The Institute of Physics (IOP) offers members of Clausthal University of Technology the opportunity to publish an unlimited number of articles in 53 hybrid journals and 19 Gold Open Access journals under a CC BY 4.0 license without an embargo period. The costs for this are covered by the University Library via an Institutional Research License. Further information and a list of eligible journals can be found here.
You can download the title list of the journals to which you have free reading access here.