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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.


  • Robust Spin Detector with long lifetime
  • High Energy Scattering Scheme
  • 6 Channel MCD Detector




PHOIBOS 150 Mott - MCD
Energy Dispersion by



8 Entrance, 3 Exit slits and Iris aperture

Lens Modes

  • Angular resolved Mode
  • Transmission Mode
  • Spatially resolved Mode
  • Acceptance Angle


    Working Pressure

    10-11 to 10-7 mbar

    Kinetic Energy Range

    0 - 3500 eV

    Pass Energies

    0 - 550 eV continously adjustable



    Detector Channels


    Measurement Modes

  • Sweeping Mode
  • Fixed Mode
  • Energy Window

    13% of Pass Energy


    HSA 3500 plus HT 152

    Angular Resolution

    < 0.5°

    Energy Resolution

    <10 meV for XPS

    Lateral Resolution

    < 100 µm

    XPS Count Rates UHV

    Ag 3d measured with XR 50 300 W MgKa > 2 Mcps @ 0.85 eV, > 6 Mcps @ 1.00 eV

    Mounting Flange

    DN100 CF

    Magnetic Shielding

    Double µ-Metal Shielding

    Working Distance

    40 mm

    Electric Isolation

    up to 7 keV



    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
      Read more
    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
      Read more
    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
      Read more
    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
      Read more
    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
      Read more
    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
      Read more


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

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

    Rotary feedthrough for IRIS

    Replacement feedthrough for PHOIBOS Release R5 & R6 iris mechanism

    Spindle with Spur and Bevel Gear for Iris

    Replacement spindle for PHOIBOS Release R5 & R6 iris mechanism

    Tubus 3 with Iris

    Replacement iris mechanism for PHOIBOS Release R5 & R6

    Channeltron for Spin-detector

    Single replacement channeltron for SPECS MOTT spin detector

    Channeltron-Arrayset (6)

    Replacement channeltron set for SPECS MOTT spin detector



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