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spatially resolved chemistry of the ZDDPdet film was found to be short-chain calcium phosphate throughout. Fiducial marks allowed for the re-location of the same areas with an imaging nanoindenter. This allowed the nanoscale mechanical properties, of selected antiwear pads, to be measured on the same length scale. The indentation modulus of the ZDDP antiwear pads were found to be heterogeneous, ~120 GPa at the center and ~90 GPa at the edges. The ZDDPdet antiwear pads were found to be more uniform and have a similar indentation modulus of ~90 GPa. A theory explaining this measured similarity, which is based on the probing depths of all techniques used, sheds new insight into the structure and mechanical response of ZDDP antiwear films.
ELECTRONIC PROPERTIES OF MN-SILICIDE ON SI(111) J. J. Paggel, K. Schwinge, G. Ctistis, U. Deffke, and P. Fumagalli Institut für Experimentalphysik, Freie Universität Berlin, Germany T. Miller and T.-C. Chiang Department of Physics, University of Illinois at Urbana-Champaign, IL and Frederick-Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, IL The electron spin as new degree of freedom in electronics is widely discussed. One central problem is spin-injection into the semiconductor material, i.e. the transfer of the spinpolarization from the magnetic electrode into the semiconductor. It is generally believed that structural disorder at the interface will lower the injection efficiency. In order to achieve high spin-polarization in the semiconductor, epitaxial, magnetic films on semiconductors are therefore sought after. Mn – in its conventional antiferromagnetic -phase – might be a promising candidate for magnetic films on silicon. Its fcc-phase is lattice matched to Si. There is even a large probability for Mn to be ferromagnetic at RT in this phase. Growing Mn-films on Si(111) yields epitaxial films with six-fold symmetry. Auger electron spectroscopy indicates a large Si-content of the films, maybe even a Si surface layer. RHEED and STM indicate closed films of good quality. The nature of these films could not be revealed using our laboratory experiments. Photoelectron spectroscopy experiments, reported here, identify the film as metallic Mn-silicide. The bonding character between Mn and Si is largely covalent. The Si2p core-level from the silicide is very simple and shows a striking similarity to the core-level of the famous Si(111)-(77) reconstruction, turning the interest from potential application of the films to basic research, as the electronic properties of the Si(111)-(77) are still under debate. The Si(111)-(77) reconstruction shows at least two nearly dispersionless surface states, associated with adatoms, which are also identified as origin for the prominent surface core-level of the Si(111)-(77) reconstruction. The Si2p core-level from the silicide shows a similar surface component, such that an adatom surface state was expected. The latter has not been found yet. This work was funded by the Deutsche Forschungsgemeinschaft through SFB 290 and grant Pa661/5-1, the U.S. National Science Foundation (grant DMR-02-03003), the U.S. Department of Energy, Division of Materials Sciences (grant DEFG02-91ER45439), and the Petroleum Research Fund, administered by the American Chemical Society. The Synchrotron Radiation Center is supported by the National Science Foundation under grant DMR-00-84402.
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Welcome to the 36 th SRC Users’ M
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12:20 - 1:10 Lunch 1:10 -1:45 Poste
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Administration Executive Director D
Page 8 and 9: STATUS OF THE SRC BEAMLINES AND INS
Page 10 and 11: ACCELERATOR DEVELOPMENTS Ken Jacobs
Page 12 and 13: HIGH ENERGY RESEARCH POSSIBILITIES
Page 14 and 15: ATOMICALLY UNIFORM THIN FILMS ON SI
Page 16 and 17: calculated binding energies of the
Page 18 and 19: MANY-ELECTRON EFFECTS ON THE XE 5S
Page 20 and 21: PHOTOELECTRON SPECTROMETRY OF ATOMI
Page 22 and 23: PHOTOEMISSION STUDY OF USb AND UTe
Page 24 and 25: CANADIAN SYNCHROTRON RADIATION FACI
Page 26 and 27: SELF-ASSEMBLY OF BLOCK COPOLYMERS O
Page 28 and 29: A B S T R A C T S
Page 30 and 31: Photoemission spectra, a.u. -0.3 -0
Page 32 and 33: THE INITIAL AND FINAL STATE BANDS I
Page 34 and 35: TRANSITION LAYERS AT BURIED FERROMA
Page 36 and 37: LOW-DIMENSIONAL ELECTRONS AT SILICO
Page 38 and 39: SUBCELLULAR DISTRIBUTION OF MOTEXAF
Page 40 and 41: LINEAR POLARIZATION MEASUREMENTS OF
Page 42 and 43: Fig.1: Photoemission spectra of opt
Page 44 and 45: The sample manipulator has a cool d
Page 46 and 47: Cr and Fe but for these U systems t
Page 48 and 49: [4] G. -H. Gweon, J. W. Allen, and
Page 50 and 51: References [1] S. Cho, Y. Kim, A. D
Page 52 and 53: [3] D. L. Mills, Physical Review B
Page 54 and 55: CHARACTERIZATION OF SULPHATE INTERA
Page 56 and 57: in the data acquisition chamber. Th
Page 60 and 61: THE RELATIONSHIP BETWEEN PHOSPHATE
Page 62 and 63: PHOTOEMISSION STUDIES OF QUANTUM WE
Page 64 and 65: Ag surface state such that it moves
Page 66 and 67: HIGH-RESOLUTION STUDY OF THE LITHIU
Page 68 and 69: RELATIVE PARTIAL CROSS SECTIONS AND
Page 70 and 71: Christian Ast Max-Planck Institute
Page 72 and 73: David L. Huber Physical Sciences La
Page 74 and 75: Tom Miller University of Illinois a
Page 76 and 77: Eric Wiedemann University of Wiscon
Page 78 and 79: Pete Hagen Phone: (608) 877-2154 Em
Page 80: NOTES
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