Cluster glass behaviour in Co-substituted double perovskite Ca2FeMoO6

Synthesis, structure and magnetic properties of La3Co2SbO9: A double perovskite with competing antiferromagnetic and ferromagnetic interactions

“…The hysteresis loop is shifted around the origin, the corresponding remanent magnetizations are 2.41 and À 2.33 emu/g and both coercive fields are very high: 9.05 and À 11.31 kOe, respectively. This asymmetry could indicate the presence of exchange bias interactions, which normally occurs in systems where antiferromagnetic and ferromagnetic internal regions are in contact [33][34][35]. However, we cannot confirm the presence of exchange bias, because the field of the reversibility in a hysteresis loop is not reached by the experimental limit of H¼50 kOe in our magnetometer.…”