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PHOIBOS 150 Mott - MCD

Hemispherical Energy Analyzer with MCD Detector for XPS, UPS, ISS and LEISS and MOTT Detector for Spin Measurements with 150 mm Mean Radius

Spin detector for Hemispherical Energy Analyzer PHOIBOS 225 Mott MCD

The PHOIBOS 150 hemispherical energy analyzer is the-state-of-the-art analysis solution for photoelectron spectroscopy. This analyzer can be operated in all relevant analysis modes, such as UPS, XPS, UPS, as well as AES, ISS and LEISS. Its design and the modular supplementary hardware makes this analyzer the most versatile PES analyzer in the market.

This detector combines a classical multi channeltron detector with 6 channels and a spin detection channel for subsequent XPS/UPS and Spin measurements. The actual spin detector is based on the Rice University mini MOTT scheme, where a thin tungesten target on high voltage (25 kV) is used as a spin selective scattering target. With the MOTT detector it is possible to measure 4 channels in one experminet (two spin components with spin up/down, respectively).

The energy analyzer sectionis equipped with 8 customizable entrance and 3 exit slits. For highest energy resolution the entrance slit can be chosen down to 50 µm, providing achievable energy resolution better than 1.8 meV. The analyzer comes with a highly stable power supply, the HSA 3500 plus, for best performance in a wide kinetic energy range.

KEY FEATURES

  • Robust Spin Detector with long lifetime
  • High Energy Scattering Scheme
  • 6 Channel MCD Detector
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MADE FOR THESE METHODS

2
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APPLICATION NOTES

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PUBLICATIONS

  1. (2008) A possible source of spin polarized electrons: The inert graphene/Ni(111) system

    We report on an investigation of spin-polarized secondary electron emission from the chemically inert system: graphene/Ni(111). An ordered passivation graphene layer (monolayer of graphite) was formed on Ni(111) surface via cracking of propylene gas. The spin polarization of secondary electrons obtained from this system upon photoemission is only slightly lower than the one from the clean Ni surface but does not change upon large oxygen exposure. These results suggest to use such passivated Ni(111) surface as a source of spin-polarized electrons stable against adsorption of reactive gases.



    Yu. S. Dedkov, M. Fonin, C. Laubschat
    Appl. Phys. Lett. 92, 052506
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  2. (2008) Graphene-protected iron layer on Ni(111)

    Here we report a photoemission study of the Fe intercalation underneath a graphene layer on Ni(111). The process of intercalation was monitored by means of x-ray photoemission of corresponding core levels as well as ultraviolet photoemission of the graphene-derived π states in the valence band. Thin fcc Fe layers (2–5 ML thickness) at the interface between a graphene capping layer and Ni(111) form epitaxial films passivated from the reactive environment.



    Yu. S. Dedkov, M. Fonin, U. Rüdiger, C. Laubschat
    Appl. Phys. Lett. 93, 022509
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  3. (2007) Evidence for the short-period oscillations in spin-resolved photoemission of thin Cr(110) films

    The spin-resolved electronic structure of thin Cr overlayers on top of the Fe(110) surface was investigated by means of spin- and angle-resolved photoelectron spectroscopy. The initial fast drop of photoelectron spin-polarization at the Fermi level, followed by weak oscillatory behavior with the period of about 2 ML, can give an evidence for the first time spectroscopic observation of the short period oscillations in (110)-oriented thin Cr films.



    Yu. S. Dedkov
    Eur. Phys. J. B 57, pp. 15-19
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  4. (2007) Spin dependence of 4f hybridization: A spin-resolved resonant photoemission study of Ce∕Fe(110)

    Spin- and angle-resolved resonant (Ce 4d→4f) photoemission spectra of a monolayer Ce on Fe(110) reveal spin-dependent changes of the Fermi-level peak intensities. That indicates a spin dependence of 4f hybridization and, thus, of 4f occupancy and local moment. The phenomenon is described in the framework of the periodic Anderson model by 4f electron hopping into the exchange split Fe 3d derived bands that form a spin-gap at the Fermi energy around the ¯Γ point of the surface Brillouin zone.



    Yu. S. Dedkov, M. Fonin, Yu. Kucherenko, S. L. Molodtsov, U. Rüdiger, C. Laubschat
    Phys. Rev. B 76, 073104
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  5. (2007) YCo2: Intrinsic Magnetic Surface of a Paramagnetic Bulk Material

    Here we report on results of a spin-resolved photoelectron spectroscopic (SRPES) study of YCo2 thin films (150 Å-thick) grown on a W(110) substrate. The films were prepared by co-deposition of stoichiometric amounts of Y and Co onto a clean W surface followed by thermal annealing leading to (2×2) overstructure with respect to W(110) in the low-energy electron diffraction pattern indicated formation of a structurally ordered YCo2(111) surface. While no clear spin asymmetry was observed for bulk-sensitive SRPES data taken at hν=1253.6  eV, the more surface-sensitive SRPES data obtained at hν=21.2  eV photon energy revealed a clear spin-asymmetry probing the validity of the recent theoretical prediction.



    Yu. S. Dedkov, C. Laubschat, S. Khmelevskyi, J. Redinger, P.Mohn, M.Weinert
    Phys. Rev. Lett. 99, 047204
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  6. (2006) Ferromagnetic coupling in Eu/Gd (0001) observed by spin-resolved photoelectron spectroscopy

    We report on a magnetic analysis by means of spin-resolved photoelectron spectroscopy of an atomically flat heteromagnetic rare-earth interface of 1 ML Eu∕Gd(0001). The measurements reveal a high net Eu magnetization at low temperatures reflected by a spin polarization ∼15% of the Eu 4f state. This magnetic Eu configuration is due to a strong ferromagnetic interlayer exchange coupling across the Eu∕Gd interface which overcomes a weak negative intralayer coupling between Eu spins in the hexagonal two-dimensional lattice.



    Yu. S. Dedkov, Th. Kleissner, E. N. Voloshina, S. Danzenbächer, S. L. Molodtsov, C. Laubschat
    Physical Review B 73, 012402
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SPARE PARTS

6
Product image
Product description
Article No.
 
Cu gasket for PHOIBOS 150

PHOIBOS 150 analyzer main flange gasket for Releases R5, R6, R7

2074050088
Rotary feedthrough for IRIS

Replacement feedthrough for PHOIBOS Release R5 & R6 iris mechanism

2060001175
Spindle with Spur and Bevel Gear for Iris

Replacement spindle for PHOIBOS Release R5 & R6 iris mechanism

2055021656
Tubus 3 with Iris

Replacement iris mechanism for PHOIBOS Release R5 & R6

2079150291
Channeltron for Spin-detector

Single replacement channeltron for SPECS MOTT spin detector

2079170042
Channeltron-Arrayset (6)

Replacement channeltron set for SPECS MOTT spin detector

2100004833
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