MAGNETIC-PROPERTIES OF NIXCD1-XMN2O4 LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-0.8)

The present work deals with the detailed investigations on the magneti c properties of the mixed manganite system: NixCd1-xMn2O4 (0.2 less th an or equal to x less than or equal to 0.8). In addition to Mn3+ aniso tropy, the random substitution of diamagnetic ion at A-sites introduce s further disorder in B-sites resulting in weakening of AB bonds. The results are compared with isotropic canted ferrites and reentrant syst ems. By applying ferromagnetic scaling law, successive transitions are identified as a function of temperature: paramagnetism to short-range order (or cluster state) to ferrimagnetism or canted magnetic state, depending on concentration range. The effect of random anisotropies gi ves rise to modified magnetic properties at low temperatures (T < 20 K ) which mimic local canted state features, while spin-glass-like phase could exist at very low field and low temperature.