Biography - John E. Greedan

The Bertram Eugene Warren Diffraction Physics Award is awarded to outstanding scientists to recognize important recent contribution to the physics of solids or liquids using X-ray, neutron, or electron diffraction techniques. The 2024 award celebrated John Greedan (McMaster University, Hamilton, Ontario) with this prestigious award at the 74th annual American Crystallographic Association meeting in Denver, Colorado. Greedan has made tremendous contributions to the research on structure-property relationships in perovskites and pyrochlores. In particular, his body of work on pyrochlores has had an immense impact on the field, making him one of the most influential researchers in this area. He has used neutron diffraction elegantly for both crystal structure and magnetic structure determination. His papers “Magnetic Pyrochlore Oxides” (Rev. Modern Phys. 2010, 82, 53) and “Geometrically frustrated magnetic materials” (J. Mater. Chem. 2001, 11, 37) are highly revered in the field and have been cited thousands of times.

View John Greedan’s Warren Award lecture, “Exploring the Structure/Property Nexus in Perovskite and Pyrochlore Oxides,” on the ACA YouTube channel, at https://youtu.be/fpoGbzHqgq0.