INFLUENCE OF MAGNETIC FIELD ON RELAXATION EFFECTS IN Ni0.25Zn0.75Fe2O4 S. C. BHARGAVA, S. MØRUP and J. E. KNUDSEN J. Phys. Colloques, 37 C6 (1976) C6-93-C6-96 DOI: 10.1051/jphyscol:1976622