【摘要】 采用传统固相反应法制备了EuCrO3和Eu1-xCaxCrO3多晶样品,研究了其磁性质。实验结果显示,样品的零场冷磁化曲线的测量不具有重复性.在冷却过程中,由于超导磁体中残留捕获场的存在,样品中未被补偿的自旋磁矩被诱导沿捕获场方向择优取向,从而决定了零场冷磁化强度在磁相变温度以下的极性.样品在经历一个非完美零场冷却过程以后,得到的名义零场冷磁化曲线对捕获场具有很大的依赖性.更多还原

【Abstract】 Eu1-xCaxCrO3 and EuCrO3 polycrystalline samples were prepared by solid state reaction and their magnetic properties have been studied.The results suggest that the trapped field plays a key role in the measurement of the zero-field-cooled magnetization curve.The uncompensated spins of Eu1-xCaxCrO3 and EuCrO3 samples can be easily induced to can be easily in the direction of the trapped field during cooling,and therefore determine the polarity of zero-field-cooled magnetization.更多还原