Joachim Stöhr (born September 28, 1947)[1] is a physicist and professor emeritus of the Photon Science Department of Stanford University.
His research has focused on the development of X-ray and synchrotron radiation techniques and their applications in different scientific fields with emphasis on surface science and magnetism.
[1] Stöhr’s research has focused on the development of novel investigative techniques based on soft x-ray synchrotron radiation for exploring the structure, electronic and magnetic properties of surfaces and thin films.
Starting in the early 1990s he has concentrated on the use of polarized soft x-rays to study magnetic materials and phenomena, especially thin films, interfaces and nanoscale structures.
He has pioneered x-ray magnetic spectro-microscopy which allows the direct observation of nanoscale antiferromagnetic and ferromagnetic domain structures with elemental and chemical state specificity.