All measurements were carried out using a Quantum Design MPMS-3 SQUID magnetometer with powder samples (sample mass: 10-20 mg, accurately measured in each case) contained in gelatine capsules. Firstly, the sample was cooled down to 2 K under zero applied field (ZFC) and DC susceptibility was measured under an applied field of 100 Oe of while sweeping temperature to 300 K. Then the sample was cooled back down maintaining the applied field of 100 Oe (FC) and measured again on sweeping the temperature to 300 K. The sample was cooled down once again to 2 K under an applied field of 50 kOe (= 5T) and the Magnetisation versus magnetic field isotherm was recorded by sweeping the field in steps down to -5 T and back to +5T.