Effects of ultrasonic agitation on the structural and magnetic properties of 'CO''FE' IND. 2''O' IND. 4' nanocrystals - Silva, Anielle Christine Almeida; Dantas, Noelio Oliveira; Franco, Sinesio Domingues; Silva, Ricardo Souza da; Condeles, Jose Fernando; Gratens, Xavier Pierre Marie; Chitta, Valmir Antonio (EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2014)