FERROELECTRIC PROPERTIES OF BaBi4Ti4O15 DOPED WITH Pb2+, Al3+, Ga3+, In3+, Ta5+ AURIVILLIUS PHASES - Rosyidah, Afifah; Department of Chemistry, Sepuluh Nopember Institute of Technology, Jl. Arif Rahman Hakim, Surabaya, 60111 (Universitas Gadjah Mada, 2010)