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Prof. Tom Lancaster: How muons reveal the best-kept secrets of low-dimensional magnets

Date: 4. 4. 2017
Source: Monday physics colloquium
Ponedeljek, 10. april 2017, ob 16:15 v predavalnici F1, FMF UL, Jadranska 19, Ljubljana

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Povzetek:

How muons reveal the best-kept secrets of low-dimensional magnets

Prof. Tom Lancaster

Department of Physics, Durham University, United Kingdom

Muons are subatomic particles that may be implanted in materials and used as sensitive magnetometers. In many cases, muons have been shown to be sensitive to magnetic transitions that are invisible to more conventional magnetometry. This is especially useful in low-dimensional and frustrated magnetism where strong thermal and quantum fluctuations make transitions to states of long-range magnetic order difficult to observe. In this talk I will describe how muon-spin relaxation has been used to identify magnetic transitions and excitations in several examples of low-dimensional molecular magnetic material. I will also discuss the recent use of muons in investigating topological matter such as the physics of skyrmions in bulk crystals and thin films.