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EFFECT OF Ta AND Ta/Cu BUFFERS ON THE EXCHANGE BIAS FIELD OFNiFe/FeMn BILAYERS

LI MING-HUA YU GUANG-HUA JIANG HONG-WEI CAI JIAN-WANG ZHU FENG-WU

EFFECT OF Ta AND Ta/Cu BUFFERS ON THE EXCHANGE BIAS FIELD OFNiFe/FeMn BILAYERS

LI MING-HUA, YU GUANG-HUA, JIANG HONG-WEI, CAI JIAN-WANG, ZHU FENG-WU
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  • The NiFe/FeMn bilayers with different buffer layers (Ta or Ta /Cu) and Ta cover layers were prepared by magnetron sputtering. The results showed that the exchange bias field of NiFe/FeMn films with the Ta buffer was higher than that of the films with the Ta/ Cu buffer .We investigated the crystallographic texture, surface roughness and surface segregation, and demonstrated that the decrease of the exchange coupling field was caused by the Cu surface segregation in NiFe/FeMn films with Ta/ Cu buffer layers.
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  • Received Date:  07 June 2001
  • Published Online:  20 November 2001

EFFECT OF Ta AND Ta/Cu BUFFERS ON THE EXCHANGE BIAS FIELD OFNiFe/FeMn BILAYERS

  • 1. (1)北京科技大学材料物理系,北京100083; (2)首都师范大学物理系,北京100037; (3)中国科学院物理研究所磁学国家重点实验室,北京100080; (4)中国科学院物理研究所磁学国家重点实验室,北京100080;北京科技大学材料物理系,北京100083

Abstract: The NiFe/FeMn bilayers with different buffer layers (Ta or Ta /Cu) and Ta cover layers were prepared by magnetron sputtering. The results showed that the exchange bias field of NiFe/FeMn films with the Ta buffer was higher than that of the films with the Ta/ Cu buffer .We investigated the crystallographic texture, surface roughness and surface segregation, and demonstrated that the decrease of the exchange coupling field was caused by the Cu surface segregation in NiFe/FeMn films with Ta/ Cu buffer layers.

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