Effect of Bath pH on the Squareness of Electroless CoNiWP Magnetic Films

J. Mater. Sci. Technol. ›› 2008, Vol. 24 ›› Issue (05): 712-714.

Effect of Bath pH on the Squareness of Electroless CoNiWP Magnetic Films

程海滨;许帅;邹声泉;赵素玲;赵文俞;孙志刚;张清杰

武汉理工大学材料复合新技术国家重点实验室

收稿日期:2007-04-17 修回日期:2007-10-20 出版日期:2008-09-28 发布日期:2009-10-10
通讯作者: 程海滨

Effect of Bath pH on the Squareness of Electroless CoNiWP Magnetic Films

Haibin CHENG, Shuai XU, Wenyu ZHAO, Suling ZHAO, Pengcheng ZHAI, Zhigang SUN, Qingjie ZHANG

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

Received:2007-04-17 Revised:2007-10-20 Online:2008-09-28 Published:2009-10-10
Contact: Qingjie ZHANG

摘要/Abstract

摘要： 在不同镀液pH值时用化学镀法制备了CoNiWP磁性薄膜，并用EDS,XRD,MFM和VSM对其进行了表征。薄膜的微观结构和磁性能受到镀液pH的强烈影响。当化学镀液的pH 值为8.06时，晶粒粒径和矫顽力也达到最大值，而矩形比却为最小值。Henkel曲线表明镀液pH 为8.06时交换耦合作用很微弱，这是可能是由相偏聚和大的晶粒尺寸引起的，并导致了最低的矩形比。当pH大于8.5时，由于不存在相偏聚和晶粒的细化，薄膜存在明显的交换耦合作用。

关键词: CoNiWP磁性薄膜, Bath, pH, Squarenes, Exchang

Abstract: Electroless CoNiWP magnetic films were prepared by varying the bath pH and then characterized by energy dispersive X-ray analysis, X-ray diffraction and magnetic force microscopy. It has been found that the microstructure and the magnetic properties of films were influenced greatly by the bath pH. At the bath pH 8.06, the grain size and coercivity of the films reach maximum, while the squareness (Mr=Ms) of MH curves reaches minimum. The Henkel plots indicates that the exchange-coupling interaction is very weak at this pH, which may be caused by phase-separation and large grain size, and then results in the lowest squareness. At pH above 8.5, obvious exchange-coupling interaction is observed because of the inexistence of phase-separation and the refinement of grain size.

Key words: CoNiWP magnetic film, Bath pH, Squareness, Exchange-coupling interaction

程海滨; 许帅; 邹声泉; 赵素玲; 赵文俞; 孙志刚; 张清杰. Effect of Bath pH on the Squareness of Electroless CoNiWP Magnetic Films[J]. J. Mater. Sci. Technol., 2008, 24(05): 712-714.

Haibin CHENG, Shuai XU, Wenyu ZHAO, Suling ZHAO, Pengcheng ZHAI, Zhigang SUN, Qingjie ZHANG. Effect of Bath pH on the Squareness of Electroless CoNiWP Magnetic Films[J]. J Mater Sci Technol, 2008, 24(05): 712-714.

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Effect of Bath pH on the Squareness of Electroless CoNiWP Magnetic Films

Effect of Bath pH on the Squareness of Electroless CoNiWP Magnetic Films

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