Magnetization curves in MnRhP around the Curie temperature

Measurements of detailed magnetization curves have been made in a hexagonal Fe 2 P-type ternary intermetallic compound, MnRhP around the Curie temperature by using a sample-subtracting type magnetometer. For the critical exponents β =0.43 and δ =2.67 were obtained. Though this material is called nearly two-dimensional ferromagnet, the temperature dependence of the spontaneous magnetization determined from Arrott plots has no two-dimensional character. This tendency is different from the case of Cu 2 Sb-type intermetallic compounds, MnZnSb and MnGaGe in which two-dimensional character was observed in β .