Effects of Doping on the Magnetic Properties and Frustration of Hexagonal YMn_0.9A_0.1O₃（A=Al,Fe,and Cu）

【摘要】 The doping effects on the frustration and the magnetic properties in hexagonal compounds of YMn_0.9A_0.1O₃（A=Al,Fe and Cu） are investigated.Experimental results indicate that both the non-magnetic and magnetic ion dopants lead to the increase of magnetic moments and the decrease of the absolute value of Curie-Weiss temperature(|θ_CW|).Compared with pure YMnO₃,the geometrical frustration of YMn_0.9A_0.1O₃ is greatly suppressed and the magnetic coupling in that exhibits dopant-dependent.In addition,for the doped YMn_0.9A_0.1O₃,the antiferromagnetic transition temperature（T_N） is also suppressed slightly,which shows an abnormal dilution effect and it may be ascribed to the reduction of frustration due to the chemical substitution.更多还原

【Abstract】 The doping effects on the frustration and the magnetic properties in hexagonal compounds of YMn_0.9A_0.1O₃（A=Al,Fe and Cu） are investigated.Experimental results indicate that both the non-magnetic and magnetic ion dopants lead to the increase of magnetic moments and the decrease of the absolute value of Curie-Weiss temperature(|θ_CW|).Compared with pure YMnO₃,the geometrical frustration of YMn_0.9A_0.1O₃ is greatly suppressed and the magnetic coupling in that exhibits dopant-dependent.In addition,for the doped YMn_0.9A_0.1O₃,the antiferromagnetic transition temperature（T_N） is also suppressed slightly,which shows an abnormal dilution effect and it may be ascribed to the reduction of frustration due to the chemical substitution.更多还原