AVS2010 Session MI-ThP: Magnetic Interfaces Poster Session

Thursday, October 21, 2010 6:00 PM in Room Southwest Exhibit Hall
Thursday Evening

Time Period ThP Sessions | Topic MI Sessions | Time Periods | Topics | AVS2010 Schedule

MI-ThP-1 Investigations of Magnetic Overlayers at the Advanced Photon Source
G.D. Waddill (Missouri University of Science and Technology); SungWoo Yu, M.T. Butterfield (Lawrence Livermore National Laboratory); Takashi Komesu (Missouri University of Science and Technology); James G. Tobin (Lawrence Livermore National Laboratory)
Magnetic overlayers of Fe and Co have been investigated with X-ray Magnetic Circular Dichroism in X-ray Absorption Spectroscopy (XMCD-XAS) and Photoelectron Spectroscopy (PES), including Spin- Resolved Photoelectron Spectroscopy (SRPES), at Beamline 4 at the Advanced Photon Source (APS). Particular emphasis was placed upon the interrogation of the 2p levels of the Fe.
MI-ThP-3 Fabrication of a Non Local Spin Logic Device with Exfoliated Graphene Channel
Joseph R. Abel, Akitomo Matsubayashi, John J. Garramone, Vincent P. LaBella (University at Albany)

The use of the electron spin has gained considerable attention lately as a possible substitute for charge-based electronics [1,2]. This poster will focus on the fabrication of a spin logic device that utilizes graphene as the spin transport channel since graphene has been shown to have a long spin lifetime at room temperature [3]. The device is prepared utilizing exfoliated graphene on SiO2. The injection and readout contacts were fabricated with and without aluminum oxide as a tunnel barrier which was deposited using thermal evaporation of Al in ultra high vacuum (UHV) and then subsequent oxidation in O2. Then Co/Au was deposited under high vacuum and 100-200-nm-wide contacts were pattered using e-beam lithography followed by a standard liftoff technique. Scanning electron microscopy and optical images will be presented of the fabrication process and the device. Non-local spin valve and Hanle measurements are being pursued to characterize the spin injection polarization and the spin relaxation in the graphene channel.

[1] Behin-Aein, B., Datta, D., Salahuddin, S., Datta, S. Nat Nano 5:266-270 (2010)

[2] Dery, H. Dalal, P., Cywinski, L. & Sham, L.J. Nature 447, 573-576 (2007)

[3] Tombros, N., Jozsa, C., Popinciuc, M., Jonkman, H.T., Van Wees, B.J. Nature, 448 (7153), pp. 571-574 (2007)

MI-ThP-4 Magnetic Properties of Zn1-xMnxO Thin Film Grown by Pulsed Laser Deposition
Tzung-Chen Wu, Yi-Chen Yeh, Da-Ren Liu (National Applied Research Laboratories, Taiwan); Hong-Ji Lin, Meng-Jie Huang (National Synchrotron Radiation Research Center, Taiwan)
In this paper, Zn1-xMnxO (x=0~0.1) thin films were grown on corning glass、sapphire (0001) and silicon (100) substrates by pulsed laser deposition (PLD). Atomic force microscopy (AFM) and magnetic force microscopy (MFM) were used to characterize the surface properties of Zn1-xMnxO thin film, and the high-resolution x-ray diffraction (XRD) was used to measure the crystallographic structure of this film. Moreover, superconducting quantum interference device (SQUID) magnetometer was employed to investigate the magnetic moments. X-ray magnetic circular dichroism (XMCD) spectra of Zn1-xMnxO films were also measured to clarify their spin and orbital magnetic moment properties. Integrating above measurements, these results reveal that substrate plays an important role and oxygen is the key factor for magnetic properties of Zn1-xMnxO thin films.
Time Period ThP Sessions | Topic MI Sessions | Time Periods | Topics | AVS2010 Schedule