Mechanism of angular momentum transfer from microwaves to a copper ringOlivier Emile, Ronan Niemiec, Christian Brousseau, Janine Emile, Kouroch Mahdjoubi, Wenlong Wei and Bo ThideEur. Phys. J. D, 70 8 (2016) 172DOI: https://doi.org/10.1140/epjd/e2016-70193-6