Magnetization Study of Rare earth rich Intermetallic Compound

摘要

Magnetization studies as function of temperature and magnetic field on arc melted rare-earth intermetallic compound of Tb_1Y_2Co is reported in this paper. ZFC-FC curves show a huge bifurcation at low temperature (T < 35K). ZFC curve exhibits a peak around 27K and decreases nearly to zero value as T is lowered 2K. M vs H isotherms for T < 15K exhibit antiferro to ferro (metamagnetic) transition indicating presence of antiferromagnetic order below 15K. Above 15K ferromagnetic order is present. The spontaneous and saturation (at 9T) magnetic moments estimated to be 3.80 μ_B ~(an)d 5.24 μ_B (at 10K), respectively. The effective paramagnetic moment calculated from Curie-Weiss analysis turns out to be 4.20 μ_B, much less than the free ion Tb~3+ value of 9.7 μ_B. All these results seem to suggest noncollinear magnetic order just like parent compound still prevalent in this compound but to a much lower extent.