INFLUENCE OF LANTHANUM DOPING ON THE STRUCTURAL, MORPHOLOGICAL AND THERMAL CHARACTERISTICS OF NICKEL FERRITE Journal title: ROMANIAN JOURNAL OF TECHNICAL SCIENCES - APPLIED MECHANICS Authors: TRAIAN FLORIN MARINCA, MARIUS CRISTIAN OLARU, BOGDAN VIOREL NEAMȚU, FLORIN POPA, IONEL CHICINAȘ Subject(s):