Abstract
The magnetic properties of rare earth rich intermetallic compound, Tb3Co, were studied under external pressures up to ∼1.21 GPa. The application of external pressure results in a decrease of the transition temperatures, (paramagnetic to modulated antiferromagnetic) by about 6 K, and the order to order transition that coincides with a glass transition at 72 K by about 15 K, respectively. The low temperature drop in the zero-field cooled magnetisation signifying the strengthening of spin–orbit coupling remains more or less unaffected (shifts only by 3 K) by the external pressures but significant changes in the magnetic behaviour were observed above 40 K. The overall long range non-collinear magnetic order coexisting with glassy behaviour (below 72 K) is sustained even at ∼1.07 GPa pressure. The rate of decay of (d) is found to be linear with −7.2 K GPa−1 up to ∼0.9 GPa and then it deviates from linearity. The magnetic relaxations and memory effects studied under different measurement protocols confirm the presence of glassiness right up to the highest pressure, although the glassy behaviour is weakened to some extent with increasing pressure as reflected by faster relaxations.
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