These chambers are connected to two end-stations (LE & HE) of APE beamline with UHV transfer systems in order to prepare samples and characterize them before and/or after the electron spectroscopy with synchrotron light. The sample preparation chamber is equipped with an ion gun, heating stages, evaporators (PVD), a thickness monitor, LEED (Low Energy Electron Diffraction) and AES (Auger Electron Spectroscopy) system, and Kerr magnetometers. It enable users to clean single crystals, grow thin epitaxial films and measure the long range order of the surface structure, surface composition and magnetic property.
Our atomic resolution STM (Scanning Tunneling Microscope) is a powerful tool to measure real space surface structures, with and without long range order, immediately after the sample preparation. It is also used for quantitative analysis of film thickness in submonolayer range grown in the preparation chamber.
|Base pressure||< 1 x 10 -10 mbar|
|3 heating stages||HT (RT- 2000K), WT (170K - 900K), LT (RT - 700K)|
|Ion gun (SPECS IQE11/35)|
|3 evaporator ports (CF40)|
|Gas inlet valve (variable leak valve)|
|LEED+AES (Omicron SPECTALEED)|
|3 Kerr magnetometers||Transversal (Hmax=600 Oe), Polar (Hmax=3000 Oe), 3D (Hmax=80 Oe)|
|STM (room temperature, ETH-Z built))|
The main scientific interest is to study electronic, magnetic and geometrical structures of surface and interfaces by means of photoelectron spectroscopy, photoabsorption spectroscopy, x-ray magnetic circular dichroism, STM and STS. The electronic and geometrical structures of magnetic materials are of particular interest.