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�������պ����ѧѧ�� 2004, Vol. 30 Issue (10) :944-948    DOI:
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�����ų��ȴ������FeCo�Ͻ���������
����1, ������2, �췼��1, ��ݱ�1*
1. �������պ����ѧ ���Ͽ�ѧ�빤��ѧԺ ���� 100083;
2. �������ղ����о�Ժ, ���� 100083
Improvement of soft magnetic properties of FeCo core alloy by vacuum and field annealing
Bi Xiaofang1, Zhang Shanqing2 ,Zhu Fangzhen1, Xu Huibin1*
1. School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics�� Beijing 100083, China;
2. Beijing Institute of Aeronautical Materials, Beijing 100095, China

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Abstract�� Microstructures and soft magnetic properties of FeCo alloy were investigated in an attempt to improve its soft magnetic properties. Microstructural dependence of the magnetic properties was studied by vacuum annealing at various temperatures. Magnetic field annealing was performed to study the dependence of the coerecivity on the magnetic filed applied during annealing. The field annealing effect was observed only for the alloys after recrystallization, and was increased with increasing the applied field within the range of 2.0×104A/m(250Oe). Coercivity of the FeCo alloys was decreased to 72A/m(0~9Oe) after annealing with a magnetic field of 1.76×104A/m��(220Oe)�� at 850��. The microscopic mechanism of the field annealing effect was also discussed in terms of magnetostrictive characterizations.
Keywords�� magnetic field effects   magnetostriction   FeCo alloy   soft magnetic properties     
Received 2004-04-28;
Fund:

���տ�ѧ����������Ŀ(02H51012)

About author: ������(1961-),Ů,������, ����, bixf@buaa.edu.cn.
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����, ������, �췼��, ��ݱ�.�����ų��ȴ������FeCo�Ͻ���������[J]  �������պ����ѧѧ��, 2004,V30(10): 944-948
Bi Xiaofang, Zhang Shanqing , Zhu Fangzhen, Xu Huibin.Improvement of soft magnetic properties of FeCo core alloy by vacuum and field annealing[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2004,V30(10): 944-948
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