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These results open up a new avenue for exploring room - temperature single - phase multiferroic thin films by controlling the phase mixing of two perovskite BiRO ( 3 ) ( R = Cr , Mn , Fe , Co , Ni ) materials .
 Chemical: perovskite; Chemical: BiRO ( 3 ); Chemical: Cr; Chemical: Mn; Chemical: Fe; Chemical: Co; Chemical: Ni
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: perovskite; Chemical: BiRO ( 3 ); Chemical: Cr; Chemical: Mn; Chemical: Fe; Chemical: Co; Chemical: Ni