THE ELECTRONIC ALADDIN NEWSLETTER NO. 9
November / December 1996
USERS MEETING AT THE MARCH APS MEETING IN KANSAS CITY
Instead of the traditional SRC Users Meeting, there will be a gathering on Sunday,
March 16 at the site of the APS March Meeting in Kansas City, plus a topical workshop (see
item 3). This reduces the travel burden for a large community of SRC users and allows
taking advantage of inexpensive Saturday-night air fares. The Users Advisory Committee
will also meet that day. We are considering a late afternoon plus evening event, where SRC
staff will give an update of the SRC facilities and future plans. During dinner, the
Aladdin Lamp Award will be presented for the best thesis performed at SRC. Suggestions
about the program are welcomed. Send them to Franz Himpsel (email@example.com)
or Pam Layton (firstname.lastname@example.org).
For planning the room and other logistics please send a note to Pam Layton (email@example.com) about how many
persons will tentatively attend.
RENAMING OF SRC
At their meeting on December 6, the Board of Regents of the University of Wisconsin
System approved a proposal to rename SRC the Ednor M. Rowe Synchrotron Radiation
Center. A rededication ceremony will be held in the spring.
SRC WORKSHOP ON MCD AND MAGNETIC NANOSTRUCTURES
The first of a series of workshops on SRC-related topics was held on
November 16. It brought researchers and students in magnetism and surface physics
together, leading to lively discussions that lasted well past the originally-scheduled
cocktail hour. SRC staff got a lot of input on what type of experiments to plan for.
Several beam lines and end stations at the SRC are dedicated to research on magnetism,
such as two MCD chambers that can be used with the 10m TGM and HERMON monochromators, a
magnetic scattering setup at the multilayer beam line, a photoelectron microscope, and a
spin-polarized, angle-resolved hotoemission station at the 30 period undulator. Among the
|Magnetic microscopies, looking at the domain structure.
Magnetic circular dichroism, particularly extended to new core levels.
Magneto-Optics in general, linear and non-linear.
Spin-polarized, angle-resolved photoemission, quantum well states.
Magnetic X-ray scattering, comparing structural and magnetic roughness.
Nanostructures, multilayers, clusters.
MAGNETIC X-RAY SCATTERING GETS ATTENTION
Work carried out by Jim MacKay and co-workers at the multilayer beam line at SRC has
generated considerable interest (see a recent publication in Phys. Rev. Lett. 77, 3925,
1996 and a discussion of this work in Physics Today 49, November 1996, p. 21). The special
feature of this experiment is its capability to determine the magnetic roughness of
interfaces, in addition to the usual, structural roughness. Measuring the scattering of
soft X-rays in the anomalous region of the 2p-to-3d absorption edge allows it to obtain
elemental contrast by tuning into the edge of a specific element. In addition, magnetic
contrast is obtained by using circularly-polarized light and detecting the difference in
scattering for opposite sample magnetizations. This experiment showed that the
magnetization distribution at cobalt/copper interfaces is smoother than the geometric
Co/Cu interface. Co/Cu multilayers are used in prototype structures for the next
generation of magnetoresistive reading heads for magnetic storage disks. Interface
roughness has been found to affect their magnetoresistance, but the mechanism for this
effect is still unclear, thus providing an interesting target for magnetic scattering
AWARDS FOR SRC RESEARCHERS
Prof. Michael Bancroft
(University of Western Ontario)
. . . was awarded the Chemical Institute of Canada Medal 1996.
Prof. Leonard Brillson
(Ohio State University)
. . . was awarded a Surface Science Excllence award by Surface Science Magazine for the
most highly cited article in surface science since 1980 (and the most cited article in
Surface Science Reports).
TANTALUS SHIPPED TO THE SMITHSONIAN INSTITUTION
On Wednesday, December 11, 1996 half of the Tantalus storage ring was shipped to the
Smithsonian in Washington DC. It will eventually be on display in the Museum of American
History as part of an exhibit devotedto electron storage rings and synchrotron radiation
CALL FOR BEAM TIME PROPOSALS
A letter requesting beam time proposals for the period from August '97 to July '98 went
out recently. Due date is February 7, 1997. If you do not receive a Beamtime Request form
and would like one, please contact Pam Layton
SOLICITATION OF NOMINATIONS FOR THE ALADDIN LAMP AWARD
The Aladdin Lamp Award is awarded annually for the best PhD thesis
performed at SRC. The '96 award will be handed out at the Users Meeting Sunday evening
before the March Meeting in Kansas City (March 16, 1997, see item 1). Send nominations to:
which include the following:
1. A brief letter of nomination from the applicant's advisor. This letter should
clearly state the role of the applicant in the research project.
2. An extended abstract (4 page maximum, including figures) of the work performed at SRC,
written by the applicant.
3. The applicant's curriculum vitae including publications and work in progress.
4. Supporting material, such as preprints/reprints can be submitted, but is not required.
Deadline is February 7, 1997.
Franz J. Himpsel
Dept. of Physics, University of Wisconsin Madison
1150 University Ave.
Madison, WI 53706-1390
Tel: 608-263-5590, -262-5047, -877-2138 Fax: 608-265-2334
Web page: http://www.physics.wisc.edu/~himpsel/