Evolution of magnetic and dielectric properties in Sr-substituted high-temperature multiferroic YBaCuFeO5Surender Lal, Sanjay K. Upadhyay, K. Mukherjee and C. S. YadavEPL, 117 6 (2017) 67006DOI: https://doi.org/10.1209/0295-5075/117/67006