Giant Magneto-Impedance of Co50Ni22Ga28 Alloy with High Chemical Ordering

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2005,（10）
• 页码范围: 2630-2632
• 页数: 3页
• 语种: 英文

摘要

The microstructure of Co50Ni22Ga28 ribbon with the L10 structure is examined. The band-like morphology is observed. These bands with the width in a range of 40-200 nm appear along the transverse direction of the ribbon.The giant magnetoimpedance (GMI) effect in this alloy is measured. The results show that Co50Ni22Ga28 exhibits a sharp peak of the GMI effect. The maximum GMI ratio up to 360% is detected. The GMI effect measured versus temperature shows large jumps of the magnetoimpedance amplitude at the reversal martensitic transformation temperature 240 ℃ and Curie temperature 375 ℃ respectively. The jump ratios of the magnetoimpedance amplitude examined at these temperatures are about 5 and 10, respectively.