Spin Transport in Lateral Ferromagnet-Semiconductor Devices
X. Lou, C. Adelmann, S. A. Crooker, E. S. Garlid, J. Zhang, S. M. Reddy, S. D. Flexner, C. J. Palmstrøm, and P. A. Crowell, Nature Physics 3, 197 (2007).[link]
Exchange Bias as a Probe of the Incommensurate Spin-Density Wave in Fe/Cr (001)
J. S. Parker, L. Wang, K. A. Steiner, P. A. Crowell, and C.Leighton, Phys Rev. Lett. 97 137202 (2006)
. [link]
Dymamics of a Pinned Magnetic Vortex
R. L. Compton and P. A. Crowell, Phys Rev. Lett. 97 137202 (2006)
. [link]
Spin injection from perpendicular magnetized ferromagnetic δ-MnGa into (Al,Ga)As heterostructures
C. Adelmann, J. L. Hilton, B. D. Schultz, S. McKernan, C. J.Palmstrøm, X. Lou, H.-S. Chiang, and P. A. Crowell,
Appl. Phys. Lett.  89, 112511 (2006). [link]
Electrical Detection of Spin Accumulation at a Ferromagnet-Semiconductor Interface
X. Lou, C. Adelmann, M. Furis, S. A. Crooker, C. J. Palmstrøm, and P. A. Crowell, Phys. Rev. Lett. 96, 176603 (2006).[link]

Publications 2005 [Top]

Electron Spin Dynamics and Hyperfine Interactions in Fe/AlGaAs/GaAs Spin Injection Heterostructures
J. Strand, X. Lou, C. Adelmann, B. D. Schultz, A. F. Isakovic, C. J. Palmstrom, P. A. Crowell, Phys. Rev. B 72, 155308 (2005).[link]
Interactions of Spin Waves with a Magnetic Vortex
J. P. Park, P. A. Crowell, Phys. Rev. Lett. 95, 167201 (2005).[link]
Imaging Spin Transport in Lateral Ferromagnet/Semiconductor Structures
S. A. Crooker, M. Furis, X. Lou, C. Adelmann, D. L. Smith, C. J. Palmstrøm, P. A. Crowell, Science, 309, 2191 (2005).[link]
Effects of Doping Profile and Post-growth Annealing on Spin Injection from Fe into AlGaAs Heterostructures
C. Adelmann, J. Q. Xie, C. J. Palmstrøm, J. Strand, X. Lou, J. Wang, P. A. Crowell, J. Vac. Sci. Tec. B 23, 1747 (2005).[link]
Excitations in Vortex-state Permalloy Dots
C. E. Za J. P. Park, P. A. Crowell, Phys. Rev. B 72, 024427 (2005). [link]
Direct Measurement of Spatially Localized FMR Modes in an Antidot Lattice
M. J. Pechan, C. Yu, R. L. Compton, J. P. Park, and P. A. Crowell, J. Appl. Phys. 97, 10J903 (2004).[link]
Time Domain Dynamics of the Asymmetric Magnetization Reversal in Exchange Biased Bilayers
D. M. Engebretson, W. A. A. Macedo, I. K. Schuller, P. A. Crowell, C. Leighton, Phys. Rev. B 71 184412 (2005).[link]
Spin Injection and Relaxation in Ferromagnet-Semiconductor Heterostructures
C. Adelmann, X. Lou, J. Strand, C. J. Palmstrøm, and P. A. Crowell, Phys. Rev. B 71, 121301(R) (2005).[link]
Spin Injection from the Heusler Alloy Co2MnGe into Al0.1Ga0.9As/GaAs Heterostructures
X. Y. Dong, X. Lou, C. Adelmann, J. Strand, J. Q. Xie, C. J. Palmstrøm, P. A. Crowell, J.-P. Barnes, and A.K. Petford-Long, Appl. Phys. Lett. 86, 102107 (2005).[link]

Publications 2003 - 2004 [Top]

Spin Waves in an Inhomogeneously Magnetized Stripe
C. Bayer, J. P. Park, H. Wang, M. Yan, C. E. Campbell, and P. A. Crowell, Phys. Rev. B 69, 134401 (2004).
Full text (pdf format)
Nuclear Magetic Resonance in a Ferromagnet-Semiconductor Heterostructure 
J. Strand, B. D. Schultz, A. F. Isakovic, X. Lou, C. J. Palmstrøm, and P. A. Crowell, Appl. Phys. Lett. 83, 3335 (2003).
Full text (pdf format)
Dynamic Nuclear Polarization by Electrical Spin Injection in Ferromagnet-Semiconductor Heterostructures
J. Strand, B. D. Schultz, A. F. Isakovic, C. J. Palmstrøm, and P. A. Crowell, Phys. Rev. Lett. 91, 036602 (2003).
Full text (pdf format)
Tunable Magnetization Reversal in Epitaxial bcc Fe1-xCox Films on Vicinal Surfaces
J. A. Wolf, K. K. Anderson, E. D. Dahlberg, P. A. Crowell, L. C. Chen, and C. J. Palmstrøm,   J. Appl. Phys. 93, 8256 (2003).Full text (pdf format)
Simulations of Magnetic Dynamics in Iron-Cobalt Films 
M. Yan, J. Berezovsky, P. A. Crowell, and C. E. Campbell,  Condensed Matter Theories Vol 17, edited by M. P. Das and F. Green (Nova, New York, 2003), p. 295.Full text (pdf format)
Imaging of Spin Dynamics in Closure Domain and Vortex Structures
J.P. Park, P. Eames, D.M. Engebretson, J. Berezovsky, and P.A. Crowell, Phys. Rev. B 67, 020403R (2003).
Full text (pdf format)

Publications before 2002  [Top]

Spatially Resolved Dynamics of Localized Spin-Wave Modes in Ferromagnetic Wires
J. P. Park, P. Eames, D. M. Engebretson, J. Berezovsky, and P. A. Crowell, Phys. Rev. Lett. 89, 277201 (2002).
Full text (pdf format) 
Terahertz Emission from Magneto-plasma Oscillations in Semiconductors 
J. N. Heyman, H. Wrage, C. Lind, D .Hebert, P. Neocleous, P. A. Crowell, T. Müller, and K. Unterrainer, Ultrafast Phenomena in Semiconductors VI, Kong-Thon F. Sen, Jin-Joo Song, Hongxing Jiang, Editors, Proceedings of SPIE, Vol. 4643, 12-18 (2002).Full text (pdf format)
Optically Pumped Transport in Ferromagnet-Semiconductor Schottky Diodes
A. F. Isakovic, D. M. Carr, J. Strand, B. D Schultz, C. J. Palmstrøm, and P. A. Crowell,  J. Appl. Phys. 91, 7261 (2002).
 Full text (pdf format)
Time-Domain Ferromagnetic Resonance in Epitaxial Thin Films

D. M. Engebretson, J. Berezovsky, J. P. Park, L. C. Chen, C. J. Palmstrøm, and P. A. Crowell, J. Appl. Phys. 91, 8040 (2002)   Full text (pdf format)
Optical Pumping in Ferromagnet-Semiconductor Heterostructures:  Magneto-optics and Spin Transport
A. F. Isakovic, D. M. Carr, J. Strand, B. D. Schultz,  C. J. Palmstrøm, and P.A. Crowell, Phys. Rev. B 64, 161304R (2001).
Full text (pdf format)
Terahertz Emission from GaAs and InAs in a Magnetic Field
J. N. Heyman, P. Neocleous, D. Hebert, P. A. Crowell, T. Müller, and K. Unterrainer,  Phys. Rev. B 64, 085202 (2001).
 Full text (pdf format)
Control of Magnetic Anisotropy in Fe1-xCox Films on Vicinal GaAs and Sc1-yEryAs Surfaces
A. F. Isakovic, J. Berezovsky, P. A. Crowell, L. C. Chen, D. M. Carr, B. D. Schultz, and C. J. Palmstrøm, Journal of Applied Physics  89, 6674 (2001). Full text (pdf format)

Epitaxial Ferromagnetic Metal/GaAs (001) Heterostructures
L. C. Chen, J. W. Dong, B. D. Schultz, C. J. Palmstrøm, J. Berezovsky, A. Isakovic, P. A. Crowell, and N. Tabat, J. Vac. Sci. Tech. B 18, 2057 (2000). Full text (pdf format)
Magnetic Circular Dichroism Studies of Carrier-Induced Ferromagnetism in (Ga­1-xMnx)As
B. Beschoten, P. A. Crowell, I. Malajovich, D. D. Awschalom, F. Matsukura, A. Shen, and H. Ohno,  Phys. Rev. Lett. 83, 3073 (1999). Full text (pdf format)