Condensed-Matter Physics & Materials Science Seminar

"Depth dependent studies of magnetic and superconducting properties of thin films and heterostructures with polarized low energy muons"

Presented by Elvezio Morenzoni, Paul Scherrer Institute, Switzerland

Wednesday, September 2, 2009, 11:00 am — Small Seminar Room, Bldg. 510

Positive polarized muons $\mu^{+}$ act as a non-destructive, non-invasive, and sensitive microscopic probe for local magnetic investigations (muon spin rotation/relaxation, $\mu$SR). Over the years they have provided unique information about magnetic, superconducting and other electronic properties of bulk matter.
A novel extension of the $\mu$SR technique is given by the availability of $\mu^{+}$ with 100\% spin polarization and whose energy can be continuously varied from 0.5 to 30 keV. This allows depth dependent $\mu$SR-studies of thin films, near surface regions and multilayered structures in the range from $\sim$ 1 nm to $\sim$ 300 nm. After a brief introduction of the method, I will overview some experiments including investigations of thin films and heterostructures of various superconducting and magnetic materials, ranging from cuprates through spin glasses to structures and compounds relevant for spintronics applications.

Hosted by: Ivan Bozovic

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