HoBi的多重磁相变及磁输运研究

Multiple Magnetic Transitions and Magneto-transport of HoBi

通过自助溶剂法制备HoBi单晶样品,详细研究其磁性、磁输运性质,发现该材料具有复杂的磁化行为和极大的磁电阻.和一般的半金属不同的是:HoBi的磁电阻在磁相变过程中偏离二次方关系,表明磁有序相影响磁电阻的形成.此外,还发现载流子补偿及超高的迁移率是极大磁电阻产生的原因.

In this paper,we synthesize HoBi single crystal by the self-flux method,study the magnetism and magneto-transport,and reveal its complicated magnetization behavior and extreme magnetoresistance.Different to common semimetals,the magnetoresistance of HoBi around the magnetic phase transition deviates from the quadratic dependence of field.Besides,the unexpected magnetoresistance is ascribed to the compensated carrier density and ultrahigh mobility.