surface magnetism group (as a research team) was formed in 1982. At the beginning the group existed as a SPES laboratory. During
this time we were creating a spin polarized electron gun and a SPLEED
detector. The surfaces of solids were investigated with the help
of these newly developed equipment. The main results of the first
period were published in Soviet journals (in Russian). Great experience
in the field of Spectroscopy of Polarized electrons was also acquired
while carrying out common experiments in different laboratories
in Switzerland, Germany, England and France.
In the middle of the nineties we understood
that for the research of surface magnetism and other spin effects
it is necessary to create a more efficient and convenient spin detector.
By that time it became obvious that only a Mott detector can provide
the required efficiency and stability. But one question remained
controversial for some time: Should we use a classical or a retarding
potential detector. To solve this problem we chose a very simple
(pragmatic) way. A Mott detector of each type was produced at the
same time and tested under identical conditions. After these experiments
we gave up the use of the retarding potential Mott detector because
of its low space stability (high sensitivity to weak changes of
the electron beam parameters) [1,2]. The experience acquired while
doing this helped us to create a new generation of compact and efficient
classical Mott detectors .
Altogether we have made 14 Mott detectors
till now and this number increases permanently. Synchrotrons in
Italy (ELETTRA) and Switzerland (SLS) and laboratories at ETH (Switzerland)
and the University of Regensburg (Germany) were equipped with our
Below we list the main publication devoted
to experiments in which our Mott detectors were used [4-10].
1. A new compact 60 kV Mott polarimeter for spin polarized
V.N. Petrov, M. Landolt, M.S. Galaktionov, B.V. Yushenkov
Rev. Sci. Instrum. 68 (12), 4385 (1997).
2. Comparative tests of conventional
and retarding-potential Mott polarimeters
V.N. Petrov, M.S. Galaktionov, A.S. Kamochkin
Rev. Sci. Instrum. 72 (9), 3728 (2001).
3. New compact classical 40 kV Mott
V.N. Petrov, V.V. Grebenshikov, B.B. Grachev, A.S. Kamochkin
Rev. Sci. Instrum. 74 (3), 1278 (2003).
4. Two - dimensional magnetic particles,
C. Stamm, F. Marty, A. Vaterlaus, V. Weich, S. Egger, U. Maier,
U. Ramsperger, H. Fuhrmann, and D. Pescia
Science 282, 449 - 451 (1998).
5. Two-Step Disordering of Perpendicularly Magnetized Ultrathin
A. Vaterlaus, C. Stamm, U. Maier, M.G. Pini, P. Politi, and D. Pescia
Phys. Rev. Lett. 84, 2247 - 2250 (2000).
6. Imaging Precessional Motion of the Magnetization Vector
Y. Acremann, C.H. Back, M. Buess, O. Portmann, A. Vaterlaus, D.
Pescia, and H. Melchior
Science 290, 492 - 495 (2000).
7. Spin Polarized Fermi Surface
M. Hoersh, T. Greber, V.N.Petrov, M. Muntwiler, M. Hengsberger,
W. Auwarter, J. Osterwalder
Journal of Electron Spectroscopy and Related Phenomena 124 (2-3),
8. An Inverse Transition of Magnetic
Domain Patterns in Ultrathin Films
O. Portmann, A. Vaterlaus, and D. Pescia
Nature 422, 701 - 704 (2003).
9. Spin structure of the Shockley
surface state on Au(111)
M. Hoesch, M. Muntwiler, V.N. Petrov, M. Hengsberger, L. Patthey,
M. Shi, M. Falub, T. Greber, and J. Osterwalder
Phys. Rev. B 69, 241401(R) (2004)
10. Energy analyzer for spin polarized
Auger electron spectroscopy
V. N. Petrov and A. S. Kamochkin
Rev. Sci. Instrum. 75(5), 1274 (2004).